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Black Hawk County, IA Accessory Structures: Tiny Homes (2026)

Significant Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 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.

These county ordinances apply to unincorporated areas of Black Hawk County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

“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?
Only if it is eight feet wide or less and qualifies as a recreational vehicle, or if you place it in a licensed mobile home park. Under BHCC 18.10.010, a wider unit is legally a mobile home, and BHCC 18.95.010 confines mobile homes used for dwelling purposes to approved parks outside a few narrow exceptions.
Are there exceptions letting me put a mobile or tiny home on a regular residential lot?
Yes. A mobile home can serve as a farm's principal dwelling, or as a second unit for an immediate family member actively farming; as temporary quarters during construction of a permanent home; as a temporary office for up to 180 days; or for up to 18 months as post-disaster emergency housing, per BHCC 18.95.010(C).
How do I get a mobile home park approved in the county?
File a written application with the County Zoning Commission covering the site's legal description, a site plan, and the written consent of 75 percent of property owners within 200 feet. The Commission recommends and the Board of Supervisors grants or denies it, per BHCC 18.95.010(B).
What happens if I place a tiny or mobile home illegally?
It is a county infraction under BHCC 18.145.010, punishable by a $250 fine for a first offense, $500 for a second, and $750 for a third or subsequent offense, and the Board of Supervisors can also sue to force removal under BHCC 18.140.010.

Sources & Official References

Other rules in Black Hawk County

All Black Hawk County rules

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