Zone Zero Fence Rules in Altadena
Zone Zero Altadena / Fences & Gates
A wood fence is a fuse connected to your house
Embers do not need to reach your house. They only need to reach your fence. A wooden fence that touches the home carries fire straight to the wall, the eave, the attic vent. IBHS ember research is why fences are called out by name in the April 2026 draft.
Altadena saw this mechanism at neighborhood scale in January 2025. On blocks where the flame front never arrived, embers riding extreme winds found fences, mulch, and stored items, and the fires they started moved house to house.
The rebuild makes this page unusually practical: thousands of Altadena fence lines are being designed from scratch right now. Getting the five feet nearest the structure right costs nothing extra on paper.
What a Zone 0 compliant fence looks like
Three material paths, and one shortcut. Compliance is about the five feet nearest your home, not necessarily the whole fence line.
Metal
Steel, aluminum, and wrought iron all pass in Zone Zero. Powder-coated steel is the most common like-for-like swap for wood privacy fencing.
Masonry & block
Block walls, brick, and stone are noncombustible and permanent. Highest cost, zero maintenance, best ember protection.
Fire-rated composite
Some composite products carry fire ratings expected to comply under the final regulations. Verify the listing before you buy. Most standard composite is combustible.
The critical 5 feet
You may not need to replace the whole fence. A noncombustible gate or panel where the fence meets your house breaks the fuse. On a rebuild lot, just draw it that way.
Fence questions, answered
I am rebuilding after the Eaton Fire. Can I put back the wood fence I had?
Not within the first 5 feet of the house, once final regulations adopt. New combustible fences in Zone 0 are prohibited immediately at adoption with no grace period, and rebuild fencing installed in 2026 or later will live under that rule for its whole life. Put noncombustible material in the five feet nearest the structure from the start.
Do standing Altadena homes have to tear out wood fences right now?
No. Existing fences fall under Phase 2, and LA County sets that deadline, up to 5 years after adoption. But fence-to-house connections burned homes across Altadena in January 2025, so replacing the connection point early is the highest-value move available.
Can I keep most of the fence and replace just the last section?
Usually, yes. The regulation targets the 5 feet nearest the structure. A metal gate or noncombustible panel at the connection point is the most cost-effective compliance path on many Altadena lots, especially the narrow side yards typical of older Craftsman-era parcels.
Does vinyl fencing comply?
No. Standard vinyl is combustible and deforms under radiant heat. Metal, masonry, or verified fire-rated products are the compliant options.
Fence it right the first time
A CSLB-licensed fence contractor can tell you whether a full replacement, a connection-point swap, or a rebuild-spec design is the right call. The assessment is 100% free.