Napa, CA Property Maintenance: Property Blight (2026)

The City of Napa's anti-blight authority is codified in Napa Municipal Code Chapter 8.16 (Public Nuisances). Section 8.16.040 (Property-Related Nuisances) makes it unlawful for a responsible person to maintain real property in a manner that creates listed nuisance conditions, including: any accumulation, disposal, or keeping of dirt, sand, gravel, concrete, solid waste, or similar materials for an unreasonable period (typically 72+ consecutive hours visible from a public street) outside an active permitted construction project; dead, decayed, diseased, or hazardous trees, weeds, and overgrown vegetation that remain 72+ hours and pose a hazard to pedestrian or vehicular traffic; the leaving of any garbage can or refuse container in a public street for more than 48 hours after collection day; abandoned, wrecked, dismantled, or inoperative vehicles or vehicle parts on private property visible from a public street; unauthorized accumulations of hazardous waste (pooled oil, grease, oil flow onto rights-of-way); and conditions that constitute violations of building, housing, or zoning codes. Enforcement is by the City of Napa Code Enforcement Division (Community Development Department), which issues written notices to appear or abate under Chapter 8.16. Where conditions also meet the definition of 'substandard housing' under California Health & Safety Code §17920.3 — dampness, infestation, inadequate sanitation, structural hazards, or general dilapidation — state law supplies parallel abatement authority through the local building official. Unpaid abatement costs become a special assessment on the parcel collectible with property taxes, senior to most private liens.