Retaining walls over 4 feet require a Somerville building permit and engineered plans, with drainage, property-line, and historic-district review considerations under the Massachusetts Building Code.
Retaining walls in Somerville are regulated as structures under the Massachusetts State Building Code (780 CMR) and the Somerville Zoning Ordinance. Any retaining wall more than 4 feet in height measured from the bottom of the footing to the top, or any wall supporting a surcharge such as a driveway or sloped fill, requires a building permit and plans stamped by a Massachusetts-licensed professional engineer. Walls must be entirely on the owner's property with adequate setback, include designed drainage (weep holes, filter fabric, and a drain behind the wall), and use engineered materials or segmental block systems with manufacturer specifications. In historic districts, material and finish require Historic Preservation Commission review. Failed walls threatening adjoining property or the public way can draw immediate correction orders from Inspectional Services with fines starting at 300 dollars and possible emergency orders of condemnation.
Contact your local code enforcement office for specific penalty information.
Somerville, MA
Somerville restricts amplified music through its noise ordinance and entertainment licensing, with plainly-audible standards at property lines and stricter c...
Somerville, MA
Somerville limits construction noise to daytime and early-evening weekday hours with shorter Saturday windows and a full Sunday and holiday prohibition, refl...
Somerville, MA
Overnight street parking in Somerville requires a resident permit citywide. Snow emergencies trigger odd-even or posted-side bans.
Somerville, MA
Commercial vehicles over 2.5 tons cannot park overnight on Somerville residential streets. Loading zones are time-limited and signed by block.
Somerville, MA
Most Somerville streets are resident-permit zones. Non-residents are limited to 2 hours on posted blocks from 8 AM to 8 PM daily including weekends.
Somerville, MA
Traditional livestock such as cattle, horses, goats, sheep, and pigs are not permitted on residential lots in Somerville, which has no agricultural zoning di...
Side-by-side rule comparisons with other cities in Middlesex County.
See how other cities in Middlesex County handle retaining walls.
See how Somerville's retaining walls rules stack up against other locations.
Quick Compare
Help us keep this page accurate. If you notice an error or outdated information, let us know.