Rock County has no countywide lawn-height limit, but Wisconsin's noxious-weed statute applies everywhere. Wis. Stat. §66.0407 requires landowners to destroy noxious weeds; the local weed commissioner can cut them and charge you. Tall-grass height limits are set by your city or village.
Two layers govern overgrowth. Statewide, Wis. Stat. §66.0407 makes noxious weeds a nuisance every landowner must destroy and empowers a municipal weed commissioner to enter and cut, billing the owner. Separately, ordinary tall grass (a numeric height like 8 inches) is capped by individual cities and villages such as Janesville and Beloit, not by Rock County. The county administers land-conservation and erosion programs but does not set a residential grass-height maximum. So for a mowing complaint, look to your municipality's property-maintenance code; for noxious weeds specifically, the state statute and local weed commissioner control.
Noxious weeds: under §66.0407 the weed commissioner may destroy them and assess costs to the owner as a special tax. Tall-grass height limits carry separate municipal fines and city-abatement charges.
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 encourages waste reduction and does not ban backyard composting. Wisconsin bans yard waste from landfills, so composting is favored. Nuisance con...
Rock County, WI
Rock County has no countywide ordinance regulating artificial turf. Whether synthetic grass is allowed, and any coverage or stormwater conditions, is decided...
Rock County, WI
Rock County does not ban native or naturalized landscaping, but the mandatory noxious-weed duty still applies. Near navigable water, native shoreland buffers...
Rock County, WI
Collecting rainwater is legal in Wisconsin and Rock County sets no barrier to rain barrels. There is no state permit for a basic downspout rain barrel used f...
See how Rock County's weeds & overgrown grass rules stack up against other locations.
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