Iowa has no statewide cap on residential fence height. In unincorporated Linn County, fences are regulated through Chapter 107 of the County Code (the Unified Development Code) and through the county's zoning and building permit framework administered by Linn County Planning & Development. Property-line and partition fences between rural neighbors are also subject to Iowa Code Chapter 359A (partition fence law). For exact fence height, setback, and corner-lot sight-triangle limits in your zone, contact Linn County Planning & Development at 319-892-5130.
Linn County regulates fences through Chapter 107 - Unified Development Code - which contains the General Regulations (Article V) covering accessory features such as walls and fences. Specific maximum heights vary by zone district (A, AG, RR, R, C, I, etc.), by yard (front, side, rear, corner-lot street side), and by whether the fence is solid or open. Sight-distance triangles at intersections and driveways further limit fence height regardless of zone. Building permits are required when a fence is structural, exceeds the height threshold set by the adopted International Residential Code, or is part of a pool enclosure. Iowa Code Chapter 359A, the partition-fence law, applies to lawful fences between adjoining rural landowners (typically agricultural land used for livestock) and provides a process for fence viewers to apportion construction and maintenance costs. Iowa has no statewide 'spite fence' statute - disputes over a malicious fence between neighbors are civil matters. Cities inside Linn County (Cedar Rapids, Marion, Hiawatha, Robins, Fairfax, Mount Vernon, Lisbon, Center Point, Walker, Springville, Coggon, Ely, Bertram, Palo, Alburnett, Central City) each adopt their own fence height rules in their zoning codes - typically lower in front yards and taller (often six feet) in side and rear yards - that supersede county rules within corporate limits.
Building a fence in unincorporated Linn County that exceeds the zone height limit, encroaches into a sight-distance triangle, or is built without a required permit can trigger a code-compliance notice from Linn County Planning & Development. Owners may be required to lower or remove the fence, apply for an after-the-fact permit, or obtain a variance through the Board of Adjustment. Fence-related disputes between neighbors over partition fences are handled administratively by the county fence viewers under Iowa Code Chapter 359A.
See how Linn County's height limits rules stack up against other locations.
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