FHSZ (Fire Hazard Severity Zone)
An FHSZ is a state-mapped designation — Moderate, High, or Very High — that CAL FIRE assigns based on terrain, vegetation, weather, and fire history, and it drives insurance, disclosure, and building-code requirements.
CAL FIRE and local fire agencies jointly maintain these maps, which apply to both State Responsibility Areas and Local Responsibility Areas inside city limits.
Sellers of property in a Very High FHSZ must disclose that status to buyers under California's Natural Hazard Disclosure requirements, and rebuilding in these zones often requires fire-hardened materials under the state's Chapter 7A building code, which adds real construction cost.
FHSZ designation affects insurance availability (often pushing owners toward the FAIR Plan), lender requirements, and buyer appetite generally — all reasons foothill and Sierra-adjacent sellers often find a direct cash sale simpler than a traditional listing burdened by disclosure and financing friction.
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