In unincorporated Contra Costa County, no one may maintain weeds, grass, or similar vegetation exceeding 18 inches in height on private property under Ordinance Code § 720-2.006.
Contra Costa County Ordinance Code § 720-2.006 establishes the county-wide maximum height for weeds and overgrown vegetation on private property at 18 inches. The provision is enforced as both a fire-hazard rule (by the Contra Costa County Fire Protection District during the annual exterior hazard abatement program) and a public-nuisance rule (by County Code Enforcement). For the 2026 season, Con Fire set abatement deadlines of May 15 for East County and June 1 for Central and West County. After the deadline, properties may be inspected, and if the owner has not complied, the County or Fire District may abate the hazard at the owner's expense and place the costs as a lien on the property.
Failure to abate by the deadline can result in an administrative citation, recovery of the actual abatement costs by the County/Fire District, plus an administrative fee added as a special assessment / lien against the parcel. Repeated violations may be charged as infractions or misdemeanors under County Code Title 1.
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Contra Costa County, CA
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Side-by-side rule comparisons with other cities in Contra Costa County.
See how other cities in Contra Costa County handle grass height limits.
See how El Cerrito's grass height limits rules stack up against other locations.
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