⚠️ This information is for educational purposes. Always verify current regulations with the Spokane Planning Department before starting your project.
Spokane ADU Regulations at a Glance
Here are the key zoning rules for Accessory Dwelling Units in Spokane, Washington. These regulations apply as of 2026.
| Regulation | Requirement |
|---|---|
| Maximum Size | 1,000 sq ft |
| Property Setbacks | 5 ft rear, 5 ft side |
| Extra Parking Required | Required (1 space) |
| Owner Occupancy | Required |
Additional Local Requirements
- Maximum lot coverage: 35%
- ADU must be at least 200 sq ft
- Property owner must occupy primary residence
- Short-term rental of ADU prohibited
- WA HB 1337 limits local restrictions
📥 Get the Complete Spokane ADU Cheat Sheet
To get the step-by-step permit checklist and the official local contacts, download the Complete Spokane ADU Cheat Sheet.
Download the Spokane PDF Guide — $12Frequently Asked Questions About ADUs in Spokane
Can I build an ADU in Spokane?
Yes, Spokane allows ADUs under Washington state law and local zoning ordinances. [ADDITIONAL_FAQ_1]
How big can my ADU be in Spokane?
The maximum size for an ADU in Spokane is 1,000 square feet, subject to setback and lot coverage requirements.
Do I need a permit for an ADU in Spokane?
Yes, all ADUs require a building permit from the Spokane Building & Safety Department.
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