Rock County itself sets no countywide maximum grass height. Turfgrass mowing limits are a city or village matter (Janesville, Beloit, etc.), not county code. State law only compels destruction of noxious weeds, not routine lawn mowing.
There is no Rock County ordinance capping the height of ordinary turfgrass. In Wisconsin, weed and grass mowing thresholds are enacted by individual cities, villages and towns, so the limit that applies to you comes from your municipality's nuisance or weed ordinance (commonly 8 inches). The only county-relevant state hook is Wis. Stat. 66.0407, which requires landowners to destroy statutorily-defined noxious weeds, not to mow a lawn to a set height. Check your city, village or town clerk for the local grass-length number and enforcement process.
Enforcement is municipal. Cities/villages that set a height (often 8 in.) typically issue notice, then abate and bill the owner, added to the tax roll.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Rock County, WI
Wisconsin's cruelty statute (Ch. 951) makes it illegal to keep animals without proper food, water, and shelter, which is how hoarding is enforced. Rock Count...
Rock County, WI
Rock County has no blanket countywide wildlife-feeding ban, but deer and elk feeding is regulated statewide, and nuisance-feeding of wild animals is addresse...
Rock County, WI
Rock County parks close overnight. State law (Wis. Stat. 27.05) empowers the county to set park rules and penalties, and Rock County Parks posts closing hour...
Rock County, WI
Rock County has no county-wide light-trespass ordinance. Glare or spillover from a neighbor's outdoor lights is generally handled as a private nuisance, or u...
Rock County, WI
Rock County has no general dark-sky lighting ordinance, and neither does the City of Janesville. Outdoor lighting is mainly addressed through zoning conditio...
Rock County, WI
In Rock County, garage-sale signs can't legally go in the street or highway right-of-way. Wis. Stat. 86.19 bars any sign within street limits except traffic ...
See how Rock County's grass height limits rules stack up against other locations.
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