Bolthole Index county-legal census · checked 2026-09-25
2 of Washington's 39 counties — 5% — allow tiny homes as a dwelling. That is the 6th-largest count of any state. The strongest of them on the Bolthole Index is Chelan County (52/100). Every entry below cites the county’s own official source.
Rules change, and cities inside these counties set their own — treat this as a verified starting point, not legal advice. All 357 counties nationwide → Washington: no zoning → Washington: owner-builder → Full Washington profile →
2 of 39 Washington counties · sorted by Index score
Tiny houses used as permanent dwelling units in unincorporated Chelan County. Tiny houses are regulated by Washington State Residential Code Appendix Q. Off-site tiny houses on …
Building Division Frequently Asked Questions ↗Site-built, factory-built, and park-model tiny homes in unincorporated Pierce County. A site-built tiny home is less than 400 square feet, excluding sleeping-loft area, and must…
Tiny Homes ↗Every county here has a full profile — water, land prices, hazard safety, seclusion, and the rest of its building rules. See the Washington state page for all 39 counties ranked, or go back to the national list.
Off-grid gear
Building on land in one of these Washington counties? The kit we'd start with:
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General guidance, not legal advice. Off-grid, building, and land-use rules are often set at the county level and change often. Verify with your county and state before acting. Data reviewed 2026-06-26.
