Brush Clearance: Castro Valley vs Fremont
How do brush clearance rules compare between Castro Valley, CA and Fremont, CA?
Castro Valley and Fremont have similar restriction levels.
Castro Valley, CA
Alameda County
Public Resources Code 4291 requires 100 feet of defensible space around all structures in VHFHSZ and SRA areas of Alameda County, enforced by CAL FIRE and the Alameda County Fire Department.
View full Castro Valley rules →Fremont, CA
Alameda County
Fremont east foothill properties must maintain 100 feet of defensible space per PRC 4291. The Fire Department conducts annual inspections in Mission Peak, Weibel, and Niles foothill zones.
View full Fremont rules →Key Facts Comparison
| Fact | Castro Valley | Fremont |
|---|---|---|
| Legal basis | PRC 4291 | - |
| Defensible space | 100 feet | - |
| Zone 0 | 0-5 feet ember-resistant | 0 to 5 ft ember-resistant |
| Zone 1 | 5-30 feet lean clean green | 0 to 30 ft lean, clean, green |
| Grass height | 4 inches max in Zone 2 | - |
| Defensible Space | - | 100 feet (PRC 4291) |
| Grass Height | - | 4 inches max |
| Inspections | - | Annual starting April |
Highlighted rows indicate differences between cities.
Castro Valley FAQ
When do inspections occur?
The Alameda County Fire Department and CAL FIRE typically inspect from May through October, with peak focus in June and July before peak fire season.
What happens if I fail inspection?
You receive a notice to correct with a deadline; failure to correct results in fines and county abatement where contractors perform the work and bill the property owner.
Fremont FAQ
Do flatland Fremont homes need defensible space?
PRC 4291 technically applies statewide, but enforcement focuses on VHFHSZ east foothill neighborhoods. Flatland homes in Centerville, Irvington, and Warm Springs face general weed abatement rules rather than full 100-foot clearance.
What happens if I miss the deadline?
The Fremont Fire Department will hire a contractor to clear the property and bill you. Unpaid bills become a lien on your parcel through Alameda County, typically with administrative fees of several hundred dollars on top.
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