Zone Zero applies to all fencing and gates within 5 feet of any structure, not just at the point of attachment. The full length of fence running within that 5-foot perimeter must be non-combustible. Fencing more than 5 feet from any structure is not affected by Zone Zero (though existing defensible space zones 1 and 2 still apply further out).

The April 2026 draft regulations do not explicitly address repairs to existing fencing. The no-new-combustible-fences rule applies upon adoption, which may restrict like-for-like repairs with wood. Check with your local AHJ before repairing existing wood fencing within Zone Zero after adoption.

Yes. Two tropical hardwood products have earned Class A flame spread ratings from the California Office of the State Fire Marshal: KAYU Batu (Red Balau) and KAYU Golden Bangkirai (Yellow Balau). The April 2026 draft specifies non-combustible materials, however, so acceptance of Class A hardwoods varies by local AHJ. Verify with your fire authority before specifying these products.

Standard vinyl and PVC fencing is combustible and does not comply with Zone Zero. Some composite products may have fire-resistant ratings. Check the OSFM Building Materials Listing for California-approved products. When in doubt, steel, aluminum, wrought iron, masonry, and concrete block are the safest choices.

Each property owner is responsible for their own side of a shared fence. If the fence runs within 5 feet of your structure, you are responsible for replacing your side with compliant materials regardless of what your neighbor does. For HOA-managed fencing, the HOA bears responsibility for common area fences. Confirm specifics with your HOA documents.

Use our free assessment tool to connect with a licensed local contractor who specializes in Zone Zero fencing compliance. We match you with contractors in your area who are familiar with local AHJ requirements, approved materials, and Phase 2 timelines.