Santa Cruz County, CA Fire Regulations: Wildfire Zones (2026)
Key Facts
- Hazard mapping
- Most unincorporated land High/Very High FHSZ
- Very-high areas
- Includes Boulder Creek, Freedom Blvd corridor
- CZU fire (2020)
- 86,509 acres, ~1,490 structures, 1 death
- WUI building code
- CBC Ch. 7A / CRC R337; SCC 12.10.215(D), 12.10.220(H)
- Defensible space
- 100 ft required (PRC 4291)
Summary
Most of unincorporated Santa Cruz County is mapped High or Very High Fire Hazard Severity Zone, with extensive Wildland-Urban Interface. The 2020 CZU Lightning Complex burned 86,509 acres and destroyed about 1,490 structures. WUI building standards and 100-foot defensible space apply.
Fire Hazard Severity Zones The Fire Hazard Severity Zone (FHSZ) maps are developed using a science-based and field-tested model that assigns a hazard score based on the factors that influence fire likelihood and fire behavior. Many factors are considered such as fire history, existing and potential fuel (natural vegetation), predicted flame length, blowing embers, terrain, and typical fire weather for the area. There are three levels of hazard in the State Responsibility Areas: moderate, high, and very high. Fire Hazard Severity Zone maps evaluate "hazard," not "risk". They are like flood zone maps, where lands are described in terms of the probability level of a particular area being inundated by floodwaters, and not specifically prescriptive of impacts.
Full Breakdown
Santa Cruz County is one of California's most wildfire-exposed counties, with a very large share of its area in the Wildland-Urban Interface and the great majority of unincorporated land mapped as High or Very High Fire Hazard Severity Zone (FHSZ). The state Office of the State Fire Marshal (OSFM) and CAL FIRE adopted updated FHSZ maps in 2024-2025; in Santa Cruz County, very-high-hazard areas include parts of Boulder Creek and along Freedom Boulevard, with high hazard across much of the unincorporated county and moderate hazard near communities such as Felton, Ben Lomond, and Soquel.
The danger is not theoretical: the August 2020 CZU Lightning Complex burned 86,509 acres across Santa Cruz and San Mateo counties, destroyed roughly 1,490 structures, caused one death, and forced large evacuations before containment on September 22, 2020. 220(H)) on new structures, additions, and exterior alterations. Owners must also maintain 100 feet of defensible space under Public Resources Code 4291. Buyers in these zones receive natural-hazard disclosures.
Violations & Fines
Building or altering structures in mapped FHSZ/WUI areas without ignition-resistant (Chapter 7A / R337) construction, or failing to maintain required defensible space, violates county building standards and PRC 4291. Non-compliant defensible space can trigger citations and abatement.
Frequently Asked Questions
Is my unincorporated Santa Cruz County property in a fire hazard zone?
What special building rules apply in the fire-hazard zones?
Sources & Official References
Other rules in Santa Cruz County
California rules heatmap·Compare Santa Cruz County to another location·View the California fire regulations overview
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