Wildfire Zones: Fullerton vs Mission Viejo
How do wildfire zones rules compare between Fullerton, CA and Mission Viejo, CA?
Fullerton has fewer restrictions than Mission Viejo.
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 →Mission Viejo, CA
Orange County
Portions of Mission Viejo along the eastern and southern hillside edges are designated as Very High Fire Hazard Severity Zones by CAL FIRE and OCFA. Properties in these zones must maintain 100 feet of defensible space, use fire-resistant building materials, and comply with OCFA vegetation management inspection programs. Annual brush clearance is required before fire season.
View full Mission Viejo rules →Key Facts Comparison
| Fact | Fullerton | Mission Viejo |
|---|---|---|
| Fire Zones | Northern hills — VHFHSZ designated | - |
| Defensible Space | 100 ft clearance required (PRC §4291) | 100 feet required from structures |
| Building Code | CBC Chapter 7A ignition-resistant | - |
| Inspections | Annual by Fullerton Fire Dept. | Annual OCFA vegetation management checks |
| Contact | Fullerton Fire — (714) 738-6500 | - |
| Zone 1 Clearance | - | 0–30 feet, remove all combustibles |
| Building Materials | - | Class A roof, fire-resistant per CBC Ch. 7A |
| Inspection Period | - | April through June annually |
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.
Mission Viejo FAQ
Is my Mission Viejo property in a wildfire hazard zone?
Properties along the eastern hillsides near Trabuco Canyon and areas near Oso Parkway may be in a Very High Fire Hazard Severity Zone. Check the CAL FIRE hazard severity zone map or contact OCFA Community Risk Reduction at (714) 573-6000 for your specific address.
What does defensible space clearance require?
Within 30 feet of your home, remove all dead vegetation, dry leaves, and combustible materials. From 30 to 100 feet, reduce and space vegetation to slow fire spread. Trees should be limbed up 6 feet from the ground and spaced so canopies do not touch.
When does OCFA inspect for brush clearance?
OCFA typically conducts vegetation management inspections from April through June. Property owners in designated zones receive written notices with a compliance deadline. Contact OCFA at (714) 573-6000 if you have questions about your inspection schedule.
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