Is my home in a very high fire hazard zone under the 2025 maps?
Check your address with ADUCheck's fire check or CAL FIRE's map viewer. CAL FIRE issued new recommended maps for local responsibility areas on March 24, 2025, and cities and counties had to adopt them by ordinance within 120 days of publication. The zone decides your brush clearance distance, whether Zone 0 rules will apply, and what you must disclose when you sell.
Check your address
The hazard zone, the department that inspects, past fires nearby and every rule that applies to your home.
Who adopted the 2025 maps
- Unincorporated Orange County
- Adopted by the Board of Supervisors through Ordinance No. 25-015 on August 26, 2025.
- Mission Viejo
- Adopted May 27, 2025.
- Your city
- Each city adopts its own map. The fire check reads the current state and county layers for your address and says which map it used.
What the zone changes for you
- Brush clearance
- Your fire department's distance and inspection apply. See brush clearance.
- Zone 0
- Once in effect, the state's ember-resistant zone rules cover very high zones in local areas and all state responsibility areas.
- Building
- New homes and ADUs in these zones follow the Wildland-Urban Interface Code: Class A roof, ember-resistant vents and tempered glass.
- Selling
- Sellers in high and very high zones must give buyers proof of defensible space compliance.
Sources
- LAFD, 2025 CAL FIRE fire hazard severity zones map recommendation, read November 9, 2026
- City of Mission Viejo, fire hazard severity zone maps, read November 9, 2026
- OC Public Works, Orange County fire hazard severity zones map, read November 9, 2026
- CAL FIRE Fire Hazard Severity Zone viewer, read November 9, 2026
General information, not legal advice. Your fire department and city have the final word for your property.
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