Shed permit rules in Plymouth 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.
A small shed skips the building permit everywhere in Plymouth County. The state code exempts a one-story detached storage shed of 200 square feet or less, so a backyard shed in Plymouth or Brockton needs no building permit.
780 CMR R105.2 exempts one-story detached accessory structures used as tool and storage sheds, playhouses, and similar uses when the floor area does not exceed 200 square feet. That building-permit exemption is statewide, so it reads the same in every Plymouth County town. It does not waive local zoning: town bylaws still set setbacks from lot lines and rear-yard placement, and wetlands or conservation restrictions can still apply. A shed over 200 square feet, or one wired for electricity, needs a permit. The county plays no part.
A shed over 200 square feet built without a permit is illegal work under 780 CMR and draws a stop-work order. A compliant-size shed placed inside a zoning setback violates the town bylaw.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Plymouth County's shed rules rules stack up against other locations.
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