Permit Fees in Seattle, WA

Seattle charges separate permits for each trade. The building department uses a valuation formula in Table D-1 for section 22.900D.010. The first $1,000 valuation costs $325. Then it scales at $1.60 per thousand up to $25,000.

An $8,000 project valuation generates $336 in DFI. You pay that same amount again for plan review. Nobody bundles these together here. Add the 5 percent technology fee and the $6.50 state surcharge. The building portion alone hits about $712. (I had to cross reference three different tables to nail down the full picture.)

Plumbing starts at a $132 base plus $26 per fixture. A five fixture bathroom runs $262. Electrical follows its own table in 22.900D.150. You might pay the $105 minimum without plans. HVAC replacement stays simple at $60 per unit.

This separate trades system makes Seattle different from cities that roll everything into one fee. The calculator on this page handles all the math for you. It factors the tech fee and surcharge automatically.

If your project valuation exceeds $15,000 then the fees climb fast. Budget for every trade individually. The numbers never lie once you find the right tables.

Bathroom and kitchen remodels need permits in Seattle. Decks require building approval. Window replacement often does too if the value hits $8,000.

Water heater swaps need a plumbing permit. The same goes for electrical panels and EV chargers. Roof replacement stays exempt for one and two family homes. You submit an affidavit by email instead. Nobody inspects it.

Don't assume your shed or fence escapes the rules. Check first. The building department doesn't forgive unpermitted work after the fact. If you wonder whether you need a permit in Seattle then you probably do.

We found the exemption list buried in the fee subtitle. It saves money on simple re roofs. Bigger structural changes never get that break.

Seattle adds a tiered special investigation fee for unpermitted work. The details live in 22.900B.020.F and Table B-2 on page 12. They base the penalty on your project valuation.

That structure means bigger jobs cost more to fix later. You can't dodge the fee once they catch it. Stop work orders come next. The city doesn't play around here.

Retroactive permitting ends up far more expensive than doing it right first. Neighbors complain or the next buyer finds out during title search. Either way you pay. If you skip the permit then the costs multiply.

The 2026 fee subtitle doesn't spell out permit duration. We couldn't locate clear rules on when work must start or how long approvals last. Check directly with the Seattle Department of Construction and Inspections on this.

Most cities set limits around 180 days. Seattle likely follows similar patterns but we won't guess. Extensions probably exist. You must request them before the clock runs out.

If your project stalls then contact SDCI early. Permits don't last forever.

The fee documents don't clearly state who must pull the permit. Contractors normally handle it in their name. That keeps them responsible for the work.

Homeowners can pull permits for their own primary residence. The process requires extra paperwork. Yet many contractors prefer to control it. If your contractor asks you to pull the permit yourself then that raises a red flag.

Don't agree to that setup. The person pulling the permit accepts legal responsibility. Your contractor should do it.

Seattle adds a 5 percent technology fee on top of permit and plan review costs. They also charge a flat $6.50 state surcharge on every permit. These extras apply across building plumbing electrical and mechanical.

The roof exemption stands out as genuinely homeowner friendly. One and two family homes skip the re roofing permit entirely. You email an affidavit and they issue same day approval. Commercial roofs still pay the $146 base. (I had to dig through multiple subsections to confirm the residential exemption.)

Solar under 12 kilowatts gets an over the counter permit for $438. The system rewards simple straightforward jobs with lower hassle. If your project stays under the valuation thresholds then the math works in your favor.

How much does a building permit cost in Seattle?

A typical bathroom remodel costs $1,098 in total permits. That includes the building plumbing and electrical fees. The calculator on this page adjusts for your specific project value.

Do I need a permit to replace a water heater in Seattle?

Yes you need a plumbing permit to replace a water heater in Seattle. The base fee runs $132 plus $26 per fixture. All in you'll pay about $172 once the tech fee and surcharge apply.

How much is a plumbing permit in Seattle?

Plumbing permits start at $132 plus $26 per fixture. A bathroom with five fixtures costs $262 before the add on fees. That doesn't cover the separate building or electrical permits.

Do I need a permit to build a deck in Seattle?

Yes you need a building permit to build a deck in Seattle. A typical $8,000 deck costs $713 including plan review. Valuation drives the exact number.

Do I need a permit for electrical work in Seattle?

Most electrical work requires a permit in Seattle. Simple jobs without plans start at the $105 minimum. A 200 amp panel upgrade runs about $218 with all fees included.

Do I need a permit to replace a roof in Seattle?

No you don't need a permit to replace a roof on a one or two family home in Seattle. Submit an affidavit by email instead. They exempt these jobs completely.