Rock County's zoning authority (Chapter 4) covers shoreland, floodplain, airport overlay, and highway access, not general residential fence heights. Fence height is set by each city, village, or town under Wis. Stat. §§59.69, 60.61-62, and 62.23.
Rock County does not impose a countywide residential fence height limit. The county's land use ordinances (Chapter 4 series) regulate land division, shoreland zoning, floodplain zoning, airport overlay zones, and highway access — none of which set general fence heights. Janesville and Beloit administer their own zoning codes with typical residential limits of 4 feet in front yards and 6 feet in side and rear yards (taller fences may require a permit). Towns in Rock County (Beloit, Janesville, Milton, Turtle, Fulton, Magnolia, etc.) administer zoning under Wis. Stat. §§60.61-60.62; some towns adopt the Town of Magnolia-style zoning ordinance and others rely on county rural zoning. Wis. Stat. §90.03 governs partition (line) fences — adjoining rural property owners share equal cost and maintenance responsibility for a line fence unless they agree otherwise. Always check with the municipal zoning or building inspector before constructing a fence.
Each municipality enforces fence violations independently. Typical penalties range from $50 to $500 plus required corrective action (lowering or removal). A permit is often required for fences over 6 feet under municipal codes.
See how Rock County's height limits rules stack up against other locations.
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