Wildfire Zones: Ontario vs Victorville
How do wildfire zones rules compare between Ontario, CA and Victorville, CA?
Ontario has fewer restrictions than Victorville.
Ontario, CA
San Bernardino County
Ontario sits on the valley floor and is not mapped in a CAL FIRE Very High Fire Hazard Severity Zone. Chapter 7A ignition-resistant construction and PRC 4291 defensible space do not apply citywide.
View full Ontario rules →Victorville, CA
San Bernardino County
Parts of Victorville fall within or near CAL FIRE Very High Fire Hazard Severity Zones, especially along foothill and desert-wildland interface areas. CBC Chapter 7A and PRC 4291 apply to zoned parcels.
View full Victorville rules →Key Facts Comparison
| Fact | Ontario | Victorville |
|---|---|---|
| CAL FIRE status | Not in VHFHSZ | VHFHSZ on foothill and WUI fringe |
| Chapter 7A | Not required citywide | Required in mapped zones |
| PRC 4291 | Defensible space rule not triggered | 100-foot defensible space |
| Still required | Weed abatement and Fire Code | - |
| Map check | CAL FIRE FHSZ viewer | CAL FIRE FHSZ viewer |
| AB 38 | - | Sale disclosure for pre-2010 homes |
Highlighted rows indicate differences between cities.
Ontario FAQ
Is my Ontario home in a wildfire zone?
Almost certainly no. Ontario is on the valley floor with no designated Very High Fire Hazard Severity Zones, but always verify on the CAL FIRE viewer for your specific parcel.
Do I need Chapter 7A ignition-resistant siding in Ontario?
Not based on wildfire zoning, since Ontario has no VHFHSZ. Standard California Building Code materials are allowed.
Victorville FAQ
Is my Victorville home in a wildfire zone?
Many Victorville parcels are on the desert floor outside VHFHSZ, but foothill and wildland-interface neighborhoods are mapped. Always verify on the CAL FIRE FHSZ viewer for your specific address.
Do I need Chapter 7A ignition-resistant siding in Victorville?
Only if your parcel is mapped in a Very High Fire Hazard Severity Zone. New construction and major rebuilds in those zones must use Class A roofing, ember-resistant vents, and approved exterior materials.
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