Bolthole Index county-legal census · checked 2026-10-07
15 of Iowa's 99 counties — 15% — have no county-wide zoning. That is the 20th-largest count of any state. The strongest of them on the Bolthole Index is Lucas County (78/100). 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 1042 counties nationwide → Iowa: no building codes → Iowa: no codes, no zoning → Iowa: owner-builder → Iowa: rv living → Iowa: tiny homes → Iowa: no minimum home size → Full Iowa profile →
From the Iowa guide
Iowa has 15 counties without county zoning and 81 with county zoning.310 The highest-scoring no-county-zoning choices begin with Lucas County, Jefferson County, Wayne County, Davis County, Lee County, Union County, Ringgold County, Des Moines County.3 Only 9 counties combine no residential building permit with no county zoning; compare the no-zoning list and no-building-codes-and-no-zoning list.11
County zoning authority is optional and applies outside city corporate limits.4 Where adopted, county zoning can regulate residential use of trailers and portable structures, while lot sizes and setbacks can differ by district.1920 Qualifying agricultural land and structures have a county-zoning exemption while used for agriculture, but floodplain activities remain subject to the statutory exception.21 Ask the county planning office to identify the parcel's district and whether the proposed use qualifies before relying on an agricultural exemption.421
From the Iowa guide, written from the cited official sources and re-checked by an independent reviewer. This is research, not legal advice: confirm with the office before you buy or build.
15 of 99 Iowa counties · sorted by Index score
The county's ordinance list includes only narrow airport tall-structure zoning, not a comprehensive countywide zoning ordinance for unincorporated land.
Lucas County Iowa - County Ordinances ↗County zoning regulation in unincorporated Jefferson County, Iowa. The source expressly excludes the City of Fairfield; municipal zoning may apply there.
Questions - Jefferson County Iowa Government ↗The county directs zoning-map questions to the Assessor's Office rather than a zoning administrator and publishes no county zoning ordinance, indicating no county zoning.
Wayne County - Where Do I Go For ↗The county lists no zoning or planning department and has not adopted county-wide zoning for unincorporated areas (only subdivision guidance exists); municipalities administer t…
Davis County IA - County Offices ↗General county zoning administration by Union County, as described in the July 20, 2020 Board of Supervisors minutes. The statement appears in a discussion of Wind Turbine Ordin…
Union County Board of Supervisors Regular Session, July 20, 2020 ↗Lee County as a county government; this does not negate zoning adopted by incorporated municipalities or extended into unincorporated areas under Iowa Code section 414.23. The c…
Lee County Code of Ordinances ↗The county's official ordinance page lists no zoning ordinance (only Wind and Solar ordinances), and the county has no planning or zoning department.
Ringgold County Ordinances ↗County zoning in unincorporated Des Moines County outside the County Zoning Ordinance's designated two-mile jurisdiction around Burlington. The County Zoning Ordinance applies w…
Land Use Department - Des Moines County Government - Iowa ↗County zoning permits for uses and building projects in the unincorporated areas of Washington County, Iowa. The county's former Zoning Ordinance was rescinded in 2013. Floodpla…
Rural Building & Development Permits ↗General county zoning in unincorporated Taylor County, Iowa The county plan separately identifies incorporated cities and their ordinances. This finding does not eliminate stand…
Taylor County Hazard Mitigation Plan 2022 ↗The county's ordinance list includes only a Paullina Municipal Airport height/land-use overlay, with no comprehensive county-wide zoning ordinance.
O'Brien County Board of Supervisors - Ordinances ↗County zoning ordinance in Chickasaw County, including the county's unincorporated areas. The county Land Use office applies the county subdivision ordinance to divisions of pro…
Land Use Office - Chickasaw County Government - Iowa ↗General countywide zoning administered by Adair County, including the rural and unincorporated county area. The county has specialized land-use controls, including airport-heigh…
March 31, 2021 Board of Supervisors Minutes ↗County zoning across Iowa County, including unincorporated areas The official county page states that Iowa County is not regulated by zoning laws generally. Zoning-related excep…
Zoning - Iowa County Government ↗County zoning in Hamilton County's unincorporated areas. The county directs residents to contact individual towns for zoning.
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.
