Zone 0 Isn't Law Yet in California — Here's Why I'm Not Waiting on the Final Rule
I get asked some version of this question almost every week now: "Is Zone 0 actually the law yet, or not?" Homeowners have heard enough about California's new ember-resistant zone rule to be worried about it, but not enough to know whether they're required to act on it this year, next year, or at all yet. After the 2018 Woolsey Fire burned through the hills near my home in West Hills, I went through CERT training and started building wildfire defense equipment for homeowners, and I've watched this particular rule take longer to finalize than almost anything else in state fire policy. Here's where it actually stands as of this week, what it will require once it's final, and why I'm telling people not to wait for a signature on a page before they act.
Where the Rule Actually Stands Right Now
California's Board of Forestry and Fire Protection adopted emergency Zone 0 regulations under AB 3074 by an 8-0 vote in August 2026. That sounds like the finish line, but it isn't one. Emergency regulations in California still have to clear the Office of Administrative Law before they take effect, and this one didn't make it through cleanly — it was pulled back from OAL review in early September for technical revisions, with no new submission date announced. As of this week, Zone 0 is not yet an enforceable legal requirement anywhere in California. There is no confirmed statewide effective date, and no confirmed compliance deadline for existing homes. If you've seen a specific date floating around online, I'd treat it as a guess rather than a fact until the Board of Forestry or OAL publishes something official.
What is settled is the direction. The rule is designed to apply to homes in State Responsibility Areas, plus occupied structures in locally designated Very High Fire Hazard Severity Zones within Local Responsibility Areas — in plain terms, most of the hillside and WUI neighborhoods across Southern California, West Hills included. The draft also points toward a multi-year phase-in once it is finalized, reportedly in the range of three to five years for existing homes, rather than an overnight switch.
What Zone 0 Will Actually Require
The zone itself is the five feet measured out from your walls, roof edge, and anything attached to the house — a deck, a stairway, an attached pergola. Based on the most recent draft language, here's the core of what's in it:
- No combustible mulch, bark, or wood chips touching the structure — swapped for gravel, pavers, or other noncombustible ground cover.
- Clean roofs and gutters, with dead leaves, needles, and debris cleared out before fire season, not after.
- Nothing combustible under decks or stairs, including stored items, not just vegetation.
- No firewood storage inside the five-foot zone, even temporarily.
- No new combustible fencing built directly into Zone 0, and a noncombustible section where fencing attaches to the structure.
- Dead branches and ladder fuels removed, with limited, well-maintained nonwoody plants allowed if they meet spacing and height rules.
None of that is exotic. Most of it is closer to "yard discipline" than construction. The part that catches people off guard isn't the list itself — it's assuming none of it applies until a deadline forces it to.
Why I'm Not Waiting for the Ink to Dry
Here's the thing about a regulation that's still finalizing: the fire season isn't waiting for it. The specific legal deadline is genuinely unsettled, but the wildfire risk that the rule is responding to isn't unsettled at all — it's been sitting on these hillsides since before AB 3074 existed, and it'll keep sitting there through however many more rounds of OAL review this takes. Every piece of the draft list above is something you can do this month, for close to nothing, regardless of what the Board of Forestry decides next. I'd rather a homeowner clear their five feet now and find out later it wasn't technically required yet than find out the hard way that it was needed the day a fire actually reached their fence line.
It's also worth saying plainly: Zone 0 compliance, once it is finalized, still only addresses what's touching your house. It's the right first move, but it isn't the whole plan — the equipment layer (a hose matched to your hydrant, a wrench to operate the valve, a nozzle to control the spray) is what you reach for if an ember gets past Zone 0 anyway, whether that's this season or after the rule is officially on the books.
What You Need to Know
- Zone 0 is not yet a legal requirement anywhere in California as of this week. It was adopted by the Board of Forestry but withdrawn from OAL review for revisions, with no confirmed resubmission or effective date.
- Don't trust a specific deadline you see online unless it's sourced to the Board of Forestry or OAL directly — treat anything else as a placeholder.
- The requirements themselves are stable even if the timeline isn't. Clearing combustible mulch, debris, and firewood from your five feet is good practice whether the rule is finalized this year or later.
- A phase-in, once final, is expected to run several years for existing homes — this isn't shaping up to be an overnight mandate, which is one more reason to get ahead of it on your own schedule instead of a forced one.
- Check your local jurisdiction regardless. Some cities and fire districts already enforce defensible-space rules of their own that go further than the state's current baseline.
- None of this replaces an evacuation order. If authorities tell you to go, go — Zone 0 reduces ignition risk, it doesn't put out a fire that's already arrived.
I'd rather homeowners act on the substance of this rule than wait on its paperwork. Clear your five feet, and once that's done, make sure the layer behind it — the equipment you'd actually use if an ember gets through anyway — isn't still sitting in a box in the garage.
Sherwin Ross is the founder of Ace Fire Defense, based in West Hills, CA. After the 2018 Woolsey Fire, he became CERT-trained and started building wildfire defense equipment for homeowners.