Tiny homes in Bellevue, Washington — zoning rules, THOW parking, builder costs, and what you need to know before buying.
Last researched May 2026
Bellevue is one of the most expensive markets on the east side of Lake Washington, but its new middle-housing and ADU rules make detached backyard units genuinely viable on lots that used to be locked into single-family use. Buyers here are typically trading price for walkable neighborhoods, top-rated schools, direct light rail to Seattle via the 2 Line, and quick access to the Cascade foothills. Climate is mild PNW temperate with heavy tree canopy and wet winters.
Bellevue adopted middle-housing and ADU code amendments in 2025 to comply with HB 1110 and HB 1337. In former single-family districts (R-1 through R-7.5), property owners can now build up to four units per lot — or six units per lot within a quarter-mile walk of a major transit stop, or when two of the units are income-restricted. Housing types include duplexes, triplexes, fourplexes, cottage clusters, townhouses, and stacked flats.
Separately, HB 1337 requires Bellevue to allow up to two ADUs per lot on any legally established single-family parcel, with a 1,000 sq ft minimum allowance per ADU, no owner-occupancy requirement, and capped impact fees. Tiny houses on wheels remain classified as RVs under Washington law, so full-time THOW occupancy on Bellevue residential lots is not permitted — foundation-built IRC Appendix Q tiny homes permitted as ADUs are the practical path in the city.
Verify current requirements with your local planning department before purchasing land or beginning construction.
Verify current requirements with your local planning department.
Two ADUs per lot permitted under HB 1337, up to at least 1,000 sq ft each, attached or detached or a combination. No owner-occupancy requirement, no additional parking mandate in most zones, and impact fees capped at 50% of the principal unit's fee. Height must be allowed up to at least 24 feet. ADUs can be sold as separate condominium units. Bellevue's middle-housing code additionally allows up to four (or six, near transit) units per lot in former R-1 through R-7.5 zones.
Communities, RV parks, and parking options in and near Bellevue.
THOW full-time occupancy is not allowed on private residential lots in Bellevue. The city treats THOWs as RVs, and there are no licensed long-term THOW parks inside the city limits. Buyers interested in movable tiny homes typically look east toward more rural King County or Snohomish/Kittitas County parcels, where private-lot hosting occasionally exists. Seattle-exurb private-lot parking, when available, runs $1,000-$1,200/mo.
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Bellevue, WA (off I-90, ~10 miles east of Seattle)
Long-running Bellevue RV park accepting extended stays with a 3-month minimum; RVs must be 10 years old or newer. Indoor pool, dog run, and family amenities on-site.
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Bellevue, WA (Lake Sammamish)
Lakefront RV park on Lake Sammamish offering monthly stays by request and approval; partial- and full-hookup sites with 30-amp service.
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Issaquah, WA (~8 miles east of Bellevue)
56-site RV park near downtown Issaquah that offers month-to-month rates October 1 - April 30; requires RVs in excellent condition, 10 years old or newer.
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Preston/Issaquah, WA (~20 miles east of Bellevue, off I-90)
Full-hookup RV park at the base of Tiger Mountain with a formal monthly application process for long-term residents.
Buckley, Washington
Buckley-based builder and one of Washington's first to embrace L&I factory inspection. Builds ANSI 119.5 certified THOWs, park models, and modular tiny homes. CEO Todd McKellips also serves as executive director of the Washington Tiny House Association.
Service areas: Washington, Oregon, California
Portland, Oregon
Portland-based luxury tiny home builder featured on national television. Family-owned company offering fully custom THOWs, park models, ADUs, and commercial builds. Signature Series starts at $129,900. Builds designed for Oregon's climate with moisture resistance and thermal insulation.
Service areas: Oregon, Washington, California
Eugene, Oregon
Eugene-based luxury tiny home builder with over 300 handcrafted homes delivered. Family-owned company with PHIUS and LEED backgrounds emphasizing sustainable building practices. Offers both signature models and fully custom builds with financing starting at $697/month.
Service areas: Oregon, Washington, California
Bellingham, washington
Bellingham-area builder crafting custom tiny homes, park models, and ADUs since 2011. Builds to IRC Appendix AQ and Washington State Energy Code. Over 40 tiny homes built for the Wildwood Lakefront Cottages community on Lake Whatcom.
Service areas: washington
Battle Ground, washington
Battle Ground factory builder producing modular tiny homes, ADUs, and single-family homes. Over 500 homes placed in five years. New 21,000 sq ft factory doubles production capacity to two homes per week.
Service areas: washington, oregon, california, montana, idaho
Spokane, Washington
Spokane franchisee of Anchored Tiny Homes, the only national ADU franchise, opened in 2024 by local entrepreneur Matt Goodwin. Builds stick-framed detached and attached ADUs ranging from 240 to 1,200 sq ft across the Inland Northwest. As of May 2026, pricing runs $90,000–$200,000 depending on size and finishes.
Service areas: Washington, Idaho
A comparison between tiny-home living and conventional homeownership in Bellevue.
Tiny home path
Traditional home path
Potential monthly savings
Verified links for planning, permitting, and community connections in Bellevue.
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