Washington · Solar · Free 2026 permit-fee estimator
Solar permit cost in Washington
On a typical $22,000 solar project, Washington's statewide median building permit fee is $363 — about 1.65% of cost. Top Seattle metros run higher.
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Washington statewide median
$363
≈ 1.65% of $22,000 project cost
Range: $175 (min) – $2,700 (max)
Top 3 Washington metros — actual permit fee
The state base × project type stays the same; the metro multiplier is where the swing comes from.
Seattle
$526
Metro multiplier: 1.45× statewide base
Bellevue
$508
Metro multiplier: 1.4× statewide base
Spokane
$399
Metro multiplier: 1.1× statewide base
Washington permit-fee context
Seattle + Bellevue + Tacoma run highest (1.6%); state minimum building code adds $4.50/permit.
Why solar? Solar permit + electrical + structural review — most jurisdictions consolidate into a single solar-PV permit at moderate fee.
What this fee does NOT include
- Plan-review service fees (typically 0.5–1% of cost, separate line)
- Per-trade fees (plumbing, electrical, mechanical — $50–$200 each)
- State-level surcharges (FL DBPR, NJ DCA, OR BCD, etc.)
- Contractor's filing/processing fee
Rule of thumb: budget 1.5–2× the base permit fee for the all-in cost.
Compare solar panel installation in Washington across all lenses
4 sister tools · same project, same stateBefore you sign, run the 5 other state-aware lenses for the same project.
FAQ — Solar permits in Washington
How much is a solar permit in Washington in 2026?
On a typical $22,000 solar project in Washington, the statewide median permit fee runs $363 — about 1.65% of project cost. Major metros run higher: Seattle $526, Bellevue $508, Spokane $399. Seattle + Bellevue + Tacoma run highest (1.6%); state minimum building code adds $4.50/permit.
Why is the fee higher in major Washington metros?
Each Washington city/county sets its own multiplier on top of the state base rate. Seattle runs 1.45× because of stricter plan review + structural review + energy-code overhead. Spokane sits lower (1.1×) because of less plan-review depth + simpler intake. Rural counties in Washington often have flat-fee schedules below even the lowest metro.
What's included in the permit fee vs. what's billed separately?
The permit fee covers the building department's intake + base review. NOT included: plan-review service fees (often a separate line, 0.5–1% of project cost), per-trade fees for plumbing/electrical/mechanical (typically $50–$200 each), and any state-level surcharges (FL adds DBPR 1.5%, NJ adds DCA, OR adds 12% BCD surcharge). Your contractor's filing fee is also separate. Budget 1.5–2× the base permit fee for the all-in cost.
Can I skip the permit and save the fee?
Don't. Working without a required permit fails any future resale inspection (the buyer's inspector WILL flag it), voids your homeowner's insurance for any related claim, and triggers retro-permitting fines that are typically 2–3× the original fee. Washington treats unpermitted solar work as a separate violation under state building code. The "savings" become a $1,500 problem at resale on a $500 fee.
Other projects in Washington
Disclaimer: Permit fees are jurisdiction-specific and change frequently. These values are 2026 medians — verify against your local building department's current fee schedule before budgeting.