Wildfire Zones: Hesperia vs Rancho Cucamonga
How do wildfire zones rules compare between Hesperia, CA and Rancho Cucamonga, CA?
Hesperia and Rancho Cucamonga have similar restriction levels.
Hesperia, CA
San Bernardino County
Updated CAL FIRE/OSFM Fire Hazard Severity Zone maps significantly expanded Very High Fire Hazard Severity Zones (VHFHSZ) in Hesperia effective July 22, 2025. Properties in VHFHSZ must comply with Chapter 7A of the California Building Code (WUI ignition-resistant construction) and PRC §4291 defensible space.
View full Hesperia rules →Rancho Cucamonga, CA
San Bernardino County
Much of northern Rancho Cucamonga lies in the Very High Fire Hazard Severity Zone. VHFHSZ properties face stricter defensible space, Class A roofing, and Chapter 7A ignition-resistant construction rules.
View full Rancho Cucamonga rules →Key Facts Comparison
| Fact | Hesperia | Rancho Cucamonga |
|---|---|---|
| Zone Designation | Expanded VHFHSZ effective July 22, 2025 | - |
| Authority | CAL FIRE/OSFM + SB County Fire (LRA) | - |
| Building Standard | CBC Chapter 7A (WUI construction) | - |
| Defensible Space | 100 ft per PRC §4291 | - |
| Zone 0 | 0–5 ft ember-resistant (AB 3074) | - |
| Disclosure | AB 38 buyer disclosure required in VHFHSZ | - |
| VHFHSZ coverage | - | Northside foothills above Banyan, Etiwanda north of Highland |
| Chapter 7A construction | - | Required for new builds and major remodels in VHFHSZ |
| Defensible space | - | 100 feet under PRC 4291, Zone 0 under AB 3074 |
| Evacuation alerts | - | Sign up for Alert SBC and City Watch Rancho Cucamonga |
| Insurance note | - | Natural Hazard Disclosure required on real estate sales |
Highlighted rows indicate differences between cities.
Hesperia FAQ
Is my Hesperia property in a wildfire zone?
Possibly. Updated VHFHSZ maps took effect July 22, 2025 and expanded coverage significantly. Check the CAL FIRE OSFM FHSZ viewer or City of Hesperia Building & Safety, and review Hesperia Information Bulletin IB-25-002.
What construction standards apply in VHFHSZ?
California Building Code Chapter 7A: ignition-resistant exterior walls, Class A roof, dual-pane tempered glass windows, ember-resistant vents (1/16–1/8 in mesh), protected eaves, and non-combustible decking near structures.
Do I have to disclose VHFHSZ when selling?
Yes. AB 38 (2019) requires sellers to disclose VHFHSZ designation to buyers and, for homes built before 2010, provide a home-hardening disclosure as part of the Natural Hazard Disclosure Statement.
What is Zone 0?
Zone 0 is the 0–5 ft ember-resistant zone immediately around a structure, mandated by AB 3074 (2020) and regulated by the California Board of Forestry. Combustible materials (wood mulch, fences attached to the home, stored items) must be removed.
Rancho Cucamonga FAQ
How do I find out if my Rancho Cucamonga home is in a wildfire zone?
Use the CAL FIRE Fire Hazard Severity Zone viewer by address. RCFPD can also confirm your zone and provide a hazard reduction checklist.
Do I have to retrofit my older Etiwanda home to Chapter 7A standards?
No, only new construction and substantial remodels trigger Chapter 7A. However, defensible space and AB 3074 Zone 0 rules apply to existing homes.
What are the evacuation routes from the foothills?
Primary routes are Day Creek Boulevard and Milliken Avenue southbound. Alternates include Etiwanda Avenue and Haven Avenue, with staging areas at Victoria Gardens and Central Park.
Compare other topics
See how Hesperia and Rancho Cucamonga 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