Riverside, CA Landscaping Rules: Grass Height Limits (2026)

The City of Riverside does not codify a numeric maximum lawn height (no '6-inch' or '12-inch' rule like some California cities). Overgrown vegetation is instead treated as a discretionary public nuisance under Riverside Municipal Code (RMC) Chapter 6.15 — Abatement of Public Nuisances — and Chapter 6.14 — Property Maintenance. The Code Enforcement Division of the Community & Economic Development Department (CEDD) is 'tasked with enforcing the City's Municipal Code related to such matters as zoning, substandard housing, public nuisances, property maintenance, abandoned vehicles and other quality of life issues' (City of Riverside, CEDD Code Enforcement Teams page). The City's Public Works Streets/Weeds page is explicit on who is responsible: 'Weeds on private property, in right-of-way areas bordering a residence and in the alleys from the back of the resident's property to the center line of the alley are the responsibility of the property owner.' For parcels in or adjacent to designated very-high fire-hazard severity zones (much of the Box Springs / Sycamore Canyon hillsides), Riverside County Ordinance No. 695 (Hazardous Vegetation Abatement) and County Fire Department Ordinance No. 787 add a separate fuel-modification requirement that supersedes the City's discretionary standard. Practical CEDD enforcement targets weeds and grass taller than roughly 6 inches when accompanied by other nuisance indicators (trash, harborage, fire fuel).