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.
Janesville, WI
Janesville regulates amplified music under the general noise ordinance. Sound amplification permits available for events. WI Stat. §947.01 applies.
Janesville, WI
Janesville considers excessive barking a nuisance. Animal control handles complaints. WI Stat. §174 covers dog regulation statewide.
Janesville, WI
Janesville enforces quiet hours as the Rock County seat (pop. 65,000). The former GM assembly plant city on the Rock River manages noise from remaining indus...
Janesville, WI
Janesville manages parking around the courthouse square, downtown, and Rock River recreation areas. Winter alternate-side parking enables efficient snow plow...
Janesville, WI
Janesville restricts commercial vehicle parking in residential zones. Weight, size, and signage limits apply. Overnight heavy truck storage prohibited.
Janesville, WI
Janesville requires vehicles parked on improved surfaces. Front lawn parking prohibited. Driveway modifications require permits.
See how Janesville's weeds & overgrown grass rules stack up against other locations.
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