Accessory Structures in Quincy, MA (2026)
2 verified accessory structures rules for Quincy, Massachusetts, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Quincy allows ADUs by right under MGL c. 40A §3 and the 2024 Affordable Homes Act. One ADU per single-family lot is allowed as internal, addition, or detached unit. Maximum size is 50% of principal dwelling or 900 sq ft, whichever is less. Minimum size is 320 sq ft for detached units.
Quincy ADU Rules
Few RestrictionsMass. Gen. Laws ch. 40A, § 3 (Accessory Dwelling Unit Provisions)
No zoning ordinance or by-law shall prohibit, unreasonably restrict or require a special permit or other discretionary zoning approval for the use of land or structures for a single accessory dwelling unit, or the rental thereof, in a single-family residential zoning district; provided, that the use of land or structures for such accessory dwelling unit under this paragraph may be subject to re...
Shed & Carport Rules
Quincy, Massachusetts (Norfolk County) zoning allows toolsheds and storage sheds up to 10 feet tall in every residence district by right, with a six-foot rear/side setback, a 25%-of-house size cap, and a 10-foot gap from other buildings.
Quincy Shed & Accessory Building Rules
Some RestrictionsQuincy Municipal Code Ch. 375 (Zoning), § 3.2.3(1)
Toolsheds, garden sheds, storage sheds, or other like buildings not more than 10 feet in height shall be allowed as accessory uses in the residence districts. Garages are allowed up to a maximum of 16 feet in height. Any such building shall meet the minimum front yard requirements; however, the minimum rear and side yard setback shall be six feet. No such building shall be higher than one story...
Looking for Norfolk County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Quincy city rules.
Accessory Structures in Norfolk County →