Solano County, CA Landscaping Rules: Grass Height Limits (2026)

Solano County's code does not contain a fixed grass-height number for ordinary residential lawns. Chapter 10 (Abatement of Public Nuisances) of the Solano County Code declares that any condition meeting the definition of a nuisance under California Civil Code Sections 3479 and 3480, or any violation of the County Code, is a public nuisance subject to abatement; tall, dead, or rank vegetation that creates a fire hazard, harbors vermin, or is otherwise injurious to health can be pursued through that process rather than through a numeric height cap. The Chapter 10 enforcement officer is the director of the Department of Resource Management (or designee). For unincorporated parcels in the State Responsibility Area, the operative standard is California Public Resources Code Section 4291, which requires 100 feet of defensible space around structures and the reduction of flammable vegetation - this functions as the practical 'cut your weeds' rule for rural Solano County rather than a lawn-height ordinance. Property owners should distinguish: a manicured but slightly long suburban lawn is generally not a county violation, whereas dry grass and brush near a home in a wildland area is enforceable under PRC 4291 and local fire-district inspection.