Black Hawk County, IA Accessory Structures: Tiny Homes (2026)
Tiny home rules in Black Hawk County, IA, covering tiny houses on wheels (THOWs), park model RVs, and tiny home on foundation builds, determine where they are legal and how they get permitted.
Key Facts
- Width threshold
- over 8 ft wide = mobile home, not RV
- Default placement
- mobile home parks only
- Park approval
- 75% of neighbors within 200 ft must consent
- Construction-quarters exception
- Commission sets expiration date
- Temporary office permit
- max 180 days
- Post-disaster exception
- max 18 months on-lot
- First-offense fine
- $250
Summary
In unincorporated Black Hawk County, Iowa, a tiny home wider than eight feet is legally a mobile home, not a recreational vehicle. County code confines mobile homes used for dwelling purposes to approved mobile home parks unless the placement fits one of a handful of narrow exceptions.
“Recreational vehicles or tiny homes wider than eight feet shall be considered a mobile home and not a recreational vehicle.” ... “Mobile home ... s to be used for dwelling purposes shall be placed only in mobile home parks except as may be herewith set forth. A mobile home park may be established in only designated districts provided a permit is secured as set forth herein.”
Full Breakdown
95. 010, a mobile home used for dwelling purposes may be placed only in a licensed mobile home park, and a new park may be established only in a designated district after a permit is secured. To open a park, an applicant files a written application with the County Zoning Commission that includes the site's legal description, a site plan and the written consent of 75 percent of the property owners within 200 feet of the site. The Zoning Commission forwards a recommendation to the Board of Supervisors, which grants or denies the application; construction cannot begin until the Administrative Officer receives proof of Iowa Department of Health compliance covering lot and street layout, sewage disposal, water supply and electrical distribution.
Outside a park, a mobile home (and by extension an oversized tiny home) may be placed only in limited circumstances: as the principal dwelling on a farm, or as a second unit for an immediate family member actively engaged in the farm's agricultural operation; as temporary living quarters during construction of a permanent dwelling, with the Zoning Commission setting the expiration date; as a temporary office for up to 180 days; or, after a natural disaster, as on-lot emergency housing for up to 18 months while the owner's home is rebuilt, subject to written approval from the Zoning Administrator and a 30-day deadline to pull a reconstruction permit.
Violations & Fines
Zoning violations, including an unpermitted mobile home or oversized tiny home placement, are county infractions under BHCC 18.145.010: a $250 fine for a first offense, $500 for a second, and $750 for a third or subsequent offense. The Board of Supervisors' Administrative Officer, appointed under BHCC 18.140.010, may also sue to stop construction, restrain the use, or block occupancy of a noncompliant structure.
Frequently Asked Questions
Can I put a tiny home on wheels on my land in unincorporated Black Hawk County?
Are there exceptions letting me put a mobile or tiny home on a regular residential lot?
How do I get a mobile home park approved in the county?
What happens if I place a tiny or mobile home illegally?
Sources & Official References
Other rules in Black Hawk County
Compare Black Hawk County to another location·View the Iowa accessory structures overview
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