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

Weed and vegetation rules in unincorporated Modoc County are about wildfire safety and nuisance abatement rather than lawn appearance. No fetched County source set a specific maximum grass or weed height. Because much of the county lies within a CAL FIRE State Responsibility Area served by the Lassen-Modoc Unit, California Public Resources Code section 4291 governs vegetation around buildings: an owner of a structure in the SRA must maintain defensible space of 100 feet from each side and from the front and rear of the structure (but not beyond the property line). CAL FIRE divides this into zones — an immediate Zone 0 (0-5 ft), a lean-and-clean Zone 1 (out to 30 ft), and a reduced-fuel Zone 2 (30-100 ft) — and directs that dead and dying grass, weeds, and combustible debris be cleared, with annual grasses cut low. The County's own role comes through Title 8 nuisance abatement: badly overgrown, debris-laden parcels can be addressed as public nuisances (Chapters 8.20 / 8.50) with cost recovery, and Chapter 18.110 of the zoning code separately bars accumulation of trash or rubbish on any lot or parcel and restricts long-term storage of inoperative vehicles. Penalties for failing to maintain defensible space are set by state law and enforced by CAL FIRE; local fire districts and the Modoc Fire Safe Council promote additional clearance standards through the County's Community Wildfire Protection Plan. Residents should confirm current defensible-space requirements with the CAL FIRE Lassen-Modoc Unit or their local fire district before fire season.