Spokane ADU Permit Fees & Cost Calculator
Spokane’s current ADU-related fees appear to be governed by the city’s 2025 residential fee schedule, but the exact ADU permit and pre-development fee amounts are not clearly exposed in the available official page snippet. Washington state law also limits ADU impact fees to no more than 50% of the principal unit’s impact fees for covered jurisdictions.
Free ADU fee calculator
Estimate local ADU fees
Step 1 of 5: Location
The calculator uses staged city data from the ADUFee database with visible confidence levels and dated source tracking.
Fee overview
Exact Spokane ADU fee amounts were not visible in the available official search results and should be verified directly from the city fee schedule or permit office.
Do not use non-official third-party estimates as exact fees.
Washington state’s 50% impact-fee rule limits what Spokane may charge for ADUs, but it does not reveal the actual underlying fee schedule.
The request is for Spokane, Washington city fees rather than Spokane County or Spokane Valley.
The relevant ADU fees are municipal permit, plan-check, and impact fees; utility connection fees may exist but were not confirmed in the available official sources.
Spokane fee estimates should be verified against the current city, utility, and school district fee schedules before filing.
FAQs
Are Spokane ADU fee estimates official?
No. ADUFee.com provides planning estimates only. Final fees are set by the city, utility providers, school district, and other agencies.
What sources are used for Spokane?
The database stores city, state, utility, school, county, and other source links where available. Each estimate should still be verified locally.
Can ADU fees vary within Washington?
Yes. Permit, utility, school, inspection, and impact fees can vary by jurisdiction, parcel, project size, utility provider, and local interpretation.