Simi Valley, CA Landscaping Rules: Grass Height Limits (2026)

There is no Simi Valley Municipal Code provision that establishes a specific maximum height (such as 6 inches or 12 inches) for lawn grass on residential property. The City's vegetation-control authority instead runs through the Fire Marshal's Weed Abatement Program. Every spring the Fire Marshal identifies properties where overgrown weeds present a potential fire hazard, notifies the property owner, and oversees the removal of the hazard either by the owner or by a public contractor. Property owners are required to remove all weeds, grasses, shrubs, or dead trees upon lots, parcels, or alley ways of land in the City of Simi Valley that pose a fire hazard, and have 30 days from notice to demonstrate compliance. The City recommends creating a defensible weed abatement space of at least 100 feet around structures by removing all dead and dying vegetation within that space, with a minimum space between vegetation that is three times the dimension of the tree, and fire-resistant landscaping (succulents, flower beds, rock) in a 30-foot diameter around the structure. California Health & Safety Code Section 14875 defines 'weeds' to include vegetation that 'is not pruned or is otherwise neglected so as to attain such large growth as to become, when dry, a fire menace to adjacent improved property' and dry grass, stubble, brush, or other flammable material that endangers public safety, and Sections 14875-14922 authorize cities to inspect, order work, and recover costs to abate the hazard.