Start here: does it cover you?
The answer turns on one distinction almost every other page blurs. In the State Responsibility Area, Zone 0 applies to every building and structure regardless of fire hazard class. In a Local Responsibility Area, it reaches only areas designated Very High — and only once your city or county has adopted that designation by ordinance.
Which state wildfire rules reach your property?
Three questions. This is orientation, not a determination — only the fire agency with jurisdiction over your address can tell you for certain.
Yes — and hazard class doesn't matter. In the State Responsibility Area the 100-foot defensible space law, Public Resources Code 4291, applies to you today, whatever your hazard class. What inspectors check →
Zone Zero would apply the same way, to every structure regardless of class, but the Board withdrew it from review on September 8, 2026 and it is not law. Your hazard class still matters in one place: selling. A High or Very High rating brings AB 38 disclosure.
Sources: PRC 4291; Informative Digest, Notice of Proposed Emergency Action, 20 August 2026.
Yes. In an adopted local Very High zone, Government Code 51182 already requires 100 feet of defensible space, and your local fire agency enforces it. The statewide Zone Zero rule would also reach you, but it was withdrawn and is not law.
Your local agency may also have its own Zone 0 ordinance that is stricter or on a different timeline. Check your jurisdiction →
Probably, once your city or county adopts the map. The State Fire Marshal recommends hazard zones; your local agency adopts them by ordinance under Gov Code 51179(a), within 120 days of receiving the recommendations.
Until that adoption happens, the designation your property sits in may not yet be the operative one. Call your local fire agency and ask whether the current maps have been adopted.
Mostly not, under state law. In a Local Responsibility Area, the state's 100-foot defensible space law and the Zone Zero rule reach only Very High zones.
Two exceptions. If your zone is High, AB 38 still applies when you sell: you must give the buyer defensible space documentation. And your city or county can extend any of this by ordinance, so check. The insurance discounts for the same work do not depend on your zone at all. See the insurance side →
State wildfire law does not reach you. A property in a Local Responsibility Area that sits in no fire hazard severity zone is outside the state defensible space law, AB 38 and the Zone Zero rule. Your city or county can still set its own rules.
The work still has value — the same measures earn documented insurance discounts regardless of your zone. See the insurance side →
Find this out first — everything else depends on it. The State Responsibility Area is where the state has primary financial responsibility for wildfire protection under PRC 4125. It excludes land inside city limits and federal land. Local Responsibility Areas are incorporated cities and certain unincorporated areas where local agencies provide fire protection.
Two ways to check: look your parcel up in CAL FIRE's Fire Hazard Severity Zone viewer, which shows both the responsibility area and the hazard class, or call the fire agency that would respond to your address and simply ask.
Four deadlines, not two phases
Every summary of this regulation, including the Board's own, describes two phases: three years and five years. The rule text has four separate compliance dates, and the first one lands the day the regulation takes effect.
Due on day one for existing homes — whenever day one arrives. Roof and gutters clear of debris. No firewood stored in Zone 0. No dead or dying tree branches. Live branches at least 10 feet from chimneys. And no live tree branches underneath your eaves.
That last one is not a maintenance chore — for a mature tree close to the house it can mean real money, and it lands immediately rather than in three years. All four tiers, with citations →
Day one is the day the regulation is filed with the Secretary of State. The Board withdrew the package from OAL on September 8, 2026, so that day has not arrived and none of this is enforceable yet. Most of this list is separately required already under Public Resources Code 4291 and Government Code 51182. Where the rule stands →
Two things nobody is reporting
State enforcement waits on a funding finding
Public Resources Code 4291(h) bars the Office of the State Fire Marshal from changing defensible space inspection practices, forms, or enforcement to implement the ember-resistant zone until the State Fire Marshal posts a written finding that the Legislature has appropriated sufficient resources. The Board's own fiscal statement expects that in the 2027–2028 fiscal year.
So the obligations begin, and state enforcement follows roughly two years later. What that means in practice →
New construction is gated on a document that doesn't exist yet
Under PRC 4291(g)(1) and Gov Code 51186(b)(2)(A), the requirements for new structures do not take effect until the Board updates and posts its defensible space guidance document. "Applies immediately to new construction" is conditional on that publication. More →
The same work pays you back
California requires insurers that price on wildfire risk to discount for specific mitigation measures under 10 CCR 2644.9. The California FAIR Plan's own schedule runs to 16.4% off the wildfire portion of a Dwelling Fire premium. The ten property-level measures map almost exactly onto Zone 0 — so one set of work, and one photo file, serves both.
The regulation also gives you a right most homeowners have never used: when an insurer gives you a wildfire risk score, it must tell you which measures would lower it and the dollar premium reduction each one would produce. How to use that →
Where to next
- Am I covered?SRA vs LRA, and the map question
- The four deadlinesWhat's due when, with rule citations
- What Zone 0 requiresPlants, trees, fences, decks, outbuildings
- ExemptionsHabitat land, noncombustible structures, local alternatives
- What it costsThe state's own estimate: $960 average
- Insurance discountsUp to 16.4%, and your right to a priced list
- Selling a homeAB 38 disclosure and defensible space documentation
- By jurisdictionWhere local rules differ from the state's
- Rule statusWithdrawn from OAL September 8, 2026 — what that means
How this site is sourced. Everything here is read from primary documents: the rule text as filed with the Office of Administrative Law, the Board's Notice of Proposed Emergency Action, the economic impact statement, the insurance regulation, and each jurisdiction's own published guidance. Where those documents disagree with each other — and in a few places they do — the page says so and tells you which one controls.