Accessory dwelling unit contractor

Looking for accessory dwelling unit contractor in Spokane, WA? Call AccessoryDwellingUnit Solutions for a contact a provider — no obligation. Licensed adu builders serve Spokane and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.

About this service

A contractor oversees the daily building process, ensuring the foundation, framing, and finishes meet safety standards. You need one when you are ready to break ground and want a single point of contact to supervise tradespeople like electricians and plumbers. They act as the primary manager for your project, ensuring the work stays on track and adheres to the approved blueprints throughout the entire construction phase.

Frequently asked in Spokane

What are the disadvantages of ADUs in Spokane?

How much does an ADU cost in Washington?

The cost of an ADU in Washington depends heavily on size, materials, and site specifics in Spokane. Factors like foundation type, plumbing, and electrical work will impact the final price. A professional quote is the best way to get an accurate estimate for your project. Call us to discuss your needs.

What are the rules for ADUs in Washington?

Washington State has specific guidelines for ADUs, but local Spokane ordinances also apply. These rules often cover setbacks, lot coverage, and parking requirements. It's essential to consult with local experts to ensure your ADU complies. We can help you get that expert advice.

Is an ADU allowed in Spokane?

Yes, ADUs are generally permitted in Spokane, but specific regulations apply. These can include requirements for lot size, owner occupancy, and the ADU's size and placement. A site assessment by a qualified professional will confirm feasibility for your location. Get your questions answered with a free call.

What are the rules for ADUs in Spokane?

Are there grants for ADUs in Spokane?

Also serving nearby: Spokane Valley · Yakima · Bellevue · Renton · Kirkland

All cities in Washington →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

229,447residents

3,336per sq mile

8ZIP codes served

Serving all of Spokane — population 229,447; about 3,336 residents per square mile across 68.8 sq mi. ZIP codes covered include 99201, 99202, 99203, 99204, 99205, 99206, 99207, 99208.

Neighborhoods served in Spokane: South Hill, Browne's Addition, North Spokane, West Spokane, East Spokane, Downtown Spokane — and every surrounding area.