Do I need a deck permit in Massachusetts?

In Massachusetts it depends on the size of the job. Permits are issued locally, so the answer comes from your Massachusetts city or county rather than a single statewide rule. Of the 2 Massachusetts jurisdictions we have verified for deck work, 0 require a permit outright, 2 depend on the size or scope of the job, and 0 require none.

Is there a deck permit exemption in Massachusetts?

2 of the 2 Massachusetts jurisdictions we cover set a threshold rather than a flat rule, so the same job can be exempt in one Massachusetts county and permitted in the next. The table above lists each Massachusetts jurisdiction's published threshold in its own words, with the source and the date we verified it.

Massachusetts

Do you need a deck permit in Massachusetts?

By Mario Bailey Last checked 15 Aug 2026

Always required: 0; of 2 jurisdictions
Conditional: 2; depends on size or scope
Not required: 0; exempt outright

Deck Permit rules nationwide, beyond Massachusetts.

Framing a backyard deck: fresh lumber and a nail gun on new decking

Requirements and size thresholds for deck permits vary by locality. The table below compares what each Massachusetts county or city requires. Always confirm with the local office before starting.

Comparing states? See deck permit rules across every locality we cover.

The application steps and inspection sequence for deck permits come from the model code rather than from Massachusetts law, so they read the same wherever you build. We keep that walkthrough in one place: how a deck permit application and its inspections work, start to finish. What changes between Massachusetts jurisdictions is below: who requires a permit, what they charge, and which office you file with.

Swipe sideways to see thresholds and confidence.

Locality	Permit required?	Typical threshold	Confidence
Boston	Conditional	detached decks not more than 30 inches above grade and under 200 sq ft that do not serve an exit door may be exempt	Based on building code
Worcester	Conditional	deck area, where the deck is also no more than 30 inches above grade at any point, is not attached to the dwelling, and does not serve a required exit door	Confirmed on official page
No localities match your filter.

Common questions about deck permits in Massachusetts

Do I need a deck permit in Massachusetts?: In Massachusetts it depends on the size of the job. Permits are issued locally, so the answer comes from your Massachusetts city or county rather than a single statewide rule. Of the 2 Massachusetts jurisdictions we have verified for deck work, 0 require a permit outright, 2 depend on the size or scope of the job, and 0 require none.
Is there a deck permit exemption in Massachusetts?: 2 of the 2 Massachusetts jurisdictions we cover set a threshold rather than a flat rule, so the same job can be exempt in one Massachusetts county and permitted in the next. The table above lists each Massachusetts jurisdiction's published threshold in its own words, with the source and the date we verified it.

Do you need a deck permit in Massachusetts?

Common questions about deck permits in Massachusetts

Ready to move on your deck permit?

Apply yourself

Hire it out