Wildfire Zones: Fullerton vs Irvine
How do wildfire zones rules compare between Fullerton, CA and Irvine, CA?
Fullerton and Irvine have similar restriction levels.
Fullerton, CA
Orange County
Portions of Fullerton in the northern hills near the Puente Hills and West Coyote Hills are designated as Very High Fire Hazard Severity Zones (VHFHSZ) by CAL FIRE. Properties in these zones face additional building and landscaping requirements.
View full Fullerton rules →Irvine, CA
Orange County
Irvine adopted updated Fire Hazard Severity Zone maps in 2025, expanding Moderate, High, and Very High designations into multiple communities. Properties in FHSZ areas face enhanced building standards and defensible space requirements.
View full Irvine rules →Key Facts Comparison
| Fact | Fullerton | Irvine |
|---|---|---|
| Fire Zones | Northern hills — VHFHSZ designated | - |
| Defensible Space | 100 ft clearance required (PRC §4291) | 100 ft required in FHSZ |
| Building Code | CBC Chapter 7A ignition-resistant | CBC Chapter 7A in VHFHSZ |
| Inspections | Annual by Fullerton Fire Dept. | - |
| Contact | Fullerton Fire — (714) 738-6500 | - |
| FHSZ Map | - | Updated 2025, effective July 2025 |
| Zones | - | Moderate, High, Very High |
| Expanded Areas | - | 8+ communities added |
Highlighted rows indicate differences between cities.
Fullerton FAQ
Is my Fullerton property in a wildfire zone?
Properties in northern Fullerton near the West Coyote Hills and Puente Hills may be in a Very High Fire Hazard Severity Zone. Check the CAL FIRE FHSZ map or contact the Fullerton Fire Department at (714) 738-6500.
What is defensible space in Fullerton?
Properties in fire hazard zones must maintain 100 feet of defensible space around structures per California PRC Section 4291, including removing dead vegetation and maintaining fire-resistant landscaping.
Do fire zone properties need special building materials?
Yes. Properties in VHFHSZ areas must comply with CBC Chapter 7A for ignition-resistant construction including fire-rated roofing, walls, and ember-resistant vents.
Irvine FAQ
Is my Irvine home in a wildfire zone?
Check the city's Fire Hazard Severity Zone Map. The 2025 update expanded zones into Orchard Hills, Woodbury, Portola Springs, Quail Hill, Turtle Rock, and other communities.
What building requirements apply in fire zones?
Properties in Very High FHSZ must meet CBC Chapter 7A standards for ignition-resistant construction, including Class A roofing and fire-resistant walls.
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