Wildfire Zones: Bonsall vs Vista
How do wildfire zones rules compare between Bonsall, CA and Vista, CA?
Bonsall and Vista have similar restriction levels.
Bonsall, CA
San Diego County
Much of unincorporated San Diego County is designated as a Very High Fire Hazard Severity Zone (VHFHSZ) by CAL FIRE. Properties in these zones must meet enhanced building standards, defensible space requirements, and fire-resistant landscaping per the County's Consolidated Fire Code.
View full Bonsall rules →Vista, CA
San Diego County
Portions of Vista are designated as Wildland-Urban Interface (WUI) zones, requiring enhanced fire-resistant construction, defensible space clearance, and vegetation management. Vista Fire Department enforces these standards under California Fire Code and local amendments.
View full Vista rules →Key Facts Comparison
| Fact | Bonsall | Vista |
|---|---|---|
| Designation | CAL FIRE Very High Fire Hazard Severity Zone | - |
| Building Code | CBC Chapter 7A — exterior wildfire exposure | - |
| Materials | Fire-resistant roofing, walls, windows, decking | - |
| Defensible Space | 100 ft required (Zones 0/1/2) | 100 ft required (PRC 4291) |
| Authority | County Fire Authority reviews permits | - |
| Fire Zones | - | VHFHSZ in eastern hillsides |
| Zone 1 Clearance | - | 0–30 ft lean, clean, green |
| New Construction | - | CBC Chapter 7A fire-resistant |
| Contact | - | Vista Fire (760) 643-5400 |
Highlighted rows indicate differences between cities.
Bonsall FAQ
Is my property in a wildfire zone in San Diego County?
Many properties in unincorporated San Diego County are in Very High Fire Hazard Severity Zones. Check the CAL FIRE Fire Hazard Severity Zone map or contact County Planning & Development Services with your property address.
What building materials are required in wildfire zones?
Properties in VHFHSZ must use fire-resistant roofing (Class A), ignition-resistant exterior walls, tempered or multi-pane windows, and non-combustible decking materials per California Building Code Chapter 7A.
Do wildfire zone requirements apply to existing homes?
Existing homes are generally grandfathered but must comply with defensible space requirements. Major remodels, additions, or roof replacements trigger compliance with current fire-resistant building standards.
Vista FAQ
Is my Vista property in a wildfire zone?
Eastern hillside areas and properties near open space in Vista may be in Very High Fire Hazard Severity Zones. Contact Vista Fire at (760) 643-5400 or check CAL FIRE's FHSZ maps.
How much defensible space is required in Vista?
Properties in fire hazard zones must maintain 100 feet of defensible space: Zone 1 (0–30 ft) lean, clean, and green; Zone 2 (30–100 ft) fuel reduction and plant spacing.
Does wildfire zoning affect building permits in Vista?
Yes. New construction and major remodels in WUI zones must comply with CBC Chapter 7A fire-resistant standards for roofing, walls, windows, and decks.
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