Permit Required? Required
Typical Fee Range $150–$800 Building fee plus plumbing ($20 primary + $5/fixture) and electrical fees.
Fee Method Valuation-based
Apply Online Apply at Inspectional Services Department →

What's Required in Boston

  • Plumbing permit required for all fixture changes or removals.
  • Electrical permit for GFCI outlets and bathroom lighting.
  • Waterproofing system (shower pan) must be inspected before tiling.
  • Exhaust fan venting must lead directly to the exterior.
  • Tempered glass required for any window near a tub or shower.
  • Lead-safe practices required for homes built before 1978.

Do You Need a Permit to Remodel a Bathroom in Boston

It depends on what you’re changing. A cosmetic bathroom refresh in Boston — new paint, a vanity or toilet swapped in the same spot, re-tiling, or replacing a faucet — usually doesn’t need a building permit. You cross into permit territory once you move or add plumbing or electrical, relocate fixtures, change the layout, remove or move a wall, or add square footage. Because remodels often bundle plumbing and electrical work, many projects need those trade permits even when the building permit is borderline. Check the specifics with the Inspectional Services Department; the requirements above outline what Boston treats as permit-worthy.

What Bathroom Work Needs a Permit in Boston

In Boston, the trigger is usually moving systems, not refreshing surfaces. Work that typically requires a permit: relocating or adding plumbing (moving a toilet, sink, or shower drain), adding a shower or tub where there wasn’t one, new or moved electrical circuits and outlets, removing or altering a wall, converting a half bath to a full bath, or turning another room into a bathroom. Like-for-like swaps in the same location — same toilet spot, same tub footprint — usually don’t. Even removing a tub can need a plumbing permit if the drain is capped or moved, so confirm with the Inspectional Services Department before you start.

How to Get a Bathroom Remodel Permit in Boston

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Step 1: Layout Plan

Draw the bathroom floor plan showing fixture placements.

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Step 2: Portal Submission

Apply for the residential alteration permit online.

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Step 3: Sub-contractors

Ensure plumber and electrician file their specific permits.

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Step 4: Rough Inspections

Requires inspection of plumbing and electric before wall closure.

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Step 5: Final Check

Final walk-through for all trades to verify safety compliance.

Frequently Asked Questions

Yes, any plumbing fixture change requires a permit in Boston.
Yes, unless the bathroom has an operable window meeting code size.
It is a $20 primary fee plus $5 for every fixture.
Only if you’re changing more than surfaces. Cosmetic work in Boston — paint, re-tiling, swapping a vanity or toilet in the same spot — usually needs no permit, but moving or adding plumbing or electrical, relocating fixtures, or changing the layout does. Confirm the scope with the Inspectional Services Department.