Fire Regulations in Napa County, CA (2026)

2 county-level rules, plus city-specific rules for 1 city in Napa County, California.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Napa County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Brush Clearance

Napa County Code Chapter 8.36 (Fire Protection - Fire Hazard Abatement), as amended by Ordinance 1467, requires defensible space around all structures and treats unmaintained vegetation as a public nuisance subject to abatement. California Public Resources Code Section 4291 layers state-level 100-foot clearance requirements in the State Responsibility Area.

Napa County Defensible Space and Brush Clearance

Some Restrictions

Cal. Pub. Resources Code § 4291

4291. (a) A person who owns, leases, controls, operates, or maintains a building or structure in the state responsibility area shall at all times do all of the following: (1) (A) Maintain defensible space of 100 feet from each side and from the front and rear of the structure, but not beyond the property line, except as provided in subparagraph (B). The amount of fuel modification necessary sha...

Full ordinance details →Official source ↗

Wildfire Zones

Napa County contains extensive Very High Fire Hazard Severity Zones across the Vaca Mountains, Howell Mountain, Mount Veeder, and the Mayacamas Range, mapped by CAL FIRE under the 2025 Fire Hazard Severity Zone update. New construction in mapped zones must comply with California Building Code Chapter 7A wildfire-exposure standards, adopted locally through Napa County Code Chapter 15.32.

Napa County Wildfire Hazard Severity Zones

Some Restrictions

Cal. Pub. Resources Code §§ 4201-4204 (CAL FIRE Fire Hazard Severity Zones)

California's seasonally dry Mediterranean climate lends itself to wildfires, and in an effort to better prepare, CAL FIRE is required to classify the severity of fire hazard in areas of California. The History of Fire Hazard Severity Zone Maps Fire Hazard Severity Zone maps arose from major destructive fires, prompting the recognition of these areas and strategies to reduce wildfire risks. Legi...

Full ordinance details →Official source ↗

Fire Regulations by City in Napa County

1 cities in Napa County have their own fire regulations rules. Each link goes to that city's dedicated page with code citations.

NapaPop. 79,246

2 verified rules • Brush Clearance, Wildfire Zones

All Napa County ordinances

See every category we cover for Napa County: parking, noise, fences, fires, animals, pools, and more.

Napa County Ordinance Hub →