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San Diego County Wildfire Evidence: Fire Zones, Defensible Space and Insurance

Wildfire questions in San Diego County are not limited to the backcountry. Fire hazard maps reach into many cities as well as the unincorporated area, and the zone a parcel falls in can affect sale documentation, insurance availability and what an owner must maintain around the house. This guide sorts the evidence a buyer or seller can collect, from the state map to the inspection record and written insurance quotes, and explains what each piece does and does not show.

Fire hazard severity zones: SRA and LRA

The Office of the State Fire Marshal classifies land into Moderate, High and Very High Fire Hazard Severity Zones. For State Responsibility Areas, the Fire Marshal’s updated maps took effect in April 2024. For Local Responsibility Areas, the Fire Marshal released recommended maps to local jurisdictions in phases between February and March 2025, and local agencies are the contact for a specific property’s status.

The Fire Marshal stresses that these maps describe hazard, meaning physical conditions such as vegetation, slope, fire history and weather over a long period, and not risk. Hazard mapping does not account for home hardening or fuel reduction on a specific lot. A zone class is therefore a starting point for questions, not a measure of how a particular home would fare.

Defensible space and the AB 38 sale requirement

California’s AB 38 created Civil Code section 1102.19. According to the Fire Marshal’s Information Bulletin 21-007, since July 1, 2021 a seller of property in a High or Very High Fire Hazard Severity Zone, in either the SRA or LRA, must give the buyer documentation that the property complies with defensible space requirements. An inspection completed within six months before the sale can be used. If the seller cannot obtain documentation before closing, the buyer and seller sign a written agreement for the buyer to obtain it within one year after close of escrow.

Which agency inspects depends on location. The bulletin explains that a local agency handles inspections in Very High zones in the LRA and in SRA zones where the local jurisdiction has its own vegetation ordinance; CAL FIRE handles SRA zones without such an ordinance. In San Diego County, a city fire department, a fire protection district or County Fire, which serves only unincorporated areas, may be the right contact. One local district, San Miguel Fire & Rescue, describes its own request process and fee, which illustrates that procedures differ by agency. See our AB 38 defensible space inspection guide.

For unincorporated parcels, the County’s defensible space page describes three zones: hardscape and no combustibles within 5 feet of buildings, low fire-resistant irrigated planting from 5 to 50 feet, and thinned, trimmed vegetation from 50 to 100 feet. It refers to the County’s Wildland-Urban Interface Code and notes that fire districts can add their own rules.

Insurance: quotes are the evidence

Fire zone status and site conditions can shape whether insurers will write a policy and at what price. The California Department of Insurance’s tips for finding residential insurance recommend shopping early, using its premium and coverage comparison tools and its agent and broker finder, and asking about surplus lines carriers if needed. It describes the California FAIR Plan as a last-resort option that covers a limited set of perils, typically supplemented by a difference-in-conditions policy.

A map does not tell a buyer what coverage they can get. Written quotes for the specific address do, so request them during the inspection period, not after removing contingencies. See homeowners insurance during escrow and the FAIR Plan guide for homebuyers.

Access and evacuation

Road access, driveway length and the number of routes out of a neighborhood matter to owners and to fire agencies, and they are worth observing in person. Regional alert tools also help. National City’s fire department page on Alert San Diego explains that the system sends emergency notifications, including evacuation instructions, to registered cell phones and email addresses, and that the Genasys Protect app lets residents follow evacuation zones for their addresses. A buyer can look up the zone for a property before moving in. Private road maintenance and access agreements are covered in the rural guides for the unincorporated county.

Wildfire evidence audit grid

Evidence Where to get it What it establishes What it does not establish Next step
FHSZ class, SRA or LRA State Fire Marshal FHSZ maps; city or County for LRA status The mapped hazard class and responsibility area Risk to the specific home Confirm with the local agency if near a zone line
Natural hazard disclosure NHD report in escrow Which mapped zones the parcel falls in Site conditions or compliance Compare with the state map
Defensible space documentation Seller, from the inspecting agency (Bulletin 21-007) Compliance at the inspection date Ongoing compliance or home hardening If none, sign the one-year agreement and schedule the inspection
Local vegetation rules County defensible space page or the city or fire district What the owner must maintain Insurer requirements Budget for ongoing clearance
Insurance quotes Agents, brokers and CDI tools Coverage available now and its price Renewal terms in later years Obtain more than one quote before contingency removal
Evacuation zone Genasys Protect and Alert San Diego The zone used for alerts Travel time or road capacity Drive the routes; register for alerts

Presenting fire evidence as a seller

Sellers in a High or Very High zone can shorten escrow questions by ordering the defensible space inspection early, keeping receipts for clearance and hardening work, and gathering any insurer inspection reports. Buyers will still obtain their own quotes, but an organized file shows what has been done and when.

Official sources checked October 31, 2026: State Fire Marshal Fire Hazard Severity Zones; OSFM Information Bulletin 21-007 on AB 38; County of San Diego defensible space; County Fire; San Miguel Fire & Rescue AB 38 inspections; California Department of Insurance residential insurance tips; National City Fire, Alert San Diego. This guide organizes evidence for a property decision; it is not legal, tax, insurance or engineering advice, an appraisal or a determination for a particular parcel.

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