Can I Build Tiny Home in Spokane, WA? (2026)
Find out if you can build a tiny home in Spokane, WA. Rules, permit requirements, costs, and next steps.
Tiny homes on permanent foundations are allowed in Spokane, WA. Tiny homes on wheels are not permitted as permanent dwellings.
A tiny home is a small dwelling unit — typically under 400 sq ft — that can be built on a permanent foundation or on wheels. In Spokane, WA, the rules differ significantly depending on whether the structure is on a permanent foundation (treated as a dwelling unit under building code) or on wheels (treated as a recreational vehicle under vehicle code). Tiny homes on permanent foundations must meet a minimum size of 150 sq ft in Spokane.
Tiny Home Rules in Spokane
Tiny Home Rules in Spokane: Foundation-based tiny homes: Permitted. Tiny homes on wheels (THOWs): Not permitted as permanent dwelling — classified as recreational vehicle. Minimum size: 150 sq ft. Tiny homes on permanent foundations are permitted subject to Spokane Municipal Code and Washington Residential Code. Tiny homes on wheels are not permitted as permanent residences. Spokane's affordability and outdoor recreation access attract residents seeking alternative housing — tiny homes on foundation are a viable option in some residential zones.
Costs & Fees
Building permit fees for tiny homes in Spokane follow the same schedule as other new construction. Contact the City of Spokane Building Services at (509) 625-6300 for current fee information.
Next Steps
Next steps for building a tiny home in Spokane: 1. Determine foundation vs. wheeled — the rules are fundamentally different. 2. For foundation tiny homes, obtain a building permit from the City of Spokane Building Services. 3. For wheeled tiny homes, verify whether your property allows RV siting. 4. Check if your tiny home could qualify as an ADU on your property.
City of Spokane Building Services
Phone: (509) 625-6300
Website: https://my.spokanecity.org/buildingservices/
Online Permits: https://my.spokanecity.org/buildingservices/permits/
Frequently Asked Questions
Can I build an ADU on my Spokane property?
Yes. Washington HB 1337 (2023) requires Spokane to allow at least 2 ADUs per single-family lot by-right, without owner-occupancy requirements. ADUs are limited to 1,000 sqft. No owner-occupancy requirement. Spokane has updated its Municipal Code to comply with state law. The permit must be processed ministerially. Contact Spokane Planning or Building Services for specific requirements.
How is Spokane different from Seattle?
Spokane and Seattle are both major Washington cities but are very different places. Spokane is in Eastern Washington, 280 miles east of Seattle across the Cascade Mountains, which create a rain shadow making Spokane dry and semi-arid. Seattle receives 37 inches of rainfall per year; Spokane gets 17 inches but 50 inches of snow. Seattle's median home price is roughly double Spokane's. Avista Utilities serves Spokane's electric and gas needs — completely different from Seattle City Light or Puget Sound Energy. Spokane's economy is driven by healthcare, education, and government rather than tech.
Who provides electricity in Spokane?
Avista Utilities provides both electric and natural gas service to Spokane. This is different from most of Western Washington, which is served by Puget Sound Energy or municipal utilities like Seattle City Light. Avista is a regulated investor-owned utility headquartered in Spokane. For solar installations, you'll need both a permit from Spokane Building Services and an interconnection agreement with Avista.
Are short-term rentals allowed in Spokane?
Yes. Short-term rentals are allowed in Spokane with a license ($150/year). Spokane's STR market benefits from tourism (outdoor recreation, Gonzaga athletics, conventions at the Convention Center), university visitors (Gonzaga, Eastern Washington University, WSU Medical School), and sports tourism (Hoopfest, Bloomsday). Washington State Hotel-Motel Tax and Spokane lodging taxes apply to all STR rentals.
Is solar worth it in Spokane compared to Seattle?
Solar is actually more productive in Spokane than Seattle due to Eastern Washington's drier, sunnier climate. Spokane has approximately 25 more sunny days per year than Seattle. While Spokane's electricity rates may be lower than Seattle (reducing the dollar value of each kWh), the higher solar production can offset this. Avista offers net metering. Washington State's sales tax exemption on solar equipment applies throughout the state. A solar installer can provide a site-specific production estimate.
Source: City of Spokane Building Services — Building Regulations. Last verified April 6, 2026. View source