Retaining Walls: Somerville vs Wakefield
How do retaining walls rules compare between Somerville, MA and Wakefield, MA?
Wakefield has fewer restrictions than Somerville.
Somerville, MA
Middlesex County
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.
View full Somerville rules →Wakefield, MA
Middlesex County
Retaining walls over 4 feet in Middlesex County require a building permit and engineered design per MA State Building Code 780 CMR. Wetlands Protection Act may apply near streams or wetlands.
View full Wakefield rules →Key Facts Comparison
| Fact | Somerville | Wakefield |
|---|---|---|
| Permit trigger | Over 4 ft or surcharge | - |
| Code | 780 CMR | - |
| Engineer required | Walls over 4 ft | - |
| Drainage | Weep holes and backdrain | - |
| Failure fine | From 300 dollars | - |
| Permit Threshold | - | Over 4 ft or supporting surcharge |
| Code Authority | - | 780 CMR |
| Engineer Required | - | Yes, for walls over 4 ft |
| Wetlands Buffer | - | 100 ft from resource area |
| Wetlands Law | - | MGL c.131 s.40 |
Highlighted rows indicate differences between cities.
Somerville FAQ
Do I need a permit for a short rock wall?
Decorative walls under 4 feet without surcharge generally do not need a permit, but check setback and drainage before building.
Can I build directly on the property line?
No. Retaining walls must be set back on your side; any encroachment or shared structure requires a written agreement and survey.
Wakefield FAQ
Do I need a permit for a retaining wall?
Yes, if over 4 feet high or supporting a surcharge. Walls must be engineered per MA State Building Code 780 CMR.
What if my wall is near wetlands?
Any work within 100 feet of wetlands requires a Notice of Intent to your local Conservation Commission under the Wetlands Protection Act.
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