Fire hazard severity zones in Orange County
Updated . By the OakTend team.
For Orange County homeowners. General information, not legal or insurance advice; your city and fire department have the final word.
What is a fire hazard severity zone?
An area the State Fire Marshal rates as moderate, high or very high fire hazard. Under Government Code section 51178 the rating rests on fuel, slope, fire weather and other factors, including places where wind is a major cause of fire spread.
It rates the land, not your house. Laguna Niguel's page puts it this way: hazard is the chance of fire over 30 to 50 years without counting anything people do about it, while risk counts things like home hardening and fuel reduction. The same page quotes the California Department of Insurance: the maps are intended to drive local planning decisions, not insurance decisions.
What changed with the 2025 maps?
On March 24, 2025, CAL FIRE sent updated maps for the areas that cities and the County protect themselves. Laguna Niguel, Lake Forest and the County all date their new map to that day. State law then gives each one 120 days to adopt zones by ordinance. A city or the County can add areas or raise a level, but it cannot lower one the state set.
For unincorporated areas the Board of Supervisors adopted the map by Ordinance No. 25-015 on August 26, 2025. Laguna Niguel adopted its map on June 3, 2025, and Lake Forest posts its 2025 map next to the 2007 one, which is an easy way to see what moved.
How do I find out if my house is in one?
- CAL FIRE's map viewer. The County links to the state's Fire Hazard Severity Zone Viewer, where you enter an address.
- OCFA's map. The Orange County Fire Authority's defensible space disclosure page has an address map. Its pink areas are where OCFA does the seller inspections described below.
- Your city. Laguna Niguel has an address lookup, and the County posts the unincorporated map and the ordinance. Elsewhere, ask your city's planning or building department.
The maps do not always agree. OCFA notes that a Natural Hazard Disclosure report may show a fire zone where OCFA's map does not, because the report company may use a map that includes lower severity zones.
What does being in a zone mean for my house?
- Building. The County says buildings in a very high zone are built with the fire-resistive features in the California Building Code, and Laguna Niguel points new buildings in its zones to Chapter 7A. Before an addition or a big remodel, ask your building department which rules apply.
- Yard and house. Defensible space, the 5-foot ember-resistant zone (Zone 0) and ember-resistant vents are in our wildfire prep guide. Whether Zone 0 is required yet is answered there too.
What do I have to do when I sell?
Two things. Under Government Code section 51183.5, the seller of a home in a very high zone has to disclose that, on the Natural Hazard Disclosure Statement or a local option disclosure form. And OCFA explains that Civil Code section 1102.19 requires the seller of a home in a high or very high zone to give the buyer documentation that the property complies with defensible space rules, or a written agreement that the buyer will get it within one year of closing.
OCFA's answers about its inspection:
- It is free and covers the outside of the property only.
- The owner or the selling agent requests it, when the home is listed. Someone 18 or older with a right to be there has to walk it with the inspector.
- If the property passes, a compliance form is emailed within 1 to 3 business days. If not, the inspector leaves a handwritten notice of the work needed.
- The compliance documentation is good for 6 months.
OCFA serves 23 cities and all unincorporated areas. Anaheim, Brea, Costa Mesa, Fullerton, Fountain Valley, Huntington Beach, Laguna Beach, La Habra (through Los Angeles County), Newport Beach, Orange and Placentia run their own inspections, so start with the city there.
City pages: Laguna Niguel, Lake Forest, Mission Viejo, San Juan Capistrano, Brea and Villa Park, or every city on the Orange County hub.
As of October 3, 2026. Maps and rules change; check the current map and your fire department before you rely on any of this.
Sources
- California Government Code section 51178
The State Fire Marshal identifies moderate, high and very high fire hazard severity zones based on fuel loading, slope, fire weather and other factors, including areas where wind is a major cause of wildfire spread. - California Government Code section 51179
A local agency adopts zones by ordinance within 120 days of the State Fire Marshal's recommendations, may add areas or raise a level, and may not lower a level the state set. - County of Orange Public Works: Orange County Fire Hazard Severity Zones map
CAL FIRE released the updated unincorporated map on March 24, 2025; the Board of Supervisors adopted it by Ordinance No. 25-015 on August 26, 2025; buildings in very high zones use the building code's fire-resistive features; the link to CAL FIRE's Fire Hazard Severity Zone Viewer. - City of Laguna Niguel: Fire Hazard Severity Zones
The March 24, 2025 release and the city's June 3, 2025 adoption, hazard versus risk, the Department of Insurance's statement that the maps are for local planning and not insurance decisions, Chapter 7A for new buildings, and the address lookup. - City of Lake Forest: Fire Hazard Severity Zone maps
CAL FIRE transmitted the new local responsibility area maps on March 24, 2025, and the city posts its 2025 and 2007 maps. - Orange County Fire Authority: defensible space disclosure
Civil Code 1102.19's seller documentation requirement in high and very high zones, the one-year agreement, the 11 cities that run their own inspections, and the address map. - Orange County Fire Authority: defensible space disclosure FAQ
The inspection is free and exterior only, requested by the owner or selling agent when the home is listed, needs someone 18 or older present, results in an emailed form within 1 to 3 business days or a handwritten notice, documentation is valid 6 months, and an NHD report may use a map with lower severity zones. - Orange County Fire Authority: member cities
OCFA serves 23 cities and all unincorporated areas. - California Government Code section 51183.5
The seller of a home in a very high fire hazard severity zone must disclose it, on the Natural Hazard Disclosure Statement or the local option disclosure statement.