Bolthole Index county-legal census · checked 2026-10-07
6 of Iowa's 99 counties — 6% — set no minimum dwelling size. That is the 18th-largest count of any state. The strongest of them on the Bolthole Index is Jefferson County (77/100). 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 587 counties nationwide → Iowa: no building codes → Iowa: no zoning → Iowa: no codes, no zoning → Iowa: owner-builder → Iowa: rv living → Iowa: tiny homes → Full Iowa profile →
6 of 99 Iowa counties · sorted by Index score
County zoning-based minimum dwelling size requirements in unincorporated Jefferson County, excluding the City of Fairfield. The county states that zoning laws do not apply outsi…
Questions - Jefferson County Iowa Government ↗County zoning minimum-dwelling-size requirements in unincorporated Lee County outside areas subject to municipal zoning. The county code states that Lee County has not adopted a…
Lee County Code of Ordinances ↗County zoning minimum dwelling-size requirements for uses and building projects in unincorporated Washington County. The absence is limited to county zoning requirements. Other …
Zoning Ordinance (Rescinded on September 27, 2013) ↗County zoning-based minimum residential dwelling-size requirements in unincorporated Chickasaw County. The county's official Land Use page states that Chickasaw County does not …
Land Use Office - Chickasaw County Government - Iowa ↗County zoning minimum-dwelling-size controls in unincorporated Iowa County areas outside the stated zoning exceptions. The source addresses county zoning only; building, health,…
Zoning - Iowa County Government, Iowa ↗Minimum dwelling size rules that would arise solely from county zoning in unincorporated Hamilton County. Hamilton County states that it has no zoning in unincorporated areas. T…
hamiltoncounty.iowa.gov ↗Every county here has a full profile — water, land prices, hazard safety, seclusion, and the rest of its building rules. See the Iowa state page for all 99 counties ranked, or go back to the national list.
Off-grid gear
Building on land in one of these Iowa 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.
