Rancho Cucamonga, CA Fire Regulations: Wildfire Zones (2026)

Rancho Cucamonga contains substantial acreage mapped by CAL FIRE as Very High Fire Hazard Severity Zone (VHFHSZ), covering the northside foothills above Banyan Street, Etiwanda north of Highland Avenue, the Day Creek and East Avenue corridor near the national forest, and neighborhoods along Haven Avenue north of Hillside Road. VHFHSZ designation triggers PRC 4291 100-foot defensible space, California Building Code Chapter 7A ignition-resistant construction (ember-resistant vents, Class A roofing, tempered dual-pane windows, non-combustible siding options) on new construction and substantial remodels, and AB 3074 Zone 0 ember-free requirements within 5 feet of structures. Homes in the VHFHSZ are subject to the Natural Hazard Disclosure required on real estate transactions and face higher California FAIR Plan insurance exposure as private insurers pull back. Rancho Cucamonga maintains a Community Wildfire Protection Plan with evacuation routes from Etiwanda via Day Creek Boulevard and Milliken Avenue. The Fire District runs a Ready Set Go outreach program each spring, and residents can sign up for alerts through SB County Sheriff Alert SBC and City Watch Rancho Cucamonga. Hillside properties also trigger the citys Hillside Development Ordinance limiting grading and lot coverage.