Brush Clearance: Costa Mesa vs Irvine
How do brush clearance rules compare between Costa Mesa, CA and Irvine, CA?
Costa Mesa and Irvine have similar restriction levels.
Costa Mesa, CA
Orange County
Costa Mesa requires property owners to remove weeds, grass, and combustible vegetation capable of endangering property. The Costa Mesa Fire Department enforces vegetation management standards as part of the adopted fire code.
View full Costa Mesa rules →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 →Key Facts Comparison
| Fact | Costa Mesa | Irvine |
|---|---|---|
| Requirement | Remove combustible vegetation | - |
| Enforcement | Costa Mesa Fire Department | OCFA |
| Open Burning | Prohibited (SCAQMD Rule 444) | - |
| Non-Compliance | City may abate at owner's cost | - |
| Defensible Space | - | 100 ft in FHSZ areas |
| Zone 1 | - | 0-30 ft: remove dead vegetation |
| Zone 2 | - | 30-100 ft: reduce density |
| FHSZ Map Updated | - | 2025 (expanded areas) |
Highlighted rows indicate differences between cities.
Costa Mesa FAQ
What are the brush clearance requirements in Costa Mesa?
Property owners must remove weeds, grass, and other vegetation capable of being ignited and endangering property under the adopted fire code.
Can I burn cleared vegetation?
No. Open burning is prohibited in the South Coast Air Basin under SCAQMD Rule 444. Use proper yard waste disposal.
Who enforces brush clearance?
The Costa Mesa Fire Department enforces vegetation management standards. Code Enforcement also addresses overgrown properties.
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.
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