Deck Permit requirements across Massachusetts
By Mario Bailey Last verified 2026-06-17
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.
| Locality | Permit required? | Typical threshold |
|---|---|---|
| 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 |