Vacaville, CA Fire Regulations: Wildfire Zones (2026)

Vacaville sits at the edge of the Coast Range / Vaca Mountains, and the 2020 LNU Lightning Complex (~363,000 acres) burned along the western and southern edges of the city — driving the State's expanded LRA mapping. On February 24, 2025 the Office of the State Fire Marshal released updated Local Responsibility Area Fire Hazard Severity Zone maps for cities including Vacaville. Under Government Code §51179, the City was required to designate the zones by local ordinance within 120 days of receiving the OSFM recommendation. The map newly classifies parts of Lagoon Valley, Browns Valley, the eastern Vaca Hills, and rural portions of Pleasants Valley Road as Moderate, High, or Very High FHSZ. State Responsibility Area parcels at the western edge of Vacaville remain under CAL FIRE LNU jurisdiction. Designation triggers: (1) 100-ft defensible space (Govt Code §51182 LRA, PRC §4291 SRA); (2) California Building Code Chapter 7A wildland-urban-interface construction standards on new construction and substantial remodels in Very High zones — ignition-resistant siding, Class A roof, ember-resistant vents, dual-pane tempered windows, decking, and noncombustible Zone 0; (3) Natural Hazard Disclosure under California Civil Code §1103 at every sale; (4) for new construction adjacent to designated open-space wildfire land, the 50-foot non-combustible buffer required by Vacaville Municipal Code Chapter 14.20.290 (Development Standards for New Construction Adjacent to Open Space Lands Where Wildfire is a Threat).