Is your property in a Fire Hazard Severity Zone?

California doesn't treat fire risk as a vibe — it's a map, drawn parcel by parcel, and in 2025 that map got its first comprehensive redraw in nearly two decades. A lot of property owners are in a designated hazard zone today who weren't two years ago, and the designation carries real obligations. Here's how to check, and what it means if you're in one.

What the zones are

The State Fire Marshal classifies land into Fire Hazard Severity Zones — moderate, high, and very high — based on fuels, terrain, weather, fire history, and ember production. Separately, every parcel sits in either a State Responsibility Area (CAL FIRE protects it) or a Local Responsibility Area (your city/county fire agency does). The combination of zone and responsibility area determines which rules apply to you.

What changed in 2025

Between February and March 2025, CAL FIRE rolled out updated zone maps for local responsibility areas — the first comprehensive revision since 2007. The new maps added roughly 1.4 million acres to high and very high zones statewide, and for the first time mapped moderate and high LRA zones (previously only "very high" was mapped locally). Cities and counties were required to adopt the new zones by ordinance within 120 days, and they're not allowed to downgrade the state's designation. Translation: many suburban and even coastal properties got their first official hazard designation in 2025.

How to check your parcel (two minutes)

Go to the State Fire Marshal's Fire Hazard Severity Zone viewer at osfm.fire.ca.gov and enter your address. You'll see your zone class and responsibility area. Your city or county planning department holds the locally adopted version, which is the legally operative one in LRAs.

What a designation triggers

• Defensible space: in SRAs and very-high LRA zones, PRC 4291's 100-foot requirement applies, with inspections. The coming Zone 0 ember-resistant rules phase in by hazard class.
• Building standards: new construction and major remodels in designated zones must meet Chapter 7A wildfire-resistant building codes (vents, roofing, decking).
• Disclosure: sellers must disclose hazard-zone status in real estate transactions — it follows the parcel, not the owner.
• Insurance: carriers don't use the state map directly (they run their own models), but the designations correlate strongly with what underwriters and the FAIR Plan see.

If you just landed in a zone

Don't panic — the map measures hazard, not doom, and the obligations are mostly about maintenance. Work through our free defensible-space checklist zone by zone. If your parcel's outer 70 feet is steep, brushy, or overgrown — the usual reason properties get flagged — that's the part targeted grazing handles efficiently, and getting it done before your first inspection beats doing it after a correction notice.

The bottom line

The 2025 maps moved a lot of Californians from "fire country adjacent" to officially designated. Check your parcel, learn which rules attach, and treat the designation as what it is: the state telling you, with data, exactly which part of your property needs attention.