Massachusetts Statewide Rule

Massachusetts Retaining Wall Building Code Standards

Some RestrictionsApplies statewide across Massachusetts (2026)

Massachusetts regulates retaining walls statewide through the State Building Code 780 CMR, requiring permits and engineering for walls retaining more than four feet of unbalanced fill or surcharged loads.

Key Facts

Permit Trigger: Over 4 feet
Code Reference: 780 CMR Ch 18
Engineering: Required over 4 feet
Authority: Statewide Building Code

Source: Massachusetts General Court

Full Breakdown

Under 780 CMR Chapter 18 and the Massachusetts Residential Code, retaining walls over 4 feet measured from bottom of footing to top of wall, or any wall supporting a surcharge, require building permits and engineered design by a registered professional. The State Building Code applies uniformly under MGL c. 143 s. 95, though municipalities may add zoning setback requirements. Wall design must address lateral earth pressure, surcharge, and drainage.

Violations & Penalties

Stop work orders, permit revocation, fines up to $1,000 per day under MGL c. 143 s. 94, mandatory removal of unsafe walls.

Frequently Asked Questions

Does Massachusetts require permits for short retaining walls?

The State Building Code requires permits only for walls over 4 feet or those with surcharge loads, but municipalities may require zoning permits for shorter walls.

Can cities require stricter retaining wall standards?

Cities cannot weaken the State Building Code but may impose additional zoning, setback, or stormwater requirements through local ordinances.

Who can design a regulated retaining wall in MA?

Walls requiring permits under 780 CMR must be designed by a Massachusetts registered professional engineer or registered architect.

Sources

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Full Breakdown

Frequently Asked Questions

Does Massachusetts require permits for short retaining walls?

The State Building Code requires permits only for walls over 4 feet or those with surcharge loads, but municipalities may require zoning permits for shorter walls.

Can cities require stricter retaining wall standards?

Cities cannot weaken the State Building Code but may impose additional zoning, setback, or stormwater requirements through local ordinances.

Who can design a regulated retaining wall in MA?

Walls requiring permits under 780 CMR must be designed by a Massachusetts registered professional engineer or registered architect.