Brush Clearance: Altadena vs Norwalk
How do brush clearance rules compare between Altadena, CA and Norwalk, CA?
Norwalk has fewer restrictions than Altadena.
Altadena, CA
Los Angeles County
Altadena is largely in a Very High Fire Hazard Severity Zone. LA County Fire requires year-round brush clearance within 200 feet of any structure and 10 feet of combustible fences and roadways.
View full Altadena rules →Norwalk, CA
Los Angeles County
California PRC §4291 requires 100-foot defensible space in fire hazard zones. Norwalk may impose additional clearance requirements.
View full Norwalk rules →Key Facts Comparison
| Fact | Altadena | Norwalk |
|---|---|---|
| Defensible Space | 200 ft around structures | - |
| Fence/Driveway Clearance | 10 ft | - |
| Grass Height | ≤ 3 inches | - |
| Tree Limb Up | ≥ 6 ft above ground | - |
| Authority | LA County Fire Code Title 32 + PRC 4291 | - |
| Zone 1 | - | 0 to 30 ft: lean, clean, green |
| Zone 2 | - | 30 to 100 ft: reduced fuel |
| State Law | - | CA PRC §4291 |
| Inspections | - | Annual |
Highlighted rows indicate differences between cities.
Altadena FAQ
How much brush clearance is required in Altadena?
200 feet of defensible space around any structure if you are in a Very High Fire Hazard Severity Zone, per LA County Fire and California PRC 4291.
Norwalk FAQ
How much clearance do I need?
100 feet of defensible space if in a fire hazard zone. Two zones with different requirements.
Who inspects?
Norwalk fire department or CAL FIRE conducts annual inspections in fire hazard areas.
Compare other topics
See how Altadena and Norwalk compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool