Brush Clearance: Irvine vs Mission Viejo
How do brush clearance rules compare between Irvine, CA and Mission Viejo, CA?
Irvine has fewer restrictions than Mission Viejo.
Irvine, CA
Orange County
Irvine enforces vegetation management under IMC Title 4, Division 4 (Fire) and the California Fire Code. Properties in Fire Hazard Severity Zones must maintain 100 feet of defensible space per California PRC Section 4291.
View full Irvine rules →Mission Viejo, CA
Orange County
Mission Viejo requires 100 feet of defensible space around structures in fire hazard areas, enforced by OCFA. Annual brush clearance inspections occur in spring, and non-compliance results in abatement at the property owner's expense.
View full Mission Viejo rules →Key Facts Comparison
| Fact | Irvine | Mission Viejo |
|---|---|---|
| Defensible Space | 100 ft in FHSZ areas | 100 feet from structures |
| Zone 1 | 0-30 ft: remove dead vegetation | 0-30 ft — remove all dead vegetation |
| Zone 2 | 30-100 ft: reduce density | 30-100 ft — reduce to 18 inches |
| FHSZ Map Updated | 2025 (expanded areas) | - |
| Enforcement | OCFA | - |
| Inspections | - | Annual, starting in April |
| OCFA | - | (714) 573-6000 |
Highlighted rows indicate differences between cities.
Irvine FAQ
Is my Irvine property in a fire hazard zone?
Irvine updated its FHSZ maps in 2025. Check the city's Fire Hazard Severity Zone Map to see if your property is in a Moderate, High, or Very High zone.
How much brush clearance is required?
Properties in FHSZ areas must maintain 100 feet of defensible space, with stricter requirements in the first 30 feet from structures.
Mission Viejo FAQ
How much brush clearance is required in Mission Viejo?
Properties in or adjacent to wildland areas must maintain 100 feet of defensible space. Zone 1 (0-30 feet) requires removal of all dead vegetation. Zone 2 (30-100 feet) requires reduction to 18 inches.
When are brush clearance inspections in Mission Viejo?
OCFA conducts annual inspections typically beginning in April. Property owners receive notices with specific requirements and compliance deadlines.
What happens if I don't clear brush in Mission Viejo?
OCFA will perform the abatement and bill you, typically $500-$2,000+. If non-compliance contributes to fire spread, criminal liability may apply.
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