Spokane County • Permissiveness Score: 96/100
Spokane, WA ADU Zoning Rules & Regulations
Spokane passed the "Building Opportunity and Diversity in Housing" ordinance, legalizing middle housing and ADUs across all residential zones.
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Key Zoning Parameters for Spokane
Verified 2026 Max Detached Size 1,000 sq ft
Max Attached Size 1000
Rear & Side Setbacks 5 ft rear / 5 ft side
Front Setback 15 feet
Max Height Limit 25 feet (2 stories)
Owner Occupancy Not Required (Waived) No owner occupancy required.
Parking Requirements Exempt Waived within 0.5 miles of transit routes.
Junior ADU (JADU) Allowed up to 500 sq ft within primary residence
Short Term Rentals (Airbnb) Allowed with permit Allowed with registration.
Estimated Permit Fees $1,500 - $3,500
Avg Review Timeline 3 - 6 weeks
Fire Sprinklers Standard IRC rules.
Governing Ordinances & State Laws
- ✓ Spokane Municipal Code Title 17C
- ✓ WA HB 1337
Spokane ADU Frequently Asked Questions
Are DADUs allowed on small lots in Spokane?
Yes, lots as small as 2,500 sq ft can qualify for ADUs under Spokane middle housing codes.
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