Bolthole Index county-legal census · checked 2026-09-11
2 of Iowa's 99 counties — 2% — set no minimum dwelling size. That is the 8th-largest count of any state. The strongest of them on the Bolthole Index is Jefferson County (75/100). 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 60 counties nationwide → Iowa: no building codes → Iowa: no zoning → Iowa: no codes, no zoning → Iowa: owner-builder → Full Iowa profile →
2 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-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 ↗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.
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.
