Permit Required? Required
Typical Fee Range $200–$800 Based on construction value plus individual trade permit fees.
Fee Method Valuation-based
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What's Required in Washington

  • Plan showing bathroom layout and fixture placement.
  • Plumbing permit for all fixture changes (tub, shower, toilet).
  • Electrical permit for GFCI outlets and lighting.
  • Waterproofing verification for shower pans and surrounds.
  • Exhaust fan installation (mechanical permit may be required).
  • Lead-safe work practices if the home was built before 1978.

Do You Need a Permit to Remodel a Bathroom in Washington

It depends on what you’re changing. A cosmetic bathroom refresh in Washington — 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 Department of Buildings; the requirements above outline what Washington treats as permit-worthy.

What Bathroom Work Needs a Permit in Washington

In Washington, 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 Department of Buildings before you start.

How to Get a Bathroom Remodel Permit in Washington

1

Step 1: Concept Layout

Identify if any walls or plumbing stacks are being moved.

2

Step 2: Sub-Permit Filing

Plumbing and Electrical contractors must file sub-permits via Access DC.

3

Step 3: Building Permit Application

Apply for the general alteration permit for the structural/wall work.

4

Step 4: Close-In Inspections

Inspectors must see the 'rough' plumbing and electrical before tiling starts.

5

Step 5: Final Sign-off

Final inspection of all fixtures, venting, and electrical safety.

Frequently Asked Questions

Replacing a toilet in the same location usually does not require a permit, but moving it does.
It is an inspection done when pipes and wires are visible, before they are covered by drywall or tile.
Yes, unless the bathroom has a window that meets specific size requirements for ventilation.
Only if you’re changing more than surfaces. Cosmetic work in Washington — 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 Department of Buildings.
Yes — relocating a toilet, sink, or shower drain, or adding a new fixture, generally requires a plumbing permit in Washington, even inside a cosmetic-looking remodel. Replacing a fixture in the same spot usually doesn’t. Check with the Department of Buildings.