Shed permit rules in Cambridge, MA — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
Cambridge requires a building permit for any shed over 120 sq ft and zoning compliance for smaller sheds. Setbacks of 3 to 5 feet apply, with extra review in historic districts.
Under the Massachusetts State Building Code (780 CMR), a building permit is required for any accessory structure larger than 120 square feet, including sheds. In Cambridge, even smaller sheds must comply with the zoning ordinance dimensional requirements for accessory structures, which typically require minimum rear and side yard setbacks of 3 to 5 feet depending on district and structure height. Maximum shed height is generally limited to 15 feet. Sheds in Cambridge Historic Districts or near designated historic properties require additional review by the Cambridge Historical Commission, which can regulate exterior materials and placement. Electrical service to a shed requires a separate electrical permit. Concrete foundations require additional review. Cambridge Inspectional Services handles all permitting at 617-349-6100.
Contact your local code enforcement office for specific penalty information.
Cambridge, MA
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Side-by-side rule comparisons with other cities in Middlesex County.
See how other cities in Middlesex County handle shed rules.
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