Why Washington’s Builders Stand Out
After Washington’s L&I (Labor & Industries) formally recognized tiny homes as dwellings under 400 sq ft, a strong regional builder scene took root.
Many now specialize in homes built to ANSI 119.5 or RVIA standards, meaning they meet safety, mobility, and inspection requirements statewide.
Whether you’re looking for a permanent foundation build or a Tiny Home on Wheels (THOW), these are the companies setting the standard.
Seattle Tiny Homes
Location: Seattle, WA
Focus: Factory-built Tiny Homes on Wheels (THOWs) certified by L&I and RVIA
Seattle Tiny Homes was one of the first Washington builders to embrace L&I’s factory inspection process. Their builds are fully road-legal, energy efficient, and designed to plug directly into water, sewer, and electrical systems—making them ideal for compliant placement in rural zones or backyard setups.
Clever Tiny Homes
Location: Serving all acorss North America
Focus: ANSI 119.5-certified Park Model RVs and THOWs
Clever Tiny Homes designs and builds high-quality, engineering-led homes that meet or exceed Washington’s inspection and certification standards.
Their Park Model RV / Tiny Home on Wheels is ANSI 119.5 certified and registered through the DMV as either a trailer or RV—depending on state requirements.
This makes Clever’s builds plug-and-play compliant for Washington’s zoning and utility hookup rules, ideal for both private lots and rural placements under L&I oversight.
Westcoast Homes
Location: Lynden, WA
Focus: Modular and park-model homes built to ANSI 119.5 standards
Located near the Canadian border, Westcoast Homes produces modular units for both sides of the border. Their THOWs and park models are known for high-quality finishes, compliance-ready construction, and the ability to handle Washington’s coastal weather conditions.
westcoast-homes.com
Tiny Heirloom
Location: Portland, OR (serving Washington statewide)
Focus: Luxury custom THOWs and mobile tiny houses
Tiny Heirloom combines high-end design with full RVIA certification, offering Washington buyers custom layouts that meet both aesthetic and regulatory needs. Their builds regularly pass L&I inspection when delivered into the state, making them a reliable cross-border option.
Wolf Industries
Location: Battle Ground, WA
Focus: Turnkey modular homes with HUD and ANSI certification
Wolf Industries operates one of the most advanced modular production facilities in Washington. Their homes are engineered for quick permitting and can qualify for financing since they’re built to both HUD and state factory-built housing standards. They also offer smaller, transportable models that align with L&I’s definition of a tiny home.
wolfindustriesinc.com
Mount Baker Tiny Homes
Location: Bellingham, WA
Focus: Northwest-ready Tiny Homes on Wheels
Built for the Pacific Northwest’s wet climate, Mount Baker Tiny Homes uses durable materials—metal roofing, vapor barriers, and insulated floors—to make year-round living more practical. Their road-ready designs meet ANSI 119.5 and include standard hookups for utilities.
Tiny Mountain Houses
Location: Vancouver, WA
Focus: Compact, family-oriented Tiny Homes on Wheels
Tiny Mountain Houses builds ANSI-compliant THOWs in a wide range of sizes, including multi-loft models designed for families or rental use. Their Washington builds are DMV-registerable as travel trailers and designed to meet both seasonal and long-term occupancy needs.
tinymountainhouses.com
Big Bliss Tiny Homes
Location: Washington
Focus: Boutique, design-forward THOWs
A smaller builder known for creative layouts and modern design, Big Bliss Tiny Homes offers flexible configurations suited for guest units, ADUs, or off-grid setups. All builds are inspected to meet safety and hookup standards under Washington L&I requirements.
Washington’s tiny home scene is built on practicality: real insulation, real hookups, and real compliance.
Most of these builders design with L&I, ANSI, and local zoning in mind—helping owners avoid costly retrofits or permit delays.
Before you buy, confirm your county’s stance on long-term THOW occupancy, and make sure your builder provides factory inspection labels or RVIA certification for peace of mind.
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