Is Zone 0 Required in Altadena?
Is your Altadena property in the Very High zone?
Enter your address to check it against the CAL FIRE statewide Fire Hazard Severity Zone map. The check shows hazard-zone status; it does not create a Zone 0 requirement.
If you are rebuilding, the first five feet is cheapest on paper
We have not identified a local or statewide Zone 0 rule that applies to Eaton Fire rebuilds today, and we do not state one here. The statewide draft is Proposed — not in force. Permit and building-code requirements for a rebuild come from the agency that issues your permit, so confirm what applies with LA County before you finalize plans.
Separately, planning the first five feet noncombustible from the start is Recommended now, and it costs less than retrofitting later. Hardscape instead of mulch beds, a noncombustible gate panel where the fence meets the house, ember-resistant vents specified on the plans. Done on paper, these are line items. Done after landscaping is in, they are demolition.
See the hardening checklist →Altadena knows what embers can do
On January 7, 2025, the Eaton Fire pushed out of the San Gabriel foothills on extreme winds. It burned 14,021 acres, destroyed more than 9,400 structures, and killed 19 people. The overwhelming share of that loss happened here in Altadena.
Street after street, homes ignited from embers landing in the small combustible details: fences, mulch, dry plantings against siding. The first five feet is exactly where those details sit. This page will not dramatize what this community lived through. It exists so the rebuilt Altadena is harder to burn than the one the wind took.
Whether you are rebuilding, repairing, or your block was spared, the first five feet is the highest-leverage place to act, whatever rule ends up applying to your parcel.
Altadena's fire history, told plainly →Three labels, used the same way on every page
As of September 19, 2026 there is no statewide Zone 0 regulation in force in California, and we have not identified a local Zone 0 ordinance for Altadena. Existing defensible-space law still applies.
Existing law
PRC §4291 and Gov. Code §51182 already require roofs and gutters to be kept clear of leaves and needles, and branches within 10 feet of a chimney outlet to be removed. We have not identified a local Zone 0 ordinance for Altadena.
Statewide Zone 0 draft
The Board of Forestry approved a draft on August 19, 2026, but the emergency filing (OAL file 2026-0828-03E) is listed as withdrawn on September 8, 2026. It has no effective date. If it takes effect, it would apply in SRA / Very High Fire Hazard Severity Zones.
Clear the first five feet
Mulch, dead plants, firewood, and stored items out; noncombustible ground cover in. This is effective prevention whether or not a Zone 0 rule ever applies to your parcel. LA County Fire lists a 100-foot defensible-space radius as a recommendation.
Harden vents and fence connections
Ember-resistant vents and a noncombustible panel or gate where a fence meets the house are worth doing, rebuild or not. No deadline is attached to either.
LA County Fire is the fire authority in Altadena
Altadena is unincorporated, so there is no city fire department here. The Los Angeles County Fire Department is the fire authority, and its Defensible Space program covers unincorporated LA County. The county's page lists chimney clearance as required and a 100-foot defensible-space radius as a recommendation. It does not list Zone 0 as a requirement.
That is not a Zone 0 rule. As of September 19, 2026 we have not identified a county Zone 0 ordinance for Altadena. Confirm with LA County Fire before acting on any deadline.
Built for this community, not copied from another one
Altadena is a foothill town with its own institutions, its own history, and now its own rebuild. The organizations below are part of how this community talks to itself about recovery and fire safety. We reference them factually; we are not affiliated with any of them.
Altadena Town Council
The elected advisory council for unincorporated Altadena, and the community's main channel to LA County government on rebuild and fire-safety policy.
Altadena Library District
An independent library district serving Altadena, and a longstanding community gathering point for recovery information and public meetings.
Christmas Tree Lane
The historic mile of deodar cedars on Santa Rosa Avenue survived the Eaton Fire, and its lights returned in December 2025, eleven months after the fire.
Altadena Heritage
The local preservation organization documenting Altadena's architecture and history, including the community's long record of foothill fires.
Eaton Canyon Natural Area
The canyon at Altadena's eastern edge that gave the 2025 fire its name, and a reminder of how directly this community borders wildland.
Quick answers for Altadena homeowners
Is Zone 0 required in Altadena?
As of September 19, 2026 we have not identified a local Zone 0 ordinance for Altadena. The statewide Zone 0 draft is Proposed — not in force. Existing law (PRC §4291 and Gov. Code §51182) is Required now. Clearing the first five feet is Recommended now. Confirm with LA County Fire before acting on any deadline.
Is Zone 0 a statewide law in California?
As of September 19, 2026 there is no statewide Zone 0 regulation in force in California. The Board of Forestry approved a draft on August 19, 2026, but the emergency filing (OAL file 2026-0828-03E) is listed as withdrawn on September 8, 2026. Existing defensible-space law (PRC §4291 and Gov. Code §51182) still applies, including keeping roofs and gutters clear of leaves and needles.
Who is the fire authority in Altadena?
The Los Angeles County Fire Department. Altadena is unincorporated LA County, so there is no city fire department. LA County Fire's Defensible Space program covers unincorporated LA County. We have not identified a county Zone 0 ordinance for Altadena.
I am rebuilding after the Eaton Fire. Does Zone 0 apply to my rebuild?
We have not identified a local or statewide Zone 0 rule that applies to Eaton Fire rebuilds today. The statewide draft is Proposed — not in force. Confirm what applies to your permit with LA County before you finalize plans. Designing the first five feet noncombustible from the start is Recommended now.
Is Zone Zero the same as LA County brush clearance?
No. LA County Fire's Defensible Space program covers a wider area around your home; the county lists chimney clearance as required and a 100-foot radius as a recommendation. Zone 0 is the first five feet only. Where no Zone 0 rule applies, clearing those five feet is still Recommended now.
Have a question about your first five feet?
Send a request and the team will follow up by email, whether you are rebuilding or hardening a home that stood. Prevention in the first five feet is effective and something you can start now.