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

Unlike many cities, the Humboldt County Code does not state a specific maximum lawn or grass height for residential parcels. Tall, dead, or dry grass becomes enforceable in two main ways. First, under Humboldt County Code section 351 et seq. (Abatement of Public Nuisances) - as amended by Ordinance 2457 - any condition declared by state statute or county ordinance to be a nuisance can be ordered abated by the Code Enforcement Unit; vegetation that creates a fire, vermin, or sanitation hazard is routinely abated under this chapter. Second, under California Public Resources Code section 4291, owners of structures in State Responsibility Areas (which cover most of unincorporated Humboldt County) must maintain 100 feet of defensible space, with the 5-30 foot 'lean, clean and green' zone meaning grasses are kept short and dry vegetation removed. State Government Code section 25845 confirms the county's authority to abate any nuisance by ordinance after notice and hearing, with cost recovery through special assessment or lien. Cal Fire and local fire-safe councils enforce defensible-space requirements seasonally; the county also relies on the Agricultural Commissioner for state-listed noxious weeds (Food & Agric. Code section 5004).