Wildfire Zones: Santa Clara vs Sunnyvale
How do wildfire zones rules compare between Santa Clara, CA and Sunnyvale, CA?
Sunnyvale has fewer restrictions than Santa Clara.
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 →Sunnyvale, CA
Santa Clara County
Sunnyvale is not located in any Cal Fire Very High Fire Hazard Severity Zone. The city sits on the flat Santa Clara Valley floor without wildland-urban interface areas requiring special fire hardening.
View full Sunnyvale rules →Key Facts Comparison
| Fact | Santa Clara | Sunnyvale |
|---|---|---|
| City core zone | Not mapped VHFHSZ | - |
| Nearby foothills | Moderate to Very High | - |
| Chapter 7A | Ignition-resistant materials in VHFHSZ | - |
| Defensible space | 100 ft PRC 4291 where applicable | - |
| Map authority | CAL FIRE Office of State Fire Marshal | - |
| VHFHSZ designation | - | None |
| State Responsibility Area | - | No |
| Geography | - | Flat valley floor |
| Chapter 7A required | - | No |
| Weed abatement applies | - | Yes |
Highlighted rows indicate differences between cities.
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.
Sunnyvale FAQ
Do I need fire-resistant roofing in Sunnyvale?
Class A roofing is required by the California Building Code statewide, but Chapter 7A hardening for WUI zones does not apply here.
Does my insurance consider Sunnyvale a wildfire risk?
Sunnyvale is a low-risk zone, but insurers may still raise rates based on statewide exposure trends.
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