Accessory Structures in New Haven, CT (2026)
3 verified accessory structures rules for New Haven, Connecticut, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
New Haven allows one accessory dwelling unit per lot in RS-1, RS-2, RM-1, and RM-2 districts, sized 400 to 1,200 square feet and no larger than the principal dwelling, per Section 22.
New Haven Accessory Dwelling Unit Zoning
Some RestrictionsNew Haven Zoning Ordinance § 22(B), § 22(E)(4)
Accessory Dwelling Units are permitted within the RS-1, RS-2, RM-1, and RM-2 Zoning Districts and subject to the regulations of this Section and the bulk regulations of the subject zone if not expressly modified by this section. ... Living Area: an ADU shall have a minimum livable area of not less than 400 square feet. An ADU shall have a maximum gross floor area of not more than 1,200 square f...
ADU Rental Restrictions
New Haven ADUs are only allowed when the property owner lives on site, and a recorded deed restriction bars ever selling the accessory unit separately from the main house.
New Haven ADU Owner-Occupancy Requirement
Significant RestrictionsNew Haven Zoning Ordinance §§ 22(G)-(H)
G.PROPERTY OWNERSHIP AND OCCUPANCY.1.Accessory dwelling units shall only be permitted when the property owner lives on the property, within either the principal dwelling or accessory dwelling unit... H.DEED RESTRICTION... The accessory dwelling unit shall not be sold separately from the principal dwelling unit, nor shall the lot be subdivided to provide a separate lot for the accessory dwelling...
Shed & Carport Rules
New Haven's zoning ordinance treats an attached carport as a building projection, letting it reach into a required yard by no more than three feet and never within five feet of a lot line.
New Haven Carport Setback in Required Yards
Some RestrictionsNew Haven Zoning Ordinance § 1 (definitions); § 25(b)
[Section 1, definitions] PROJECTION means any structure attached to a principal or accessory building and extending beyond the face of a building foundation wall, including roofs, cornices, chimneys, bay windows, shading devices, shelters, carports, balconies, outside stairways, fire escapes, steps and open porches... [Section 25(b)] A projection from a building may extend into a required yard ...