San Diego County, CA Landscaping Rules: Weed Ordinances (2026)
Key Facts
- Governing ordinance
- Combustible Vegetation Ordinance, Code 68.401-68.406
- Legal status of weeds
- Declared a fire-hazard public nuisance
- Enforcer
- County Fire Warden
- Defensible space
- Clear weeds/brush within 100 ft of structures
- Cost recovery
- County abatement costs become a lien
- State backstop
- PRC 4291 defensible-space mandate also applies
Summary
Unincorporated San Diego County's Combustible Vegetation and Other Flammable Materials Ordinance (County Code 68.401-68.406) treats accumulations of weeds, dead vegetation, green waste, and rubbish as a fire-hazard public nuisance. The Fire Warden may order abatement, and unabated hazards can be cleared by the County at the owner's cost.
5004. “Noxious weed” means any species of plant that is, or is liable to be, troublesome, aggressive, intrusive, detrimental, or destructive to agriculture, silviculture, or important native species, and difficult to control or eradicate, which the director, by regulation, designates to be a noxious weed. In determining whether or not a species shall be designated a noxious weed for the purposes of protecting silviculture or important native plant species, the director shall not make that designation if the designation will be detrimental to agriculture. (Amended by Stats. 1992, Ch. 556, Sec. 1. Effective January 1, 1993.)
Full Breakdown
Weeds and combustible vegetation in unincorporated San Diego County are regulated primarily as a fire hazard. 406, finds that the accumulation of combustible vegetation, dead, dying or diseased trees, green waste, rubbish, and other flammable materials on private property creates a fire hazard injurious to public health, safety, and welfare, and declares such conditions a public nuisance subject to abatement. When such materials are allowed to grow or accumulate on a parcel, or on adjacent sidewalks, parking areas, or streets, so as to endanger improvements or neighboring property, the Fire Warden may declare a public nuisance and proceed under the County's Public Nuisance Abatement Procedure.
These provisions apply in unincorporated areas not within an organized fire protection district; within a district, the district's own weed-abatement program and annual notices govern. The abatement program ties into defensible-space requirements that call for clearing dead and dying grasses, weeds, brush, and combustible vegetation within 100 feet of structures. The process generally includes notice to the owner, an opportunity to abate, and, if the owner fails to act, County abatement with costs recovered. This is in addition to California's Public Resources Code section 4291 statewide defensible-space mandate.
Violations & Fines
Failure to abate after notice allows the County to clear the hazard and assess all abatement and administrative costs against the owner, which can become a special assessment or lien on the property. Repeat or willful violations may incur additional penalties.
Frequently Asked Questions
What triggers weed abatement in unincorporated San Diego County?
What happens if I ignore a weed-abatement notice?
Sources & Official References
Other rules in San Diego County
How San Diego County compares: Cities with the Strictest Weed and Property Maintenance Rules·California rules heatmap·Compare San Diego County to another location·View the California landscaping rules overview
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