Accessory Structures in Brookline, MA (2026)
1 verified accessory structures rules for Brookline, Massachusetts, sourced directly from the municipal code and official government pages.
Verified from official government sources
Garage Conversions
Brookline's 2024 ADU bylaw amendment eliminates the prior 5-year age requirement for garage conversions to ADUs. Conversions require a building permit and must meet 780 CMR standards. Detached garage ADUs must comply with ZO §§ 5.63 and 5.72.
Brookline Garage Conversion Rules
Some RestrictionsMass. Gen. Laws Ch. 40A Sec. 3A (MBTA Communities — Multi-Family Zoning)
Section 3A. (a)(1) An MBTA community shall have a zoning ordinance or by-law that provides for at least 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...
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County ordinances apply to unincorporated areas and may supplement Brookline city rules.
Accessory Structures in Norfolk County →