Tiny House in Washington
Greenpod Design
1531 West Sims Way, Port Townsend, WA 98368
Greenpod Design builds custom DADUs in Washington using SIP construction and sustainable materials. They handle permits, ADA-compliant design, and energy-efficient builds. WA law allows up to two ADUs per lot, up to 1,000 sq ft.
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Puget Sound ADU Builders
4712 South Morgan Street, Seattle, WA 98118
Puget Sound ADU Builders is a leader in ADU construction in western Washington state, excelling in design, construction, finishing, and permitting ADUs, DADUs, backyard cabins, garage conversions, duplexes, town homes, and multi-unit projects.
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Mallard Brothers Construction
120 State Avenue Northeast, Olympia, WA 98501
Mallard Brothers Construction builds ADUs & Tiny Homes in Olympia, WA. They offer attached, detached, garage conversions & ADA-accessible units, managing design, permits & construction for property owners seeking rental income or extra living space.
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Wolf Industries
607 Southeast Eaton Boulevard, Battle Ground, WA 98604
Wolf Industries builds factory-constructed, code-compliant tiny homes delivered directly to your property. Ideal as a backyard cottage, granny flat, ADU, or in-law suite, their build-deliver-setup model simplifies small-space living.
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Tiny Cottage Builders NW
26650 Ice Harbor Drive, Burbank, WA 99323
Tiny Cottage Builders NW offers ADU construction, garage conversions, basement finishing & home remodeling in Tri-Cities, WA. Led by Brandon Lott, every project is personally managed ensuring quality craftsmanship & clear communication.
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OMARC Design
Monitor, WA 98836
OMARC Design's single story tiny home is 24x8 ft with 182 sq ft of living space. Features include a lofted bed, full bathtub, electric kitchen, and 25-40% recycled materials. Ideal as an ADU, backyard cottage, or granny flat.
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Neil Kelly Washington
804 North Alberta Street, Seattle, WA 97217
Neil Kelly Washington offers ADU design and build services in the Northwest, including detached ADUs, garage conversions, and attached units. Their team navigates local permits, balances design with functionality, and helps homeowners add value through custom accessory dwelling units.
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Homez Remodel
13213 Southeast 278th Street, Kent, WA 98042
Homez Remodel is a Seattle ADU builder specializing in DADUs, backyard cottages, garage conversions & basement ADUs. With 10+ years experience, they handle permits, design & construction across Seattle, Bellevue, Kirkland & more.
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Cast Architecture
115 North 36th Street, Seattle, WA 98103
Cast Architecture specializes in ADU and backyard cottage design in Seattle since 2009. With 80+ projects, their Cedar Cottage is pre-approved by Seattle & Kirkland. Award-winning designs include Widner Cottage and Lichtenstein Studio. Visit castcottages.com.
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Other cities in Washington
What you need to know
Searching for top Tiny House ADU Contractors in Washington? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).
Working with a qualified Tiny House ADU Contractor in Washington ensures your ADU project meets local building codes, zoning laws, and permit requirements. Whether you're planning a detached ADU, garage conversion, or backyard cottage, experienced Tiny House professionals can guide you through every step.
Washington homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Tiny House experts featured here bring local expertise and proven experience to help make your project a success.
Browse our listings to find the best Tiny House ADU Contractors in Washington, and get started today.