Fairfield, CA Fire Regulations: Wildfire Zones (2026)
Key Facts
- Map Update
- OSFM February 2025
- Hill Neighborhoods
- Rockville, Green Valley, Cordelia ridge
- Building Code
- CBC Chapter 7A applies
- Roof Standard
- Class A required
- Disclosure
- AB 38 at sale for High/VHFHSZ
Summary
The 2025 CAL FIRE update placed portions of Fairfield's western hills (Rockville, Green Valley, Cordelia foothills) into Local Responsibility Area (LRA) High and Very High Fire Hazard Severity Zones. Properties in these zones face WUI building code requirements (Chapter 7A), defensible space inspections, and Class A roof rules.
Fire Hazard Severity Zone maps arose from major destructive fires, prompting the recognition of these areas and strategies to reduce wildfire risks. Legislative response led to mandated mapping across California under the California Public Resources Code 4201-4204, encompassing all State Responsibility Areas (SRA). What are Fire Hazard Severity Zones? The State Fire Marshal is mandated to classify lands within State Responsibility Areas into Fire Hazard Severity Zones (FHSZ). Fire Hazard Severity Zones fall into one of the following classifications: Moderate High Very High The California laws that require Fire Hazard Severity Zones include California Public Resources Code 4201-4204, California Code of Regulations Title 14, Section 1280 and California Government Code 51175-89.
Full Breakdown
On February 24, 2025, the Office of the State Fire Marshal released updated LRA Fire Hazard Severity Zone maps for Solano County. Fairfield, which controls its own LRA, has hillside neighborhoods in the western and northwestern portions of the city (near Rockville Hills Regional Park, Green Valley Road, the Mankas Corner foothills, and the Cordelia/Suisun ridge) that fall in High or Very High zones. Solano County's State Responsibility Area (SRA) contains 31,570 acres in the Very High hazard category, about 36.3% of the SRA. For parcels in any FHSZ tier within an LRA: California Building Code Chapter 7A (Materials and Construction Methods for Exterior Wildfire Exposure) applies to new construction and significant remodels, requiring ignition-resistant exterior wall coverings, ember-resistant vents, Class A roofs, and noncombustible siding. Defensible space inspection per PRC 4291 is mandatory. AB 38 disclosures must accompany real-estate sales of homes built before 2010 in a High or Very High zone.
Violations & Fines
Failure to maintain defensible space results in fines up to $500 plus contracted abatement costs billed to the property. Non-compliant construction in a Chapter 7A area can result in stop-work orders, refusal of certificate of occupancy, and potential loss of California FAIR Plan insurance eligibility.
Frequently Asked Questions
How do I check if my Fairfield property is in a Very High Fire Hazard Severity Zone?
Will my insurance be cancelled if my home is in a VHFHSZ?
Sources & Official References
Other rules in Fairfield
California rules heatmap·Compare Fairfield to another location·View the California fire regulations overview
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Wildfire Zones in Nearby Cities
How other cities in Solano County handle wildfire zones.