The Connecticut ADU & Zoning Policy Atlas: Complete 169-Town Guide

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The Connecticut ADU & Zoning Policy Atlas: Complete 169-Town GuideThis is a very detailed work in progress.  Need more help call or text 203-994-3950

Accessory Dwelling Units (ADUs)—also known as accessory apartments, in-law suites, carriage houses, or backyard cottages—represent the most significant shift in Connecticut residential land use in decades.

This atlas provides the authoritative legal foundation under Public Act 21-29, details local health and septic hurdles (B100a Application Reviews), and provides direct municipal land-use links and regulatory profiles for property owners, architects, and investors across all 169 Connecticut towns.

1. The Legal Blueprint: Connecticut Public Act 21-29

In 2021, the Connecticut General Assembly enacted Public Act 21-29 (codified under CGS § 8-2), establishing a statewide baseline designed to increase housing choice:

  • State Baseline Standard: Permitted at least one ADU as-of-right (administrative staff approval with no public hearing) on any single-family residential lot.

  • Structure Options: Allowed both attached (basement conversions, additions) and detached (backyard cottages, carriage houses) units.

  • Size Ceilings: Set maximum unit sizes at 1,000 sq ft or 30% of the primary dwelling’s floor area, whichever is less (towns may allow larger).

  • Parking Limits: Prohibited municipal commissions from requiring more than one dedicated off-street parking space per ADU.

  • Utility Protections: Prohibited utility authorities from charging disproportionate connection fees or treating an ADU as a separate commercial sewer/water entity.

The Statutory Opt-Out Mechanism

The legislation allowed municipal Planning and Zoning Commissions (P&Z) to opt out of the state default provisions by a two-thirds majority vote of both the P&Z commission and the local legislative body before January 1, 2023.

  • 115 Municipalities Opted Out: Retained local autonomy to enforce their own custom accessory apartment regulations.

  • 54 Municipalities Opted In (or missed the statutory deadline): Governed directly by statewide baseline standards under PA 21-29.

Opting out did not ban ADUs. Nearly all opt-out municipalities permit accessory apartments, but they enforce local conditions such as owner-occupancy covenants, detached setbacks, special permits, or square-footage limits.

2. Critical Regulatory Checkpoints

Every ADU project in Connecticut must clear four distinct statutory hurdles before construction:

  • As-of-Right vs. Special Permit: As-of-Right projects require only zoning staff and building official sign-off. Special Permits require public hearings before the P&Z Commission, certified mail notices to abutting neighbors, and formal architectural site reviews.

  • Subsurface Septic Review (B100a): In non-sewered towns, adding living space or bedroom counts triggers a mandatory CT DPH B100a Application Review. You must prove a code-compliant primary leaching system and a 100% reserve area on the lot.

  • Owner-Occupancy & Deed Restrictions: Many opt-out towns require the property owner to reside in either the primary home or the ADU, backed by a formal affidavit or deed covenant recorded on the town land records.

  • Short-Term Rental (STR) Restrictions: Under PA 21-29 § 6(d), municipalities retain the right to restrict or prohibit using accessory apartments as short-term rentals (stays under 30 days) via platforms like Airbnb or VRBO.

Fairfield County (All 23 Municipalities Complete Directory)

Bethel Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 118-24)

  • Permitting Track: As-of-Right for conforming attached; Special Permit for detached units

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of principal dwelling area

  • Operational Rules: Owner-occupancy required; Recorded deed covenant required; STRs restricted

  • Infrastructure Review: Town WPCA or Bethel Health Department B100a septic review

Bridgeport Zoning Regulations | Fairfield County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / Zone Bridgeport Code)

  • Permitting Track: As-of-Right (Administrative Staff Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Maximum 1 dedicated off-street parking space; Municipal building code standards apply

  • Infrastructure Review: Bridgeport WPCA Public Sewer connection required

Brookfield Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Zoning Regulations § 242-404)

  • Permitting Track: Staff Administrative Review for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft; Maximum 2 bedrooms

  • Operational Rules: Owner must reside on-site; Deed restriction filed on municipal land records

  • Infrastructure Review: Brookfield WPCA sewer or Brookfield Health Department B100a septic review

Danbury Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (City Zoning Regulations § 3.C.7 & § 3.E.5)

  • Permitting Track: As-of-Right in designated single-family zones; Special Exception in select multi-family zones

  • Allowed Typologies: Attached permitted; Detached permitted with lot area threshold compliance

  • Dimensional Caps: Max 800 sq ft or 30% of living area

  • Operational Rules: Primary residence must be owner-occupied; 1 dedicated parking space required

  • Infrastructure Review: Danbury Public Utilities sewer connection or City Health Department B100a review

Darien Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations Sections 210, 403, 407 / Amendment #94)

  • Permitting Track: Administrative Staff Review for parcels of 1+ acre; P&Z Commission Special Permit for qualifying smaller lots

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 700 sq ft (attached) or 1,000 sq ft (detached); Capped at 30% of primary finished floor area

  • Operational Rules: Strict owner-occupancy mandate; Mandatory recorded deed covenant; Short-term rentals prohibited

  • Infrastructure Review: Darien WPCA sewer or Town Health Department B100a septic review

Easton Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Zoning Regulations § 5.9 / § 5900)

  • Permitting Track: Special Permit (P&Z Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted (strict watershed protection standards apply)

  • Dimensional Caps: Max 1,000 sq ft or 30% of principal structure

  • Operational Rules: Owner-occupancy strictly enforced; Commercial and short-term rentals prohibited

  • Infrastructure Review: Aspetuck Health District B100a septic evaluation (100% private wells and septic)

Fairfield Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Plan & Zoning Regulations § 5.2.2 / Reformatted 2025–2026 Code)

  • Permitting Track: As-of-Right (Administrative Review) for conforming attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,500 sq ft or 40% of primary floor area (whichever is less)

  • Operational Rules: Owner must reside on parcel; Affidavit required on town land records; Long-term residential use only

  • Infrastructure Review: Town WPCA Sewer connection or Fairfield Health Department septic approval

Greenwich Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Building Zone Regulations § 6-95 & § 6-99)

  • Permitting Track: Special Permit (Planning and Zoning Commission Approval required)

  • Allowed Typologies: Attached allowed; Detached permitted only on qualifying single-family parcels

  • Dimensional Caps: Max 1,200 sq ft or 35% of principal building footprint

  • Operational Rules: Strict Owner-Occupancy required; Annual renewal affidavit; Short-term rentals prohibited

  • Infrastructure Review: Greenwich WPCA Public Sewer in urban zones; Town Health Department septic review in backcountry

Monroe Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 6.4 / Adopted ADU Standard)

  • Permitting Track: Staff Administrative Approval for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of primary residence

  • Operational Rules: Owner must occupy principal or accessory dwelling; Annual certification required

  • Infrastructure Review: Trumbull-Monroe Health District septic clearance or municipal sewer

New Canaan Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.4.B)

  • Permitting Track: Special Permit (P&Z Hearing) for detached; Administrative Review for select attached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of total dwelling area

  • Operational Rules: Owner-occupancy required; Deed restriction recorded; Short-term rentals barred

  • Infrastructure Review: Town Sewer or New Canaan Health Department B100a review

New Fairfield Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.2.5)

  • Permitting Track: Staff Review for internal/attached; Special Permit for detached units

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft

  • Operational Rules: Owner-occupancy mandatory; Candlewood Lake watershed environmental setbacks apply

  • Infrastructure Review: Town Health Department B100a septic approval (100% private septic/wells)

Newtown Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.01.500–506)

  • Permitting Track: As-of-Right (Administrative Staff Review with Building/Health sign-offs)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 40% of primary dwelling floor area (whichever is less)

  • Operational Rules: Single-family architectural character maintained; Minimum 30-day rental duration

  • Infrastructure Review: Newtown Health District B100a septic review

Norwalk Zoning Regulations | Fairfield County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / Local Building-Zoning Code)

  • Permitting Track: As-of-Right by Zoning Permit (Staff Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft (Detached footprint capped at 60% of primary structure)

  • Operational Rules: Minimum 6-month rental lease duration; Owner-occupancy annual affidavit required

  • Infrastructure Review: City Sewer / Norwalk Health Department B100a review

Redding Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 5.12 / Accessory Apartment Standards)

  • Permitting Track: Special Permit (Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted (detached requires 50% larger lot area than base zone)

  • Dimensional Caps: Max 600 sq ft (internal attached additions capped at 450 sq ft new floor area)

  • Operational Rules: Owner-occupancy strictly required in primary home; 2 off-street parking spaces dedicated

  • Infrastructure Review: Redding Health Department B100a septic certification (detached requires separate septic)

Ridgefield Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.3.B & § 3.3.D)

  • Permitting Track: Administrative Staff Review for attached; Special Permit for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of principal structure

  • Operational Rules: Owner must reside on-site; Deed covenant mandatory; Short-term rentals prohibited

  • Infrastructure Review: Ridgefield Health Department B100a septic and private well review

Shelton Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (City Zoning Regulations § 31.5)

  • Permitting Track: Administrative Approval for internal; Special Exception for detached additions

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of primary floor area

  • Operational Rules: Owner-occupancy required; Off-street parking mandate enforced

  • Infrastructure Review: City Sewer connection or Naugatuck Valley Health District septic approval

Sherman Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 324.1)

  • Permitting Track: Special Permit (Planning and Zoning Commission Approval)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft

  • Operational Rules: Strict owner-occupancy mandate; Candlewood Lake environmental setbacks apply

  • Infrastructure Review: Town Health Department B100a septic clearance (100% private wells and septic)

Stamford Zoning Regulations | Fairfield County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / City Master Code)

  • Permitting Track: As-of-Right (Land Use Bureau Administrative Staff Review)

  • Allowed Typologies: Attached and Detached ADUs allowed on single-family parcels

  • Dimensional Caps: Up to 1,000 sq ft or 30% of primary structure

  • Operational Rules: No owner-occupancy deed restriction mandated under baseline statutory rules; 1 parking space max

  • Infrastructure Review: Stamford WPCA Public Sewer connection or City Health Department B100a Review

Stratford Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.1.6 / Comprehensive Code Update)

  • Permitting Track: As-of-Right (Staff Administrative Review)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of gross floor area

  • Operational Rules: Owner-occupancy required; Long-term rental agreements only

  • Infrastructure Review: Town WPCA public sewer connection required

Trumbull Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 1.1.2 & § 1.1.3)

  • Permitting Track: Administrative for internal footprint conversions; Special Permit for structural additions

  • Allowed Typologies: Attached Only (detached carriage or outbuilding ADUs strictly prohibited)

  • Dimensional Caps: Minimum 300 sq ft; Maximum 30% of livable floor area of primary home

  • Operational Rules: Owner-occupancy mandatory; Single-family exterior aesthetic required; No separate front entrance

  • Infrastructure Review: Trumbull WPCA Sewer or Trumbull-Monroe Health District septic approval

Weston Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 320 / Section 345 Apartments)

  • Permitting Track: Special Permit (P&Z Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted on 2-acre minimum parcels

  • Dimensional Caps: Max 1,000 sq ft or 25% of principal dwelling

  • Operational Rules: Owner-occupancy required; Strict deed covenant filed on municipal land records

  • Infrastructure Review: Aspetuck Health District B100a septic approval (100% private wells and septic)

Westport Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Planning and Zoning Regulations § 32-1)

  • Permitting Track: Staff Administrative Review for attached; Special Permit for detached accessory structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 25% of gross residential floor area

  • Operational Rules: Owner-occupancy required; Deed restriction filed; Short-term rentals prohibited

  • Infrastructure Review: Westport WPCA Sewer or Westport-Weston Health District septic clearance

Wilton Zoning Regulations | Fairfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 29-4.D.1)

  • Permitting Track: As-of-Right (Administrative Review) for attached; Special Permit for detached barn/structure conversions

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal structure

  • Operational Rules: Owner-occupancy required; Deed covenant recorded; STRs prohibited

  • Infrastructure Review: Wilton Health Department B100a septic review

Hartford County

Avon Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.3.3 & § 4.3.4)

  • Permitting Track: As-of-Right (Staff Administrative Review) for conforming attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal structure livable area

  • Operational Rules: Owner-occupancy required in primary or accessory unit; Recorded deed restriction required

  • Infrastructure Review: Farmington Valley Health District (FVHD) B100a septic review or Avon WPCA sewer connection

Berlin Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § IX.B)

  • Permitting Track: Administrative Review for internal conversions; Special Permit for new exterior additions

  • Allowed Typologies: Attached permitted; Detached restricted by zone and lot size

  • Dimensional Caps: Max 800 sq ft or 25% of gross floor area

  • Operational Rules: Owner-occupancy mandatory; Deed covenant recorded on town land records

  • Infrastructure Review: Town WPCA public sewer connection or Central CT Health District septic approval

Bloomfield Zoning Regulations | Hartford County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29)

  • Permitting Track: As-of-Right by Zoning Permit (Staff Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Maximum 1 dedicated off-street parking space; STRs subject to municipal licensing

  • Infrastructure Review: MDC Public Sewer connection or Bloomfield Health Department B100a review

Bristol Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (City Zoning Regulations § IV.A.12)

  • Permitting Track: As-of-Right in designated single-family zones; Staff sign-off

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of primary dwelling footprint

  • Operational Rules: Owner-occupancy required; Single-family architectural character maintained

  • Infrastructure Review: City Sewer / Bristol-Burlington Health District B100a septic review

Burlington Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § IV.B.6)

  • Permitting Track: Special Permit (P&Z Public Hearing required)

  • Allowed Typologies: Attached permitted; Detached allowed on minimum 2-acre residential parcels

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal structure

  • Operational Rules: Strict owner-occupancy covenant; Short-term rentals prohibited

  • Infrastructure Review: Bristol-Burlington Health District B100a septic review (100% private wells/septic)

Canton Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 470-501 & § 470-7.3)

  • Permitting Track: As-of-Right for attached; Site Plan review for detached conversions

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of primary dwelling gross area

  • Operational Rules: Primary residence must be owner-occupied; Annual registration required

  • Infrastructure Review: Farmington Valley Health District (FVHD) B100a review or Canton WPCA

East Granby Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § III.C)

  • Permitting Track: Special Permit (P&Z Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 25% of principal residence

  • Operational Rules: Owner must reside on premises; Deed restriction filed on land records

  • Infrastructure Review: Farmington Valley Health District (FVHD) septic clearance

East Hartford Zoning Regulations | Hartford County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29)

  • Permitting Track: As-of-Right (Administrative Staff Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of principal structure

  • Operational Rules: Off-street parking space capped at 1; Standard building code compliance

  • Infrastructure Review: MDC Public Sewer connection mandatory

East Windsor Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 502)

  • Permitting Track: Administrative Review for attached; Special Use Permit for detached outbuildings

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of primary living space

  • Operational Rules: Owner-occupancy required; Notice filed on municipal land records

  • Infrastructure Review: East Windsor WPCA or North Central District Health Department septic review

Enfield Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.30)

  • Permitting Track: As-of-Right (Administrative Review by Planning Department)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of main building footprint

  • Operational Rules: Owner-occupancy required; Long-term rental agreements only

  • Infrastructure Review: Enfield WPCA Public Sewer or North Central District Health Department

Farmington Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations Article II, § 27 / Effective 2024–2026 Standards)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Permit for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of main residence (whichever is less)

  • Operational Rules: Owner must occupy principal or accessory dwelling; STRs prohibited

  • Infrastructure Review: Farmington WPCA or Farmington Valley Health District (FVHD) B100a review

Glastonbury Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Building Zone Regulations § 6.8)

  • Permitting Track: Staff Review for internal/attached; Special Permit for detached accessory structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 35% of total finished living area

  • Operational Rules: Strict owner-occupancy covenant; Deed notice required; Short-term rentals prohibited

  • Infrastructure Review: Town WPCA Sewer or Glastonbury Health Department B100a septic review

Granby Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 8.1.14)

  • Permitting Track: Staff Approval for attached; Special Permit for detached carriage conversions

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of gross floor area

  • Operational Rules: Owner must reside on-site; Standard deed restriction filed

  • Infrastructure Review: Farmington Valley Health District (FVHD) B100a septic review

Hartford Zoning Regulations | Hartford County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / City Zoning Code Chapter 3)

  • Permitting Track: As-of-Right (Administrative Staff Review via Accela Portal)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of principal structure

  • Operational Rules: No owner-occupancy deed restriction mandated; Standard city occupancy limits apply

  • Infrastructure Review: MDC Public Water and Public Sewer connection required

Hartland Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations Article V)

  • Permitting Track: Special Permit (P&Z Public Hearing required)

  • Allowed Typologies: Attached permitted; Detached restricted to large-acreage parcels

  • Dimensional Caps: Max 800 sq ft or 25% of principal residence

  • Operational Rules: Owner-occupancy required; Deed covenant recorded; Commercial/STR use prohibited

  • Infrastructure Review: Farmington Valley Health District B100a septic clearance (100% private wells/septic)

Manchester Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § Article IV, § 11)

  • Permitting Track: As-of-Right (Staff Administrative Review)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of gross floor area

  • Operational Rules: Owner-occupancy required; 1 dedicated parking space required

  • Infrastructure Review: Manchester Water and Sewer Department public connection

Marlborough Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations Article Three / eCode360 § MA3220)

  • Permitting Track: Special Permit (P&Z Commission Approval)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of principal structure

  • Operational Rules: Owner must occupy principal or accessory dwelling; STRs prohibited

  • Infrastructure Review: Chatham Health District B100a septic review (100% private wells and septic)

New Britain Zoning Regulations | Hartford County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29)

  • Permitting Track: As-of-Right (City Planning & Development Staff Review)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Standard 1-space parking requirement; City building and fire code compliance

  • Infrastructure Review: New Britain Public Works / Water & Sewer Department connection

Newington Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.3 / § 3.7)

  • Permitting Track: Administrative Review for conforming attached; Special Permit for exterior conversions

  • Allowed Typologies: Attached permitted; Detached permitted with zone-specific setbacks

  • Dimensional Caps: Max 800 sq ft or 30% of principal dwelling area

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on land records

  • Infrastructure Review: MDC Sewer connection or Central CT Health District septic approval

Plainville Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 1.03 & § 2.04)

  • Permitting Track: As-of-Right (Staff Administrative Review)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of principal structure

  • Operational Rules: Primary residence must be owner-occupied; Long-term rental agreements only

  • Infrastructure Review: Plainville WPCA public sewer connection or Plainville-Southington Health District

Rocky Hill Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.2 / eCode360 § 145)

  • Permitting Track: Staff Review for internal footprint; Special Permit for detached accessory structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of primary dwelling

  • Operational Rules: Owner-occupancy strictly enforced; Recorded deed covenant mandatory

  • Infrastructure Review: MDC Public Sewer connection or Central CT Health District septic approval

Simsbury Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.5 & Short-Term Rental Ordinance)

  • Permitting Track: As-of-Right for conforming attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary floor area (whichever is less)

  • Operational Rules: Owner must reside on-site; STR permitted only if registered under town ordinance

  • Infrastructure Review: Simsbury WPCA or Farmington Valley Health District (FVHD) B100a review

South Windsor Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.2.3)

  • Permitting Track: As-of-Right by Zoning Permit (Planning Department Staff Review)

  • Allowed Typologies: Attached and Detached permitted (specific architectural compatibility required)

  • Dimensional Caps: Max 1,000 sq ft or 35% of principal dwelling

  • Operational Rules: Owner-occupancy required; Recorded deed restriction; Short-term rentals prohibited

  • Infrastructure Review: South Windsor WPCA or Town Health Department B100a review

Southington Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3-01.28 & § 11-16)

  • Permitting Track: Special Permit (P&Z Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of living area

  • Operational Rules: Owner-occupancy mandatory; Deed covenant recorded; 1 off-street parking space

  • Infrastructure Review: Southington WPCA Sewer or Southington Health Department B100a review

Suffield Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § V.Special Regulations)

  • Permitting Track: Staff Approval for internal attached; Special Permit for detached carriage barns

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal structure

  • Operational Rules: Owner must reside in primary dwelling; Annual certification affidavit

  • Infrastructure Review: North Central District Health Department B100a septic review

West Hartford Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Code § 177 / Adopted ADU Regulations)

  • Permitting Track: As-of-Right (Town Planner / Zoning Enforcement Officer Review)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 35% of principal dwelling gross floor area

  • Operational Rules: Owner must reside on premises; Recorded deed covenant; STRs strictly regulated

  • Infrastructure Review: MDC Public Water & MDC Public Sewer connection required

Wethersfield Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Code Chapter 167A / Zoning Regulations § 5.2)

  • Permitting Track: As-of-Right for conforming attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 25% of principal residence

  • Operational Rules: Owner-occupancy required; Single-family residential character maintained

  • Infrastructure Review: MDC Public Sewer connection required

Windsor Zoning Regulations | Hartford County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.4.1 & § 5.2)

  • Permitting Track: Administrative Staff Review for attached; Special Use for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of total livable space

  • Operational Rules: Owner-occupancy mandatory; Deed covenant recorded on land records

  • Infrastructure Review: MDC Public Sewer or Town Health Department B100a septic review

Windsor Locks Zoning Regulations | Hartford County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / eCode360 Chapter 125/155)

  • Permitting Track: As-of-Right (Building & Zoning Department Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Max 1 dedicated off-street parking space; Airport overlay height restrictions apply

  • Infrastructure Review: Windsor Locks WPCA Public Sewer connection required

Litchfield County

Barkhamsted Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 193-12)

  • Permitting Track: As-of-Right for internal conversions; Special Exception for detached units

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of principal structure

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on land records; STRs prohibited

  • Infrastructure Review: Farmington Valley Health District (FVHD) B100a septic approval (100% private septic/wells)

Bethlehem Land Use Regulations | Litchfield County

  • Regulatory Status: No Local Municipal Zoning (One of CT’s non-zoned towns; governed by State Building & Public Health Code)

  • Permitting Track: As-of-Right via Local Building Official & Sanitarian Review

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Governed by lot coverage, setbacks, and Building Code structural parameters

  • Operational Rules: Multi-family/accessory structures allowed adhering to environmental and health mandates

  • Infrastructure Review: Torrington Area Health District (TAHD) B100a septic review (100% private wells and septic)

Bridgewater Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.6)

  • Permitting Track: Special Permit (Planning & Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary residence floor area

  • Operational Rules: Owner must reside on premises; Recorded deed covenant mandatory; STRs restricted

  • Infrastructure Review: Housatonic Valley Health District (HVHD) B100a septic clearance (100% private septic)

Canaan (Falls Village) Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.2 / Residential Zones)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Permit for detached outbuildings

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of principal structure

  • Operational Rules: Single-family architectural appearance required; Owner-occupancy required

  • Infrastructure Review: Torrington Area Health District (TAHD) B100a septic review or municipal sewer in village center

Colebrook Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Code & Zoning Provisions § 43/59)

  • Permitting Track: Staff Administrative Review for attached; Special Permit for detached accessory barns

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of main residence

  • Operational Rules: Owner-occupancy mandatory; Annual certification affidavit; STRs barred

  • Infrastructure Review: Farmington Valley Health District (FVHD) B100a septic clearance (100% private septic/wells)

Cornwall Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations Article 10 / § 10.1 Accessory Apartments)

  • Permitting Track: Staff Review for internal units; Special Permit (P&Z Hearing) for detached units

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of principal living area

  • Operational Rules: Owner-occupancy strictly required; Deed covenant recorded; Housatonic River Overlay standards apply

  • Infrastructure Review: Torrington Area Health District (TAHD) B100a septic review (100% private wells and septic)

Goshen Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.6 & § 5.2)

  • Permitting Track: Staff Approval for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of primary structure

  • Operational Rules: Owner must reside on-site; Woodridge Lake watershed overlay restrictions apply

  • Infrastructure Review: Torrington Area Health District (TAHD) B100a septic review or Woodridge Lake Sewer District

Harwinton Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.3 & § 5.1)

  • Permitting Track: Administrative for internal alterations; Special Permit for exterior detached additions

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of main residence floor area

  • Operational Rules: Owner-occupancy required; Recorded deed covenant mandatory

  • Infrastructure Review: Torrington Area Health District (TAHD) B100a septic approval (100% private septic/wells)

Kent Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.2.3 & § 7.3)

  • Permitting Track: Administrative Review for attached; Special Permit for detached accessory structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 35% of principal dwelling

  • Operational Rules: Strict owner-occupancy covenant; Deed restriction filed on land records; STRs prohibited in ADUs

  • Infrastructure Review: Kent Sewer Commission connection or Torrington Area Health District (TAHD) B100a review

Litchfield Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.1 & § 6.2)

  • Permitting Track: As-of-Right for attached; Special Exception (P&Z Public Hearing) for detached units

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal structure

  • Operational Rules: Owner-occupancy required in primary dwelling; Historic District Commission approval required in Borough

  • Infrastructure Review: Litchfield WPCA Sewer or Torrington Area Health District (TAHD) B100a septic review

Morris Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 5.2 / Special Exception Provisions)

  • Permitting Track: Special Exception (Planning & Zoning Commission Approval required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of main residence

  • Operational Rules: Primary residence must be owner-occupied; Bantam Lake watershed environmental setbacks apply

  • Infrastructure Review: Torrington Area Health District (TAHD) B100a septic review (100% private wells and septic)

New Hartford Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.5 & Design Guidelines)

  • Permitting Track: As-of-Right (Administrative Staff Review) for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of gross floor area

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on land records

  • Infrastructure Review: Farmington Valley Health District (FVHD) B100a review or New Hartford WPCA

New Milford Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations Chapter 105 / Accessory Apartment Standards)

  • Permitting Track: Staff Review for internal attached; Special Permit & Site Plan for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal dwelling area

  • Operational Rules: Owner-occupancy mandatory; Health Authority Verification Form required; STRs restricted

  • Infrastructure Review: New Milford WPCA Public Sewer or Town Health Department B100a septic clearance

Norfolk Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.3 & § 6.1)

  • Permitting Track: Special Permit (P&Z Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 25% of principal residence

  • Operational Rules: Owner must reside on premises; Single-family character preserved; Deed notice required

  • Infrastructure Review: Norfolk Sewer District or Torrington Area Health District (TAHD) B100a septic review

North Canaan Zoning Regulations | Litchfield County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29)

  • Permitting Track: As-of-Right (Administrative Staff Review via OpenGov Portal)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: 1 off-street parking space required; Standard building code compliance

  • Infrastructure Review: North Canaan WPCA Public Sewer or Torrington Area Health District (TAHD) review

Plymouth Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Planning & Zoning Regulations Article 2 / Residential Standards)

  • Permitting Track: As-of-Right by Zoning Permit for conforming attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of primary living area

  • Operational Rules: Owner-occupancy required; Certified A-2 plot plan required with permit application

  • Infrastructure Review: Plymouth WPCA Public Sewer or Torrington Area Health District (TAHD) B100a review

Roxbury Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 5.3 / 2026 Code Update)

  • Permitting Track: Special Permit (Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of principal structure

  • Operational Rules: Strict owner-occupancy covenant; Recorded deed restriction; Short-Term Rental permit required

  • Infrastructure Review: Torrington Area Health District (TAHD) B100a septic review (100% private wells and septic)

Salisbury Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 204 & § 702)

  • Permitting Track: Administrative Zoning Permit for internal attached; Special Permit for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal structure

  • Operational Rules: Owner-occupancy required; Historic District review applies within village centers

  • Infrastructure Review: Salisbury Sewer Commission or Torrington Area Health District (TAHD) B100a review

Sharon Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations Article IV)

  • Permitting Track: Special Permit (Planning & Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of principal living area

  • Operational Rules: Strict owner-occupancy mandate; Commercial/STR leasing prohibited

  • Infrastructure Review: Sharon Sewer District or Torrington Area Health District (TAHD) B100a septic review

Thomaston Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.2 & § 5.1)

  • Permitting Track: As-of-Right for conforming attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of primary floor area

  • Operational Rules: Owner-occupancy required; Recorded deed covenant on land records

  • Infrastructure Review: Thomaston WPCA Public Sewer or Torrington Area Health District (TAHD) review

Torrington Zoning Regulations

  • Regulatory Status: Opted Out (City Zoning Regulations § 3.1 & § 5.16)

  • Permitting Track: As-of-Right (Administrative Staff Review) for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of primary residence

  • Operational Rules: Owner-occupancy required; 1 off-street parking space mandated

  • Infrastructure Review: Torrington WPCA Public Sewer or Torrington Area Health District (TAHD) review

Warren Zoning Regulations

  • Regulatory Status: Opted Out (Town Zoning Regulations § 6.1 / Adopted Standards)

  • Permitting Track: Special Permit (Planning & Zoning Commission Approval required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of principal dwelling

  • Operational Rules: Owner-occupancy strictly enforced; Lake Waramaug Authority overlay setbacks apply

  • Infrastructure Review: Torrington Area Health District (TAHD) B100a septic review (100% private wells/septic)

Washington Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 13.11 / Adopted 2025–2026 Code)

  • Permitting Track: Special Permit via Online Permitting Portal (Zoning Commission Public Hearing)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 35% of total finished living area

  • Operational Rules: Strict owner-occupancy mandate; Deed covenant filed on land records; STRs prohibited

  • Infrastructure Review: Torrington Area Health District (TAHD) B100a septic review (100% private wells and septic)

Watertown Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 5.1 / Adopted Code Update)

  • Permitting Track: As-of-Right with ADU Fillable Affidavit for attached; Special Permit for detached on parcels over 6 acres

  • Allowed Typologies: Attached permitted; Detached restricted to large-acreage parcels

  • Dimensional Caps: Max 900 sq ft or 30% of primary residence

  • Operational Rules: Owner-occupancy required; ADU Affidavit recorded on land records

  • Infrastructure Review: Watertown Water & Sewer Authority connection or TAHD septic review

Winchester (Winsted) Zoning Regulations | Litchfield County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29)

  • Permitting Track: As-of-Right (Planning & Community Development Staff Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: 1 off-street parking space required; Highland Lake watershed overlay rules apply

  • Infrastructure Review: Winchester WPCA Public Sewer or Torrington Area Health District (TAHD) review

Woodbury Zoning Regulations | Litchfield County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.2 / Adopted Accessory Apartment Code)

  • Permitting Track: Administrative Staff Review for attached; Special Permit (Zoning Commission) for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal dwelling area

  • Operational Rules: Owner must occupy principal or accessory unit; Historic Main Street overlay rules apply

  • Infrastructure Review: Woodbury WPCA or Torrington Area Health District (TAHD) B100a septic review

Middlesex County (All 15 Municipalities Complete Directory)

Chester Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 40.5 / § 140-40)

  • Permitting Track: Staff Administrative Review for conforming attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of principal dwelling area

  • Operational Rules: Owner-occupancy required; Recorded deed covenant mandatory; Short-term rentals prohibited

  • Infrastructure Review: Connecticut River Area Health District (CRAHD) B100a septic review (100% private wells and septic)

Clinton Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 27.2.55)

  • Permitting Track: As-of-Right for internal conversions; Special Exception for detached carriage structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of primary residence floor area

  • Operational Rules: Primary residence must be owner-occupied; Coastal Area Management (CAM) review where applicable

  • Infrastructure Review: Connecticut River Area Health District (CRAHD) B100a septic review or municipal sewer

Cromwell Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.2 / § 5.3)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Permit for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of principal structure

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on land records

  • Infrastructure Review: Cromwell WPCA Public Sewer connection or Central CT Health District septic approval

Deep River Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.10)

  • Permitting Track: Administrative Review for internal conversions; Special Permit for detached outbuildings

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of main residence

  • Operational Rules: Owner must reside on premises; Single-family architectural character maintained

  • Infrastructure Review: Connecticut River Area Health District (CRAHD) B100a septic review or municipal sewer

Durham Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 12.05)

  • Permitting Track: Special Permit (Planning & Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached permitted; Detached permitted with minimum lot size standards

  • Dimensional Caps: Max 900 sq ft or 33% of principal dwelling

  • Operational Rules: Strict owner-occupancy covenant; Short-term rentals prohibited in accessory units

  • Infrastructure Review: Town Health Department B100a septic review (100% private wells and septic)

East Haddam Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 93 / Adopted 2024–2026 Standards)

  • Permitting Track: Staff Administrative Review for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 35% of principal dwelling finished floor area

  • Operational Rules: Owner-occupancy required; Recorded deed covenant; Agricultural overlay allowances apply

  • Infrastructure Review: Chatham Health District B100a septic review (100% private wells and septic)

East Hampton Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 8.4)

  • Permitting Track: As-of-Right for conforming attached; Special Permit for detached units

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of primary residence

  • Operational Rules: Owner must reside on-site; Lake Pocotopaug Watershed Protection Overlay standards apply

  • Infrastructure Review: Chatham Health District B100a septic clearance or East Hampton WPCA

Essex Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 40C & § 120)

  • Permitting Track: Staff Review for internal footprint; Special Exception (P&Z Commission) for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of principal structure

  • Operational Rules: Strict owner-occupancy mandate; Deed restriction recorded; STRs restricted

  • Infrastructure Review: Connecticut River Area Health District (CRAHD) B100a septic review (100% private septic)

Haddam Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.3 & § 7.2)

  • Permitting Track: As-of-Right (Administrative Review) for attached; Special Permit for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of primary living space

  • Operational Rules: Owner-occupancy required; CT River Gateway Conservation Zone standards apply

  • Infrastructure Review: Connecticut River Area Health District (CRAHD) B100a septic review

Killingworth Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 500-43 & § 500-60)

  • Permitting Track: Special Exception (Planning & Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of main residence

  • Operational Rules: Strict owner-occupancy mandate; Minimum 2-acre residential lot baseline

  • Infrastructure Review: Connecticut River Area Health District (CRAHD) B100a septic review (100% private septic)

Middlefield Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.04 / Updates Effective 2023–2026)

  • Permitting Track: As-of-Right for conforming attached; Special Permit for detached structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of primary floor area

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on land records

  • Infrastructure Review: Middlefield Health Department B100a septic review or municipal sewer

Middletown Zoning Regulations | Middlesex County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / City Zoning Code § 60)

  • Permitting Track: As-of-Right (Land Use Department Administrative Staff Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of principal structure

  • Operational Rules: Max 1 dedicated off-street parking space; City building and fire code compliance

  • Infrastructure Review: Middletown Water & Sewer Department public connection or City Health review

Old Saybrook Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 53.1 & § 68)

  • Permitting Track: Staff Review for internal footprint; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of principal residence

  • Operational Rules: Owner-occupancy required; Coastal Area Management (CAM) overlay review where applicable

  • Infrastructure Review: Connecticut River Area Health District (CRAHD) B100a septic review

Portland Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations Article 6 / § 6.2)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of gross floor area

  • Operational Rules: Primary residence must be owner-occupied; Annual certification affidavit

  • Infrastructure Review: Portland WPCA Public Sewer or Chatham Health District septic approval

Westbrook Zoning Regulations | Middlesex County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.3 & § 5.2)

  • Permitting Track: Staff Review for attached; Special Permit for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of primary living area

  • Operational Rules: Owner-occupancy required; Coastal Area Management (CAM) review for shoreline parcels

  • Infrastructure Review: Connecticut River Area Health District (CRAHD) B100a septic review

New Haven County

Ansonia Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (City Zoning Regulations § 330.14)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of principal dwelling area

  • Operational Rules: Owner-occupancy required in principal or accessory unit; 1 off-street parking space

  • Infrastructure Review: Ansonia WPCA Public Sewer connection or Naugatuck Valley Health District (NVHD) review

Beacon Falls Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 24 / eCode360 Chapter 222)

  • Permitting Track: Staff Administrative Review for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of main residence floor area

  • Operational Rules: Primary residence must be owner-occupied; Recorded deed restriction on land records

  • Infrastructure Review: Naugatuck Valley Health District (NVHD) B100a septic review or municipal sewer

Bethany Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.3 & § 7.4)

  • Permitting Track: Special Exception (Planning and Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted on qualifying residential parcels

  • Dimensional Caps: Max 900 sq ft or 30% of primary living space

  • Operational Rules: Strict owner-occupancy covenant; Short-term rentals prohibited in accessory units

  • Infrastructure Review: Quinnipiack Valley Health District (QVHD) B100a septic review (100% private wells/septic)

Branford Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 5.4 / § 380)

  • Permitting Track: As-of-Right (Staff Review) for internal attached; Special Exception for detached carriage structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal dwelling gross area

  • Operational Rules: Owner-occupancy required; Coastal Area Management (CAM) review for shoreline parcels

  • Infrastructure Review: Town WPCA Sewer or East Shore District Health Department (ESDHD) B100a review

Cheshire Zoning Regulations | New Haven County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / Local Code § 44)

  • Permitting Track: As-of-Right (Staff Administrative Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Max 1 dedicated off-street parking space; Design compatibility review

  • Infrastructure Review: Cheshire WPCA Public Sewer or Chesprocott Health District B100a septic review

Derby Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (City Zoning Regulations § 195-24 / Updated Code)

  • Permitting Track: As-of-Right for internal footprint conversions; Special Exception for detached additions

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of main residence

  • Operational Rules: Owner-occupancy required; Recorded deed covenant mandatory

  • Infrastructure Review: Derby WPCA Public Sewer connection or Naugatuck Valley Health District (NVHD) review

East Haven Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 25.4 & § 31)

  • Permitting Track: Staff Administrative Review for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of principal structure

  • Operational Rules: Owner must reside on premises; Recorded deed restriction on land records

  • Infrastructure Review: East Haven WPCA Public Sewer or East Shore District Health Department (ESDHD) review

Guilford Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 273-19 / § 7.9)

  • Permitting Track: Staff Review for attached; Special Permit (P&Z Public Hearing) for detached units

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of principal finished living area

  • Operational Rules: Strict owner-occupancy covenant; Recorded deed restriction; STRs prohibited

  • Infrastructure Review: East Shore District Health Department (ESDHD) B100a septic review (private septic/wells)

Hamden Zoning Regulations | New Haven County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / Town Code § 500)

  • Permitting Track: As-of-Right (Administrative Staff Review)

  • Allowed Typologies: Attached and Detached units permitted in single-family residential zones

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Capped at 1 off-street parking space; Standard municipal compliance

  • Infrastructure Review: Greater New Haven WPCA (GNHWPCA) or Quinnipiack Valley Health District (QVHD)

Madison Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 29.2 & § 31.1)

  • Permitting Track: Staff Review for attached; Special Exception (P&Z Commission) for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of principal residence

  • Operational Rules: Strict owner-occupancy mandate; Deed covenant recorded; Coastal environmental review applies

  • Infrastructure Review: Madison Health Department B100a septic review (100% private septic systems)

Meriden Zoning Regulations | New Haven County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / City Code § 213)

  • Permitting Track: As-of-Right (Planning Division Administrative Staff Review)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Max 1 dedicated off-street parking space; Standard city building and fire codes

  • Infrastructure Review: Meriden Public Utilities Water & Sewer connection required

Middlebury Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 31.4 & § 52)

  • Permitting Track: Special Exception (Planning & Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of main residence floor area

  • Operational Rules: Owner-occupancy strictly required; Deed covenant recorded on town land records

  • Infrastructure Review: Pomperaug District Department of Health (PDDH) B100a septic review or municipal sewer

Milford Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (City Zoning Regulations § 5.1.4 / Adopted Standards)

  • Permitting Track: As-of-Right (Administrative Staff Review) for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of primary living space

  • Operational Rules: Owner-occupancy required; No additional parking required per city code; STRs restricted

  • Infrastructure Review: Milford WPCA Public Sewer connection or City Health Department review

Naugatuck Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Borough Zoning Regulations § 24.3 & § 25)

  • Permitting Track: Staff Administrative Review for attached; Special Permit for detached outbuildings

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of principal structure

  • Operational Rules: Owner must reside on premises; Recorded deed restriction on land records

  • Infrastructure Review: Naugatuck WPCA Public Sewer or Naugatuck Valley Health District (NVHD) review

New Haven Zoning Regulations | New Haven County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / City Zoning Ordinance § 42)

  • Permitting Track: As-of-Right (City Plan Commission Staff Review)

  • Allowed Typologies: Attached and Detached units permitted (higher-density urban infill supported)

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Zero or 1 off-street parking mandate; No owner-occupancy deed restriction mandated

  • Infrastructure Review: Greater New Haven WPCA (GNHWPCA) Public Sewer connection mandatory

North Branford Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 24.2 & § 41)

  • Permitting Track: Staff Review for attached; Special Permit (P&Z Hearing) for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of primary residence

  • Operational Rules: Owner-occupancy required; Annual certification affidavit; STRs prohibited

  • Infrastructure Review: East Shore District Health Department (ESDHD) B100a septic review

North Haven Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 5.1.3)

  • Permitting Track: As-of-Right for conforming attached; Special Permit for detached structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of principal structure

  • Operational Rules: Owner must occupy principal or accessory unit; Deed covenant recorded

  • Infrastructure Review: North Haven WPCA Sewer or Quinnipiack Valley Health District (QVHD) septic review

Orange Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Plan & Zoning Regulations § 383-14 / § 383-28)

  • Permitting Track: Special Permit (Town Plan & Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached permitted; Detached strictly limited to qualifying large parcels

  • Dimensional Caps: Max 800 sq ft or 25% of principal residence

  • Operational Rules: Strict owner-occupancy covenant; Commercial and short-term leasing prohibited

  • Infrastructure Review: Orange Health Department B100a septic review (100% private septic systems)

Oxford Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations Article 5 / § 5.3)

  • Permitting Track: Special Exception (Planning & Zoning Commission Approval required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of gross living area

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on town land records

  • Infrastructure Review: Pomperaug District Department of Health (PDDH) B100a septic review (100% private septic)

Prospect Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.2.4 & § 4.1)

  • Permitting Track: Special Permit (P&Z Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of main residence

  • Operational Rules: Strict owner-occupancy mandate; Deed covenant filed on land records

  • Infrastructure Review: Chesprocott Health District B100a septic review (100% private wells and septic)

Seymour Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 6.3 & § 12)

  • Permitting Track: Staff Administrative Review for attached; Special Permit for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of primary dwelling

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on land records

  • Infrastructure Review: Seymour WPCA Public Sewer or Naugatuck Valley Health District (NVHD) review

Southbury Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.2 & § 7.2)

  • Permitting Track: Administrative Review for internal attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal structure

  • Operational Rules: Owner must reside on premises; Recorded deed covenant; Heritage Village overlay exempt

  • Infrastructure Review: Pomperaug District Department of Health (PDDH) B100a septic review

Wallingford Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.1.B & § 6.2)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Permit for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of primary residence

  • Operational Rules: Primary residence must be owner-occupied; Annual registration required

  • Infrastructure Review: Wallingford Public Utilities Public Sewer or Town Health Department review

Waterbury Zoning Regulations | New Haven County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / City Zoning Code Article 4)

  • Permitting Track: As-of-Right (City Planning Bureau Administrative Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: 1 off-street parking space required; Standard building/fire code compliance

  • Infrastructure Review: Waterbury WPCA Public Sewer connection mandatory

West Haven Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (City Zoning Regulations § 42.2)

  • Permitting Track: As-of-Right for conforming attached; Special Permit for detached outbuildings

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of principal structure

  • Operational Rules: Owner-occupancy required; Single-family residential character preserved

  • Infrastructure Review: West Haven WPCA Public Sewer connection required

Wolcott Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 24.5 & § 32)

  • Permitting Track: Special Permit (Planning & Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of living area

  • Operational Rules: Owner-occupancy mandatory; Recorded deed restriction on land records

  • Infrastructure Review: Chesprocott Health District B100a septic review (100% private wells and septic)

Woodbridge Zoning Regulations | New Haven County

  • Regulatory Status: Opted Out (Town Plan & Zoning Regulations § 3.3 & § 5.2)

  • Permitting Track: Special Permit (TPZC Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted on qualifying acreage

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal dwelling area

  • Operational Rules: Strict owner-occupancy covenant; Deed restriction recorded; STRs prohibited

  • Infrastructure Review: Quinnipiack Valley Health District (QVHD) B100a septic review (100% private septic)

New London County

Bozrah Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.2 & § 12)

  • Permitting Track: As-of-Right for conforming attached; Special Permit for detached outbuildings

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of principal dwelling area

  • Operational Rules: Owner-occupancy required; Recorded deed covenant mandatory; Short-term rentals restricted

  • Infrastructure Review: Uncas Health District B100a septic review (100% private wells and septic)

Colchester Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 8.3 / eCode360 § CO1811)

  • Permitting Track: Staff Administrative Review for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of primary residence gross living area

  • Operational Rules: Owner must reside in primary or accessory dwelling; Annual registration required

  • Infrastructure Review: Chatham Health District B100a septic review or Colchester WPCA sewer connection

East Lyme Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 20.20 & § 25)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Permit for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of principal structure livable space

  • Operational Rules: Owner-occupancy required; Coastal Area Management (CAM) review where applicable; STRs restricted

  • Infrastructure Review: East Lyme WPCA Public Sewer or Ledge Light Health District (LLHD) septic approval

Franklin Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.4 & § 4.2)

  • Permitting Track: Special Exception (Planning & Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted on qualifying acreage

  • Dimensional Caps: Max 800 sq ft or 25% of principal residence

  • Operational Rules: Strict owner-occupancy covenant; Commercial and short-term leasing prohibited

  • Infrastructure Review: Uncas Health District B100a septic clearance (100% private wells and septic)

Griswold Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.1.8 / § 6.2)

  • Permitting Track: As-of-Right for internal conversions; Special Permit for detached carriage barns

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of main residence

  • Operational Rules: Owner-occupancy required; Recorded deed covenant on town land records

  • Infrastructure Review: Uncas Health District B100a septic review or Griswold WPCA

Groton Zoning Regulations | New London County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / Town Code § 4.1)

  • Permitting Track: As-of-Right (Planning & Development Services Administrative Staff Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Capped at 1 dedicated off-street parking space; Coastal Area Management (CAM) overlay applies

  • Infrastructure Review: Groton Utilities Public Sewer/Water or Ledge Light Health District review

Lebanon Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.2.b & § 8.3)

  • Permitting Track: Staff Review for attached; Special Permit (P&Z Public Hearing) for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal finished living area

  • Operational Rules: Owner-occupancy required; Agricultural zone overlay setbacks apply; STRs restricted

  • Infrastructure Review: Uncas Health District B100a septic review (100% private wells and septic)

Ledyard Zoning Regulations

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.2 & § 8.4)

  • Permitting Track: As-of-Right (Administrative Staff Review) for attached; Special Permit for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of primary residence

  • Operational Rules: Owner must reside on-site; Recorded deed restriction required

  • Infrastructure Review: Ledge Light Health District (LLHD) B100a septic review or municipal sewer

Lisbon Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 10.4 & § 11.5)

  • Permitting Track: Special Permit (Planning & Zoning Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of main residence floor area

  • Operational Rules: Strict owner-occupancy mandate; Deed covenant filed on municipal land records

  • Infrastructure Review: Uncas Health District B100a septic clearance (100% private wells and septic)

Lyme Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.3 & § 7.1)

  • Permitting Track: Special Permit (P&Z Commission Public Hearing required)

  • Allowed Typologies: Attached and Detached permitted on qualifying parcels

  • Dimensional Caps: Max 1,000 sq ft or 30% of principal structure

  • Operational Rules: Strict owner-occupancy covenant; Recorded deed covenant; Short-term rentals prohibited

  • Infrastructure Review: Ledge Light Health District (LLHD) B100a septic review (100% private septic/wells)

Montville Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.14 / Chapter 146)

  • Permitting Track: As-of-Right for conforming attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of principal dwelling

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on land records

  • Infrastructure Review: Montville WPCA Public Sewer or Uncas Health District B100a septic review

New London Zoning Regulations | New London County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / City Zoning Code § 400)

  • Permitting Track: As-of-Right (Planning & Zoning Division Administrative Staff Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Max 1 off-street parking space; City building and historic district guidelines apply

  • Infrastructure Review: New London Public Utilities WPCA Public Sewer connection mandatory

North Stonington Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 1002 / Chapter 10)

  • Permitting Track: Staff Administrative Review for attached; Special Permit for detached accessory structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 35% of principal dwelling area

  • Operational Rules: Owner must occupy principal or accessory unit; Deed covenant recorded

  • Infrastructure Review: Ledge Light Health District (LLHD) B100a septic review (100% private wells and septic)

Norwich Zoning Regulations | New London County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / Adopted 2025–2026 Code)

  • Permitting Track: As-of-Right (Department of Planning & Neighborhood Services Staff Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Max 1 off-street parking space; Standard city building and fire safety compliance

  • Infrastructure Review: Norwich Public Utilities (NPU) Public Sewer/Water connection or Uncas Health review

Old Lyme Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.18 & § 8.2)

  • Permitting Track: Administrative Staff Review for attached; Special Permit (Zoning Commission) for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of gross floor area

  • Operational Rules: Strict owner-occupancy mandate; Recorded deed covenant; Coastal management reviews apply

  • Infrastructure Review: Ledge Light Health District (LLHD) B100a septic review (100% private septic systems)

Preston Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 15.3 / Amendments Effective 2025–2026)

  • Permitting Track: As-of-Right for conforming attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of principal structure

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on municipal land records

  • Infrastructure Review: Uncas Health District B100a septic clearance (100% private wells and septic)

Salem Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.24 & § 11)

  • Permitting Track: Staff Review for internal footprint; Special Exception for detached structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of principal living area

  • Operational Rules: Owner must reside on premises; Recorded deed covenant mandatory

  • Infrastructure Review: Uncas Health District B100a septic review (100% private wells and septic)

Sprague Zoning Regulations

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29)

  • Permitting Track: As-of-Right (Zoning Enforcement Officer Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: 1 off-street parking space mandated; Village district architectural standards apply

  • Infrastructure Review: Sprague Water & Sewer Authority connection or Uncas Health District review

Stonington Zoning Regulations

  • Regulatory Status: Opted Out (Town Zoning Regulations § 2.4 & § 6.6 / Adopted 2026 Standards)

  • Permitting Track: As-of-Right (Staff Review) for attached; Special Use for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of principal residence floor area

  • Operational Rules: Owner-occupancy required; Coastal Area Management (CAM) review for coastal parcels

  • Infrastructure Review: Stonington WPCA Public Sewer or Ledge Light Health District review

Voluntown Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations Section 2 & § 5.3 / 2024–2026 Code)

  • Permitting Track: As-of-Right for conforming attached; Special Permit for detached carriage units

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of principal structure living space

  • Operational Rules: Owner-occupancy required; Deed covenant recorded; STRs prohibited

  • Infrastructure Review: Uncas Health District B100a septic review (100% private wells and septic)

Waterford Zoning Regulations | New London County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.2.4 & § 25)

  • Permitting Track: Staff Administrative Review for attached; Special Permit for detached outbuildings

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal finished living area

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on municipal land records; CAM review applies

  • Infrastructure Review: Waterford WPCA Public Sewer or Ledge Light Health District (LLHD) review

Tolland County

Andover Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.12 & Chapter 11)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Permit for detached units

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of principal structure living area

  • Operational Rules: Owner-occupancy required; Recorded deed covenant on municipal land records; STRs restricted

  • Infrastructure Review: Eastern Highlands Health District (EHHD) B100a septic review (100% private wells and septic)

Bolton Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.2 & § 16)

  • Permitting Track: Staff Administrative Review via OpenGov for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of main residence floor area

  • Operational Rules: Owner must reside on premises; Recorded deed restriction on land records

  • Infrastructure Review: Eastern Highlands Health District (EHHD) B100a septic review or municipal sewer

Columbia Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 8.4 / Section 21)

  • Permitting Track: As-of-Right for conforming attached; Special Permit (P&Z Hearing) for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of primary dwelling gross area

  • Operational Rules: Owner-occupancy strictly required; Deed restriction filed on land records; STRs prohibited

  • Infrastructure Review: Eastern Highlands Health District (EHHD) B100a septic review

Coventry Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.04 & § 6.02)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Permit for detached carriage barns

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal finished living area

  • Operational Rules: Owner-occupancy required; Coventry Lake watershed overlay environmental reviews apply

  • Infrastructure Review: Eastern Highlands Health District (EHHD) B100a septic review or Coventry WPCA

Ellington Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.2.1 & § 7.15)

  • Permitting Track: Staff Approval for internal/attached; Special Permit for detached accessory structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of principal structure

  • Operational Rules: Owner-occupancy mandatory; Annual registration affidavit required

  • Infrastructure Review: North Central District Health Department (NCDHD) B100a review or Ellington WPCA

Hebron Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.3 & § 5.8)

  • Permitting Track: As-of-Right for conforming attached; Special Exception (P&Z Public Hearing) for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of primary living space

  • Operational Rules: Strict owner-occupancy covenant; Deed covenant recorded; STRs restricted

  • Infrastructure Review: Chatham Health District B100a septic review or Town WPCA sewer connection

Mansfield Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Zoning Regulations Article 8 & Article 2)

  • Permitting Track: As-of-Right for conforming attached; Special Exception for detached units

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of main residence floor area

  • Operational Rules: Strict owner-occupancy covenant; Student rental occupancy caps strictly enforced around UConn

  • Infrastructure Review: Eastern Highlands Health District (EHHD) B100a review or municipal sewer

Somers Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 214-98 & § 214-43)

  • Permitting Track: Staff Administrative Review for attached; Special Use Permit for detached outbuildings

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of principal dwelling area

  • Operational Rules: Owner-occupancy required; Recorded deed covenant on town land records

  • Infrastructure Review: North Central District Health Department B100a septic review (100% private septic/wells)

Stafford Zoning Regulations | Tolland County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / Local Zoning Code)

  • Permitting Track: As-of-Right (PermitLink Staff Administrative Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Capped at 1 dedicated off-street parking space; Standard building and safety compliance

  • Infrastructure Review: Stafford WPCA Public Sewer or North Central District Health Department review

Tolland Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 170-43 & § 170-65)

  • Permitting Track: As-of-Right by Zoning Permit for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal structure

  • Operational Rules: Owner must reside on-site; Recorded deed restriction required

  • Infrastructure Review: Eastern Highlands Health District (EHHD) B100a review or Tolland WPCA

Union Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Planning & Zoning Regulations Section 4)

  • Permitting Track: Zoning Compliance Certificate & Planning & Zoning Commission Review

  • Allowed Typologies: Attached and Detached permitted on qualifying rural acreage

  • Dimensional Caps: Max 800 sq ft or 25% of principal residence

  • Operational Rules: Strict owner-occupancy covenant; Commercial and short-term leasing prohibited

  • Infrastructure Review: Northeast District Department of Health (NDDH) B100a review (100% private wells and septic)

Vernon Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.19 / Adopted Standards)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of gross floor area

  • Operational Rules: Owner-occupancy required in primary or accessory dwelling; Recorded deed covenant

  • Infrastructure Review: Vernon WPCA Public Sewer connection or North Central District Health Department

Willington Zoning Regulations | Tolland County

  • Regulatory Status: Opted Out (Town Zoning Regulations Comprehensive Code Update)

  • Permitting Track: Staff Administrative Review for attached; Special Permit for detached outbuildings

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal living area

  • Operational Rules: Owner-occupancy required; Recorded deed covenant mandatory

  • Infrastructure Review: Eastern Highlands Health District (EHHD) B100a septic review

Windham County (All 15 Municipalities Complete Directory)

Ashford Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 200 & Article 4)

  • Permitting Track: As-of-Right (Administrative Review by Zoning Enforcement Officer) for attached; Special Permit for detached outbuildings

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of principal dwelling area

  • Operational Rules: Owner-occupancy required; Single-family architectural character maintained; Recorded deed covenant

  • Infrastructure Review: Eastern Highlands Health District (EHHD) B100a septic review (100% private wells and septic)

Brooklyn Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 3.C & § 6.4)

  • Permitting Track: Staff Administrative Review for attached; Special Permit with site plan review for detached accessory structures

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of main residence finished living area

  • Operational Rules: Primary residence must be owner-occupied; Annual registration affidavit required; STRs restricted

  • Infrastructure Review: Brooklyn WPCA Public Sewer connection or Northeast District Department of Health (NDDH) septic clearance

Canterbury Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.1 / Rural District Regulations)

  • Permitting Track: As-of-Right by Zoning Permit for attached; Special Exception (P&Z Public Hearing) for detached units

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 850 sq ft or 30% of principal structure

  • Operational Rules: Owner-occupancy required; 45,000 sq ft contiguous buildable lot area compliance; STRs restricted

  • Infrastructure Review: Northeast District Department of Health (NDDH) B100a septic approval (100% private septic/wells)

Chaplin Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 5.2 & § 8.3)

  • Permitting Track: Staff Review by Zoning Enforcement Officer for internal; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 30% of primary floor area

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on town land records

  • Infrastructure Review: Eastern Highlands Health District (EHHD) B100a septic review (100% private wells and septic)

Eastford Land Use & Building Regulations | Windham County

  • Regulatory Status: No Local Municipal Zoning (One of CT’s non-zoned towns; governed by State Building, Subdivision, & Public Health Code)

  • Permitting Track: As-of-Right via Local Building Official & Health Sanitarian Review

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Governed by lot setback lines, driveway access, and structural Building Code parameters

  • Operational Rules: Multi-unit/accessory residential uses permitted adhering to environmental and sanitary codes

  • Infrastructure Review: Northeast District Department of Health (NDDH) B100a septic review (100% private septic systems)

Hampton Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.2 & § 6.5)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Permit for detached outbuildings

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 33% of principal structure

  • Operational Rules: Strict owner-occupancy covenant; Deed covenant recorded; Short-term rentals prohibited

  • Infrastructure Review: Northeast District Department of Health (NDDH) B100a septic clearance (100% private septic/wells)

Killingly Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 410.1 & § 570)

  • Permitting Track: As-of-Right by Zoning Permit for conforming attached; Special Permit for detached accessory barns

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 35% of principal residence floor area

  • Operational Rules: Owner-occupancy required; Borough of Danielson historic overlay standards apply where applicable

  • Infrastructure Review: Killingly WPCA Public Sewer or Northeast District Department of Health (NDDH) review

Plainfield Zoning Regulations | Windham County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / PermitLink System)

  • Permitting Track: As-of-Right (Planning & Zoning Department Administrative Staff Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Capped at 1 dedicated off-street parking space; Standard town residential building codes apply

  • Infrastructure Review: Plainfield WPCA Public Sewer connection or Northeast District Department of Health (NDDH) review

Pomfret Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations Section 4 & Section 12 / Adopted 2024–2026 Code)

  • Permitting Track: Administrative Staff Review via Certificate of Zoning Compliance for attached; Special Permit for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal structure living area

  • Operational Rules: Owner-occupancy required; Recorded deed restriction on municipal land records; STRs restricted

  • Infrastructure Review: Northeast District Department of Health (NDDH) B100a septic review (100% private wells and septic)

Putnam Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 304 & § 402)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Exception for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 900 sq ft or 30% of gross floor area

  • Operational Rules: Owner must reside on-site; Standard residential design compatibility review

  • Infrastructure Review: Putnam WPCA Public Sewer/Water connection or Northeast District Department of Health (NDDH) review

Scotland Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations § 4.3 & § 7.1)

  • Permitting Track: Staff Review by Zoning Official for internal; Special Permit (P&Z Public Hearing) for detached additions

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 800 sq ft or 25% of principal dwelling

  • Operational Rules: Strict owner-occupancy covenant; Recorded deed covenant; STRs prohibited

  • Infrastructure Review: Eastern Highlands Health District (EHHD) B100a septic review (100% private wells and septic)

Sterling Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations Article III & Article IV / Adopted Code)

  • Permitting Track: As-of-Right by Zoning Permit via PermitLink for attached; Commission review for detached configurations

  • Allowed Typologies: Attached and Detached permitted (requires 30,000 sq ft minimum contiguous buildable area)

  • Dimensional Caps: Max 900 sq ft or 30% of primary residence floor area

  • Operational Rules: Owner-occupancy required; Two-acre minimum parcel baseline per dwelling unit

  • Infrastructure Review: Northeast District Department of Health (NDDH) B100a septic review (100% private septic systems)

Thompson Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations Article 4 / § 4.2)

  • Permitting Track: Staff Administrative Review for conforming attached; Special Permit (P&Z Commission) for detached

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal structure

  • Operational Rules: Owner-occupancy required in primary or accessory unit; Recorded deed restriction on land records

  • Infrastructure Review: Thompson WPCA Sewer or Northeast District Department of Health (NDDH) septic clearance

Windham Zoning Regulations | Windham County

  • Regulatory Status: Default State Standards Applied (Opt-In under PA 21-29 / City of Willimantic & Town Code)

  • Permitting Track: As-of-Right (Department of Planning & Development Administrative Staff Review)

  • Allowed Typologies: Attached and Detached units permitted

  • Dimensional Caps: Max 1,000 sq ft or 30% of primary structure

  • Operational Rules: Max 1 off-street parking space; Historic District Commission approval required in Willimantic overlay

  • Infrastructure Review: Windham WPCA Public Sewer/Water connection or Town Sanitarian review

Woodstock Zoning Regulations | Windham County

  • Regulatory Status: Opted Out (Town Zoning Regulations Article III & Article IV)

  • Permitting Track: As-of-Right (Staff Administrative Review) for attached; Special Permit for detached carriage conversions

  • Allowed Typologies: Attached and Detached permitted

  • Dimensional Caps: Max 1,000 sq ft or 33% of principal living area

  • Operational Rules: Strict owner-occupancy covenant; Lake Bunggee, Quassett Lake, and Witches Woods lake tax district overlays apply

  • Infrastructure Review: Northeast District Department of Health (NDDH) B100a septic review (100% private wells and septic)

The Connecticut ADU & Zoning Policy Atlas: Complete 169-Town Guide

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