Accessory Structures in New Britain, CT (2026)
4 verified accessory structures rules for New Britain, Connecticut, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
New Britain's accessory dwelling unit chapter bars building an ADU within twenty-four months of a new single-family home in the S-1, S-2, and S-3 districts, unless the home was rebuilt after a fire, flood, or other disaster. Code of Ordinances Section 25-3 also requires every ADU to run on the parcel's existing water, gas, and electric connections.
New Britain ADU Construction and Utility Rules
Some RestrictionsNew Britain Code of Ordinances §§ 25-2, 25-3
No owner of a property, in the S-1, S-2, and S-3 district shall construct an accessory dwelling unit within twenty-four (24) months of a new construction single-family home on the same parcel. Replacement of a building destroyed by fire, flood, natural disaster, or other "act of god" that previously housed an accessory dwelling unit shall be exempt from requirement. ... Any and all accessory dw...
ADU Owner Occupancy
New Britain requires the owner of any property with an accessory dwelling unit to personally occupy one of the two units as a permanent residence. Code of Ordinances Section 25-1 caps ADUs at one per lot, limits occupancy to two people, and makes owners file proof of occupancy every year to the zoning department.
New Britain ADU Owner-Occupancy Requirement
Significant RestrictionsNew Britain Code of Ordinances § 25-1
No owner of a property may construct and maintain an accessory dwelling unit without claiming one (1) unit on said property as permanent residence. Only one (1) accessory dwelling unit shall be allowed per property. Property owner must submit annually to the zoning department via online permitting system or hand delivery to office a copy of owner's homeowner insurance policy to serve as proof o...
ADU Rental Restrictions
New Britain's zoning code allows accessory dwelling units on residential lots, but it draws a hard line at renting them out nightly. Zoning Ordinance § 270-40-40.300.60 states that accessory dwelling units shall not be used for short-term rentals, closing the city's short-term rental program to any ADU regardless of size or district.
New Britain Bars Short-Term Rental ADUs
Heavy RestrictionsNew Britain Zoning Ordinance § 270-40-40.300.60
Accessory dwelling units shall not be used for short-term rentals.
Shed & Carport Rules
In the City of New Britain, a shed, garage or other accessory building can't sit in a required front or side yard and must stand at least 10 feet from the main house. In the S-1 single-family district its rear-yard footprint tops out at 25% of that yard, height at 15 feet, and setback at 8 feet; S-2 lots allow the same coverage and height but only a 3-foot rear setback. Building one requires a Certificate of Zoning Compliance.
New Britain Shed and Accessory Building Rules
Some RestrictionsNew Britain Zoning Ordinance §§ 60-40-80, 70-40-80, 230-10-10, 280-100-20
60-40-80 ACCESSORY BUILDINGS 60-40-80.01 Coverage of required rear yard - Maximum . . 25% 60-40-80.02 Height in required rear yard - Maximum (ft.) . . 15 60-40-80.03 Setback in required rear yard - Minimum (ft.) . . 8 ... 70-40-80 ACCESSORY BUILDINGS 70-40-80.01 Coverage of required rear yard - Maximum . . 25% 70-40-80.02 Height in required rear yard - Maximum (ft.) . . 15 70-40-80.03 Setback i...