Grass Valley, CA Property Maintenance: Weeds & Overgrown Grass (2026)

Unlike many cities, unincorporated Nevada County does not publish a simple ornamental 'grass height' rule; weeds and overgrown vegetation are regulated primarily through fire-safety law because the county lies in a high fire-hazard region. The County's Hazardous Vegetation Abatement Ordinance (Ordinance No. 2463) extends and supplements state law. California Public Resources Code 4291 requires 100 feet of defensible space to the property line around structures. The county ordinance encompasses the same PRC 4291 requirements but also addresses hazardous vegetation and combustible material abatement beyond the property line, ensuring defensible space is maintained on parcels adjacent to improved parcels and along emergency access and evacuation routes. It adds vegetation-maintenance requirements for private roadways not included in PRC 4291: along a private road that is a critical egress route, property owners must mitigate vegetation about 10 feet back from the roadside edge and limb trees up (the county references roughly 15 feet of vertical clearance for emergency vehicle access). Under Ordinance 2463, no parcel owner may allow vegetation on their property to interfere with street and emergency vehicle access, whether along a public street or a private residential access road. The ordinance applies only in the unincorporated county area, includes a fee structure, and was updated with increased fines and fees to motivate compliance. Enforcement runs through the Office of Emergency Services' Defensible Space Division, where unincorporated-county complaints are filed; the county inspects, seeks compliance, and can abate hazardous vegetation at the owner's expense if the owner fails to act.