Johnson County, IA Fence Regulations: Fence Permit Requirements (2026)
Key Facts
- Permit-exempt fence height
- 7 feet or under
- Fences requiring a permit
- Over 7 feet tall
- Zoning height caps still apply
- 6 ft. boundary / 8 ft. interior
- Governing code
- 2021 IBC/IRC § 105.2/R105.2
- First-offense penalty
- Up to $750 civil infraction
Summary
Johnson County's building code exempts fences seven feet tall or shorter from needing a building permit at all, so most residential fences, capped at six or eight feet under the zoning code, never trigger permitting, while a taller fence still requires one.
105.2/R105.2 Work Exempt from a Permit. A permit shall not be required for the following: Building: ... 2. Fences not over seven (7) feet high. ... Exemption from the permit requirements of this Code shall not be deemed to grant authorization for any work to be done in a manner in violation of the provisions of this Code or any other laws or ordinances of this jurisdiction.
Official source re-checked September 7, 2026: the cited page had not changed since it was quoted.
Full Breakdown
2 lists work exempt from a permit. Item two on that list is explicit: fences not over seven feet high do not need a building permit. Because the UDO's own zoning fence rules cap ordinary boundary fences at six feet and interior fences at eight feet on average, nearly every fence a homeowner builds falls within, or just at, the seven-foot exemption threshold, meaning most fence projects in unincorporated Johnson County can proceed without a building permit application. A fence built taller than seven feet, which would already need Zoning Administrator approval to exceed the eight-foot interior-fence cap, crosses into permit-required territory under Chapter 8:6 and must go through the county's building permit process before construction. 25(E).
Violations & Fines
Building a fence over seven feet without first obtaining a building permit is enforceable under Chapter 8:8 as a County Infraction, and the Zoning Administrator can issue a stop-work order until the permit is secured. A first offense carries a civil penalty up to $750, rising to $1,000 for a repeat violation, and each day the unpermitted fence remains standing can count as a separate offense.
Frequently Asked Questions
Do I need a permit to build a fence in unincorporated Johnson County?
When would a fence actually need a building permit?
If my fence is permit-exempt, do I still have to follow the height and setback rules?
Sources & Official References
Other rules in Johnson County
Compare Johnson County to another location·View the Iowa fence regulations overview
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