Walnut Creek's Public Nuisance ordinance treats overgrown grass and weeds exceeding roughly 12 inches as a nuisance when they create fire hazards or harbor vermin. In fire hazard areas, ConFire requires grass to be maintained below 4 inches during fire season under PRC 4291 defensible space rules.
Walnut Creek Municipal Code follows California Government Code Sections 39560β39588 authorizing cities to abate weeds and overgrown vegetation as public nuisances, and Health & Safety Code Section 14875. In general urban areas, code enforcement considers grass and weeds over 12 inches a violation when they present a fire hazard, harbor rodents, create unsightly conditions, or encroach on public sidewalks. In Very High Fire Hazard Severity Zones in the city's eastern hills, ConFire enforces stricter standards under PRC 4291: grass must be mowed to 4 inches or less within the 100-foot defensible space zone, typically starting in late spring before fire season declaration (usually MayβJune) and maintained through the first significant rains. Code Enforcement or ConFire issues a courtesy notice first; if not corrected within the stated period (commonly 10β30 days), the city may perform abatement and place a lien on the property for the cost plus administrative penalties. Vacant lots and foreclosures are particular focal points. Artificial turf and drought-tolerant groundcovers are acceptable alternatives and preferred under California's water conservation framework.
Contact your local code enforcement office for specific penalty information.
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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 Walnut Creek's grass height limits rules stack up against other locations.
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