Wildfire Zones: Palo Alto vs Santa Clara
How do wildfire zones rules compare between Palo Alto, CA and Santa Clara, CA?
Santa Clara has fewer restrictions than Palo Alto.
Palo Alto, CA
Santa Clara County
Western foothill neighborhoods in Palo Alto sit in the CAL FIRE Very High Fire Hazard Severity Zone. Properties there face defensible space, ember-resistant construction, and inspection requirements under California law.
View full Palo Alto rules →Santa Clara, CA
Santa Clara County
Santa Clara is largely not mapped in a Very High Fire Hazard Severity Zone, but adjacent foothill communities are. Check the CAL FIRE map before building or landscaping near open space.
View full Santa Clara rules →Key Facts Comparison
| Fact | Palo Alto | Santa Clara |
|---|---|---|
| VHFHSZ area | Foothills west of I-280 | - |
| Defensible space | 100 feet required | 100 ft PRC 4291 where applicable |
| New construction | Chapter 7A WUI standards | - |
| Evacuation routes | Page Mill, Arastradero | - |
| Mapping agency | CAL FIRE | - |
| City core zone | - | Not mapped VHFHSZ |
| Nearby foothills | - | Moderate to Very High |
| Chapter 7A | - | Ignition-resistant materials in VHFHSZ |
| Map authority | - | CAL FIRE Office of State Fire Marshal |
Highlighted rows indicate differences between cities.
Palo Alto FAQ
How do I check if my home is in VHFHSZ?
Use the CAL FIRE FHSZ Viewer online or call Palo Alto Fire Prevention. Address-level searches show the designation.
Does VHFHSZ affect my insurance?
Yes. Many carriers non-renew or raise premiums in VHFHSZ areas. The California FAIR Plan is the insurer of last resort.
Santa Clara FAQ
Do I need fire-resistant siding in Santa Clara?
Only if your parcel is in or near a Very High Fire Hazard Severity Zone. Most valley-floor Santa Clara homes are exempt from Chapter 7A.
How do I check my fire zone?
Use the CAL FIRE Fire Hazard Severity Zone viewer and enter your address to see the official designation.
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