Your property just appeared on the new FHSZ map. Here’s what it means and what you’re now required to do.
You opened a letter, checked a link, or heard from a neighbor — and now your property has a new Fire Hazard Severity Zone designation you didn’t have before. That designation has immediate legal and insurance consequences, and most homeowners don’t know which ones apply to them. This page tells you exactly what changed, what it requires, and what to do first.
Compliance obligations are immediate
A new Very High FHSZ designation triggers legal compliance obligations under PRC 4291 immediately. If your property is in a State Responsibility Area (SRA), you are now required by law to maintain 100 feet of defensible space. Failure to comply can result in fines — and if your home sells, escrow requirements that can derail a transaction.
What an FHSZ designation actually means
California’s Fire Hazard Severity Zone maps are maintained by CAL FIRE and define three levels of fire hazard: Moderate, High, and Very High. CAL FIRE’s updated SRA maps became effective April 1, 2024. The Office of the State Fire Marshal released recommended updated LRA maps on March 24, 2025, with local adoption and effective dates following. These updates reclassified a significant number of parcels across the state — many of them in San Diego County, where a significant portion of properties, and the majority of properties in East County communities, now sit within designated Very High Fire Hazard Severity Zones. Check your specific address at https://egis.fire.ca.gov/FHSZ.
The FHSZ map determines two things simultaneously: your legal obligations as a property owner, and your insurance company’s perception of your risk. These are separate problems that often arrive at the same time when a reclassification hits.
LRA map reclassifications are not always final
The State Fire Marshal’s 2025 LRA map updates were recommendations to local jurisdictions — not automatic reclassifications. Cities and counties must formally adopt these maps through their own processes, and adoption timelines vary. If your property is in an LRA (served by a local fire agency rather than CAL FIRE), confirm your jurisdiction’s current adoption status directly with your local fire agency or planning department before treating your reclassification as final. SRA reclassifications (CAL FIRE-served properties) became effective April 1, 2024 and do not require local adoption.
SRA vs. LRA — the designation that matters most
Your zone designation (High or Very High FHSZ) matters — but equally important is whether your property sits in a State Responsibility Area (SRA) or a Local Responsibility Area (LRA). This determines who has inspection authority over your property.
If you’re in an SRA — most unincorporated East County land including Alpine, Ramona, Julian, Descanso, Pine Valley, and Jamul — CAL FIRE’s San Diego Unit (SDU) conducts defensible space inspections.
If you’re in an LRA — incorporated cities and some county areas — your local fire agency handles inspections.
You can look up your SRA vs. LRA status and FHSZ designation in approximately 30 seconds using the CAL FIRE FHSZ Viewer. Type in your address. The result tells you your zone level and responsibility area. Do this first.
What your designation triggers
High FHSZ: Triggers defensible space requirements under PRC 4291 — 100 feet of managed clearance around all structures, divided into Zone 0 (0–5 ft), Zone 1 (5–30 ft), and Zone 2 (30–100 ft). Also triggers real estate disclosure obligations under AB 38 and Civil Code 1102.19 if you sell.
Very High FHSZ: Everything in High, plus Zone 0 compliance under AB 3074 — the five-foot ember-resistant perimeter around your structure. For existing properties in San Diego’s Very High FHSZ areas, the Zone 0 compliance deadline is February 2027. Insurance implications are also more significant at Very High — this is where most non-renewals are occurring in San Diego County.
Why the map changed — fire science
CAL FIRE’s FHSZ maps are built from fire behavior modeling that accounts for fuel type and density, slope, aspect, prevailing wind patterns, and ember transport distance. South and southwest-facing slopes in San Diego County — which receive maximum afternoon solar radiation and align with Santa Ana wind corridors — are among the highest-modeled risk terrains in California. Properties reclassified in the 2024 SRA and 2025 LRA updates were not necessarily reclassified because the vegetation changed. In many cases the modeling methodology improved to better capture how fire actually spreads through chaparral-covered drainages and ridge systems, and how embers travel ahead of the fire front. Research consistently shows embers are the dominant ignition source in wildfire home losses — in the 2007 Witch Creek Fire in San Diego’s East County, two out of three homes were ignited by wind-dispersed embers, not the fire front itself.
Why the map changed — fire science
CAL FIRE’s FHSZ maps are built from fire behavior modeling that accounts for fuel type and density, slope, aspect, prevailing wind patterns, and ember transport distance. South and southwest-facing slopes in San Diego County — which receive maximum afternoon solar radiation and align with Santa Ana wind corridors — are among the highest-modeled risk terrains in California. Properties reclassified in the 2024 SRA and 2025 LRA updates were not necessarily reclassified because the vegetation changed. In many cases the modeling methodology improved to better capture how fire actually spreads through chaparral-covered drainages and ridge systems, and how embers travel ahead of the fire front. Research consistently shows embers are the dominant ignition source in wildfire home losses — in the 2007 Witch Creek Fire in San Diego’s East County, two out of three homes were ignited by wind-dispersed embers, not the fire front itself.
What to do — in order
Confirm your designation and responsibility area
Go to egis.fire.ca.gov/FHSZ and look up your address. Screenshot the result. You need to know: (a) your FHSZ level — High or Very High; (b) whether you are in SRA or LRA; (c) which fire agency has jurisdiction. Write these down. Everything else flows from this.
Understand your immediate legal obligations
If your property is now in a High or Very High FHSZ within an SRA, you are subject to PRC 4291 — California’s base defensible space law. This requires 100 feet of defensible space (or to your property line), annual grasses cut to 4 inches maximum, branches raised to 6 feet above ground, ladder fuels eliminated, and 10 feet of clearance around wood piles. San Diego County’s Consolidated Fire Code is stricter: Zone 1 extends to 50 feet (not 30 feet), and Zone 0 is already in effect at the county level under Ordinance 10927 Section 4907.9.1.
Contact your insurance carrier immediately
Contact your current carrier to find out whether your coverage is affected by the reclassification. Don’t wait for your renewal date — some carriers review policies mid-term when a property’s designation changes. Under California’s Safer from Wildfires regulation (Insurance Code 2644.9), you have the legal right to request your wildfire risk score from your insurer at any time. Ask for it in writing. This conversation is easier to have now — before a non-renewal notice — than after one arrives.
Document your current property condition
Take dated photos of your property’s current condition — all zones, all structures, access routes. This baseline documentation has value in three ways: it establishes your starting point before any compliance work, it supports future insurance conversations, and it creates a record if there’s ever a dispute about when improvements were made. Undocumented work has no value in insurance or compliance disputes.
Address compliance gaps before an inspector arrives
Newly designated properties are often prioritized for inspection in the years following a map update. Getting into compliance proactively — before a notice arrives — is significantly less stressful than responding to an inspection under a 30-day deadline. Start with Zone 0, move to Zone 1, then Zone 2. If the scope is beyond what you can do yourself, professional crews familiar with the zone requirements can execute and document the work.
If you’re selling, understand the new disclosure requirements
A new FHSZ designation triggers disclosure obligations at point of sale under AB 38 and Civil Code 1102.19. Sellers in High or Very High FHSZ areas must provide a home hardening checklist and defensible space compliance documentation. If you’re planning to sell, factor this into your timeline — getting compliant before listing is cleaner than trying to resolve it during escrow.
Investigate AB 888 grant eligibility for Zone 0 compliance
AB 888 — the California Safe Homes Act, effective January 1, 2026 — established a grant program through the California Department of Insurance to help qualifying homeowners pay for fire-safe roof replacement and Zone 0 noncombustible zone creation. If you’re on the California FAIR Plan or in a lower-income bracket, this is worth investigating immediately. Contact the California Department of Insurance at 800-927-4357 or insurance.ca.gov.
Key things to know
Plan for Zone 0 — it applies to your property now or soon. California AB 3074 (2020) established Zone 0 as a statewide standard, and Governor Newsom’s Executive Order N-18-25 (February 2025) directed the Board of Forestry to finalize regulations by December 31, 2025. February 2027 is the planning deadline homeowners should work toward for existing structures. In San Diego County, Zone 0 is already locally codified under Ordinance 10927 Section 4907.9.1 — it is a current local requirement. Verify current statewide enforcement dates with CAL FIRE or your local agency.
Your neighbor’s fuel load affects your risk. CAL FIRE’s fire behavior modeling accounts for the landscape around your parcel, not just vegetation on your lot. Properties at the top of south-facing drainage chutes, adjacent to unmanaged chaparral on neighboring parcels, or downwind of ridge systems in Santa Ana wind corridors face disproportionate ember exposure. A professional risk assessment evaluates your property’s specific terrain position, aspect, and off-parcel fuel load — factors a map designation alone cannot capture.
The insurance situation for newly designated properties. The 2025 FHSZ map expansion created a wave of newly designated properties across San Diego County — and the insurance market responded. If your property moved from undesignated to Very High, you are in the same market position as properties that have carried those designations for years. The most important thing you can do right now is get documented mitigation work on record. Under Insurance Code 2644.9, you have the right to request your wildfire risk score and dispute it if your mitigation work isn’t reflected. Documentation — professional assessments, dated photos, completion records — is what makes that dispute viable.
Cal Wildfire Defense
Understand exactly what your new designation requires — and document where you stand.
A CWD Wildfire Risk Assessment gives you a written, firefighter-standard evaluation of your property against your new FHSZ designation — every zone, every gap, every deficiency documented. Most customers use it to understand their compliance position, prepare before an inspector arrives, and produce documentation that supports insurance conversations. From $549, with free property walks available in-area.
This page provides educational context, not legal or insurance advice. FHSZ designations, compliance requirements, and enforcement timelines may change. Always verify your current designation and requirements directly with CAL FIRE or your local fire agency before acting. Last reviewed April 2026.