Zone 0 Fencing Requirements in Los Angeles: What Homeowners in Fire Hazard Zones Need to Know

If your property is in a Very High Fire Hazard Severity Zone in Los Angeles — and a large portion of the Valley and hillside communities are — California's Zone 0 regulations directly affect what kind of fence you can have within five feet of your home.

This is one of the most significant changes to California residential property law in decades. Here's what it means, when it takes effect, and what Woodland Hills and San Fernando Valley homeowners need to do about it.

What Is Zone 0?

Zone 0 — officially the "ember-resistant zone" — is the five-foot perimeter immediately surrounding your home, including attached decks and stairs. It was created by California Assembly Bill 3074, signed in 2020, and directed at reducing the most common cause of home loss in wildfires: wind-driven embers.

Research consistently shows that homes ignite during wildfires primarily from embers, not from direct flame contact. Embers travel miles ahead of the fire line and accumulate in corners, against walls, and along fencing. Zone 0 is designed to eliminate the fuel sources in that critical five-foot zone.

The key implication for fencing: any fence attached to or running within five feet of your structure — including the point where it meets your house or gate — must be non-combustible in applicable fire hazard zones. Wood and vinyl fences don't meet that standard. Iron, steel, aluminum, and masonry do.

When Does Zone 0 Take Effect in LA?

The regulations under AB 3074 were finalized in late 2025, with enforcement beginning in 2026. Governor Newsom's Executive Order N-18-25 (February 2025) directed the State Board of Forestry and Fire Protection to expedite finalization.

Timeline:

• •New construction: Zone 0 compliance required at permit issuance, effective 2026
• •Existing homes in VHFHSZ: Three-year compliance window — meaning the practical deadline for existing homeowners is approximately 2029
• •SB 504 (2024): Confirmed that both existing and new structures are subject to the same Zone 0 standards

The three-year window for existing homes is real, but contractors who do this work are already getting booked out. Don't wait for 2028.

Does Zone 0 Apply to Your Property?

Zone 0 applies to properties in:

• •State Responsibility Areas (SRA): Wildland areas where CAL FIRE provides fire protection
• •Very High Fire Hazard Severity Zones (VHFHSZ): Designated areas within cities and counties with elevated wildfire risk

Woodland Hills, West Hills, Tarzana, Chatsworth, Porter Ranch, Granada Hills, Encino, Sherman Oaks, and significant portions of the hillside communities throughout the San Fernando Valley are either already in designated VHFHSZs or were added in the 2025 CAL FIRE zone map update — which substantially expanded Very High designations in suburban LA neighborhoods that previously weren't flagged.

If you're not sure whether your parcel is in a VHFHSZ, use the CAL FIRE Fire Hazard Severity Zone Viewer at osfm.fire.ca.gov. Enter your address and it will show your current designation.

What Zone 0 Actually Requires for Fencing

The requirement for fencing in Zone 0 is straightforward: combustible fencing attached to or within five feet of your structure must be replaced with non-combustible material.

What's prohibited in Zone 0:

• •Wood fencing (any species) that connects to or runs within five feet of the home
• •Vinyl fencing in the same configuration
• •Combustible gates attached to the house structure

What's compliant:

• •Tubular steel or ornamental iron (powder-coated)
• •Aluminum fencing
• •Masonry — concrete block, brick, stucco wall systems
• •A non-combustible transition section connecting a wood fence run to the house

A common practical solution for homeowners who want to keep most of their wood fence: replace only the section of fence within five feet of the house with a short run of metal, transitioning back to wood beyond that point. This is code-compliant and considerably less expensive than replacing an entire fence line.

Zone 0 also requires:

• •No combustible items stored against the structure (woodpiles, lumber, combustible patio furniture)
• •Non-combustible ground cover preferred within the zone (gravel, concrete, pavers)
• •No combustible vegetation touching the structure
• •Regular debris removal (leaves, needles, dead plant material)

A metal fence with dead leaves piled against it and firewood stacked at the base is not compliant — the fence material is only one piece.

Insurance Implications

This is increasingly relevant for Valley homeowners. California insurance carriers are using property-level wildfire risk models when deciding whether to renew or write policies. Defensible space compliance — including Zone 0 — is one of the factors these models evaluate.

Properties with non-combustible fencing near the structure, cleared Zone 0 zones, and documented compliance with AB 3074 standards are better positioned to retain coverage and may see reduced premiums. Properties that are visibly non-compliant are increasingly flagged as elevated risk.

This isn't hypothetical. After the 2025 Palisades and Eaton fires, the relationship between defensible space and insurance availability became a direct conversation for hundreds of thousands of LA homeowners.

What to Do If You Have a Wood Fence Attached to Your House

If you have a wood fence that runs along the side of your home or through a gate attached to the structure, here's the practical path forward:

1. Check your FHSZ designation at the CAL FIRE viewer
2. Identify the Zone 0 perimeter — five feet from every exterior wall, deck, and attached structure
3. Assess which fence sections fall within that perimeter — typically where the fence meets the house, through gate hardware, or along a close side yard
4. Plan a non-combustible transition — a short run of iron, steel, or aluminum where the fence meets the structure, with wood resuming beyond the five-foot mark

This is exactly the type of project we handle regularly now in Woodland Hills and throughout the Valley. We can walk the property with you, identify the non-compliant sections, and give you options that satisfy Zone 0 without requiring a full fence replacement if the rest of your fence is in good shape.

Contact us for a free estimate. We know the code, and we know the Valley.

Ready to Start Your Fence Project?

Contact Infinity Fence Company for a free estimate today.