Accessory Structures in Brockton, MA (2026)
4 verified accessory structures rules for Brockton, Massachusetts, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Massachusetts enacted statewide ADU legislation effective 2025, allowing ADUs by right in single-family zones. Brockton must comply with the new state requirements.
Brockton ADU (Accessory Dwelling Unit) Rules
Some RestrictionsShed Rules
Brockton regulates sheds through the zoning ordinance. Small sheds under a certain size may not require a building permit but must meet setback requirements.
Brockton Shed & Outbuilding Rules
Some RestrictionsGarage Conversions
Garage conversions in Brockton require a building permit and must comply with the Massachusetts State Building Code for habitable space. Off-street parking requirements must still be met.
Brockton Garage Conversion Rules
Some RestrictionsMass. Gen. Laws ch. 40A, § 3A (Multi-Family Zoning As of Right)
1 district of reasonable size in which multi-family housing is permitted as of right; provided, however, that such multi-family housing shall be without age restrictions and shall be suitable for families with children. For the purposes of this section, a district of reasonable size shall: (i) have a minimum gross density of 15 units per acre, subject to any further limitations imposed by secti...
Carport Rules
Brockton regulates carports as accessory structures under Appendix C, Article III, Section 27-20 of the Code of Ordinances (Zoning). Detached accessory structures must satisfy the setback requirements applicable to the underlying residence district, and any accessory building must be located on the same lot as the principal building. Building permits are issued under 780 CMR (Massachusetts State Building Code) by Brockton's Inspectional Services Department.
Carport Rules in Brockton
Some RestrictionsLooking for Plymouth County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Brockton city rules.
Accessory Structures in Plymouth County →