Wildfire Zones: Carlsbad vs San Marcos
How do wildfire zones rules compare between Carlsbad, CA and San Marcos, CA?
Carlsbad and San Marcos have similar restriction levels.
Carlsbad, CA
San Diego County
Updated FHSZ maps. New buildings in Very High zones: 100 ft defensible space + ignition-resistant construction. AB-38 inspections for real estate. Coastal location reduces but does not eliminate risk.
View full Carlsbad rules →San Marcos, CA
San Diego County
Most of unincorporated San Diego County is mapped as a Very High Fire Hazard Severity Zone and Wildland-Urban Interface (WUI) area. The County Consolidated Fire Code imposes WUI building standards, 100-foot defensible space, structure setbacks, and ignition-resistant construction. CAL FIRE and the County Fire Authority enforce these rules.
View full San Marcos rules →Key Facts Comparison
| Fact | Carlsbad | San Marcos |
|---|---|---|
| FHSZ Maps | Updated | - |
| Defensible Space | 100 ft (Very High) | - |
| AB-38 | Real estate inspections | - |
| Construction | Ignition-resistant (Ch. 7A) | Ignition-resistant (CBC Chapter 7A) |
| Fire Dept | carlsbadca.gov/fire | - |
| Hazard designation | - | Very High Fire Hazard Severity Zone (CAL FIRE) |
| WUI standards | - | County Fire Code Ch. 47 / Appendix II-A |
| Structure setback | - | Min 30 ft from property lines (Sec. 4707.1.1) |
| Defensible space | - | 100 feet (Secs. 68.401-68.406) |
| Road width | - | Min 24 ft for >2 dwellings |
Highlighted rows indicate differences between cities.
Carlsbad FAQ
Fire zones in Carlsbad?
Yes. Updated maps identify Very High areas despite coastal location.
Selling home?
AB-38 requires inspection in High/Very High zones.
New construction?
100 ft defensible space + ignition-resistant materials.
San Marcos FAQ
Is my unincorporated property in a wildfire zone?
Much of unincorporated San Diego County is mapped by CAL FIRE as a Very High Fire Hazard Severity Zone and Wildland-Urban Interface area. You can check the CAL FIRE fire hazard severity zone maps or the County's GIS to confirm your parcel's designation.
What extra rules apply to building in a WUI fire area?
New construction must use ignition-resistant materials (California Building Code Chapter 7A), meet minimum 30-foot structure setbacks (County Fire Code Sec. 4707.1.1), provide compliant fire-apparatus access roads, and maintain 100 feet of defensible space.
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