ADU Permit Online Portal Guide in Spokane, Washington
Everything you need to apply for a adu permit in Spokane, Washington — documents, fees, steps, and a downloadable submission packet.
Key Facts
- Permit required
- Yes
- Submission method
- Online
- Typical fee range
- $1,800 – $4,125
- Review time
- Varies by jurisdiction
- Inspections
- 5 inspections required
City of Spokane
Verified6-step online submission process — account registration required[1][2]
Open PortalPortal steps may change without notice. Always confirm the current process at Spokane's online portal.
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Get a personalized ADU permit packet for Spokane, Washington — tailored to your project details.
- Complete list of required forms and documents
- Pre-filled templates: Permit Cover Sheet
- Fee breakdown: $600–$2,500 estimated total
- Step-by-step City of Spokane portal submission guide
- Inspection prep checklist (5 items)
- Personalized for your specific project details
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Required Documents
Spokane requires the following documents for this permit application.
Site Plan
Scaled site plan showing property boundaries, existing structures, proposed ADU location, setbacks, and parking
Floor Plans
Architectural floor plans showing all rooms, dimensions, and layout of ADU
Elevation Drawings
Front, rear, and side elevations showing building height, materials, and fenestration
Utility Plans
Plans showing water, sewer, electrical, and gas connections to ADU
Proof of Ownership
Current property deed or title showing proof of ownership
Environmental Assessment
SEPA environmental checklist if required by jurisdiction
Structural Calculations
PE-stamped structural calculations for foundation and framing
Fees and Timeline
Fee Breakdown
| Fee | Range | Confidence |
|---|---|---|
| ADU Permit Fee | $1,200 – $2,500 | Verified |
| Plan Review Fee | $600 – $1,625 | Verified |
Inspections Required
Foundation inspection per Washington Building Code - verify
Foundation inspection per Washington Building Code - verify proper foundation per plans
Framing inspection - check structural framing and height com
Framing inspection - check structural framing and height compliance (maximum 24 feet)
Electrical inspection - verify separate electrical service a
Electrical inspection - verify separate electrical service and safety compliance
Plumbing inspection - check water and sewer connections for
Plumbing inspection - check water and sewer connections for proper installation
Final inspection - comprehensive verification of all systems
Final inspection - comprehensive verification of all systems and code compliance
Authority Sources
Data on this page is sourced from official records published by the permitting authority. Always verify requirements directly before submitting.
Verified February 15, 2026
Verified February 15, 2026
Verified February 15, 2026
Frequently Asked Questions
- Do I need a adu permit in Spokane?
- Yes. Spokane requires a adu permit for this type of project. Submitting without a permit may result in fines, required removal, or complications when selling your property.
- How long does adu permit approval take in Spokane?
- Processing times in Spokane vary depending on project complexity and current review volume. The process involves 6 steps. Contact Spokane Development Services for current timelines.
- What documents are required for a adu permit in Spokane?
- Spokane requires 7 documents including Site Plan, Floor Plans, Elevation Drawings, Utility Plans, and others. See the full list above for details.
- What happens if I build without a adu permit in Spokane?
- Building without a permit in Spokane can result in stop-work orders, fines, required removal of work, difficulty selling your property, and insurance complications. It is strongly recommended to obtain proper permits before starting work.
- Can PermitMagic help prepare my adu permit submission in Spokane?
- Yes. PermitMagic generates a submission-ready packet tailored to Spokane's requirements, including a document checklist, workflow steps, and authority references. Start a permit plan to get your personalized packet.
- How much does a adu permit cost in Spokane?
- ADU permit fees in Spokane typically range from $1,800 to $4,125, depending on project scope. Fees may include building permit, plan review, and technology surcharges. Verify current fees with Spokane.
Related Permits
Other permits in Spokane
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