Shed permit rules in Suffolk County, MA — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
No county-level shed ordinance. Accessory structures governed by each city's zoning code and 780 CMR. Typical permit threshold: structures over 120–200 sq ft or those with electrical/plumbing. Setbacks set by each city's zoning district.
Under 780 CMR, single-story structures under 120 sq ft generally do not require building permits. Each city's zoning still requires setback and coverage compliance. Dense lots throughout the county constrain placement. Larger sheds need permits. Sheds cannot be dwellings without ADU permitting. This shed rules rule under Suffolk County's accessory structures ordinances applies to unincorporated areas of Suffolk County. For current statutory text, amendments, enforcement procedures, fines, appeal options, and any exemptions that may apply to your situation, contact Suffolk County code enforcement directly or consult the official Massachusetts municipal code library. Ordinances change periodically; always verify with local staff before relying on summary information.
Unpermitted sheds over 120 sq ft face enforcement. Setback violations require relocation.
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See how Suffolk County's shed rules rules stack up against other locations.
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