Zone 0 Just Became Law. What It Means for Your Leased Estate

On August 19 the California Board of Forestry and Fire Protection voted unanimously to approve the first Zone 0 defensible space regulations in the country. Five feet. That's the whole idea. The strip of ground immediately against your house now has rules, because that's where wind-driven embers collect and where a lot of homes that burn in a wildfire first catch.

I manage estates in Woodside, Portola Valley, and the western edge of Los Altos Hills. Every one of them is going to be subject to this. And every one of them has a tenant in it, which turns a landscaping question into a lease question that most leases on the Peninsula don't answer.

What the Board Approved

The rules phase in, which is the part getting lost in the coverage.

In the first three years, you clear combustible material out of the five feet nearest the structure. Dead leaves and branches, firewood stacked against the wall, bark mulch and wood chips, dead or dying plants. Trees get trimmed, gutters get cleaned.

By year five it gets considerably more specific. All vegetation out of the first foot, or out to the drip line under the eaves if that's farther. No plants within two feet of windows, doors, or vents. Nothing growing within five feet of an attached deck. Tree branches trimmed to at least five feet above the roof, with lower limbs removed six feet up on mature trees. No branches within ten feet of a chimney. An attached wooden fence needs its first five feet nearest the house replaced with something non-flammable. Sheds inside the five-foot band need non-combustible roofs and walls.

You're not required to have bare dirt. Well-maintained herbaceous plants in spaced groupings are fine, and the Board specifically called out begonias and petunias. Low ground covers, maintained grass, and potted plants under about a foot and a half all pass.

The Board approved the language on August 19. State review runs the first week of September, followed by a short public comment window, and the expectation is that it takes effect around the end of September. New construction has to comply immediately once it's in force.

Whether It Applies to You

Roughly two million California homes fall under this. Around nine to ten thousand of them are in Santa Clara County, according to the Santa Clara County FireSafe Council.

You're covered if you're in a state responsibility area, or in a very high fire hazard severity zone within a local responsibility area. On the Peninsula that sweeps in a lot of Woodside and Portola Valley, the hill parcels above Los Altos Hills, the western fringe of Atherton, and pockets of unincorporated San Mateo County that most owners think of as suburban rather than wildland.

If you don't know your parcel's designation, look it up rather than assume. I've had two owners this year who were certain they were outside the zone and weren't. The line follows terrain and fuel, not city limits, and a flat lot with an oak canopy over it can land inside while a steeper parcel two streets over sits outside.

The Lease Problem Nobody Has Solved

Here's what I keep running into. The obligation runs to the property, which means it runs to you. The person who'd notice a pile of bark mulch against the foundation is your tenant, who has no obligation to care. And the person who put the bark mulch there in the first place is your landscaper, who's on your contract and takes direction from your management company.

A standard Peninsula luxury lease says the tenant maintains the grounds, or says the owner provides landscaping, and stops there. Neither version tells anyone who's responsible for a regulatory standard that didn't exist when the lease was signed.

I'd fix this at renewal rather than mid-term, and I'd fix it by taking the work off the tenant entirely. Put Zone 0 compliance on the owner, performed by the owner's vendor, with a right of access on reasonable notice to do it. Then add one obligation on the tenant's side: don't store combustible material within five feet of the house. That's it. No firewood against the wall, no cardboard stacked by the back door, no propane on the deck.

The reason to split it that way is that tenants at this price point don't do yard work and shouldn't be asked to. What they do is put things places. A $28,000-a-month tenant will absolutely stack firewood against the south wall in November because it's convenient to the fireplace, and you want a sentence in the lease you can point at when you ask them not to. This belongs alongside the other clauses that earn their keep on a high-end lease.

What It Does to Your Landscaping Contract

Most estate landscaping contracts on the Peninsula are written around appearance. Mow, blow, prune, seasonal color, irrigation checks. Zone 0 is a different job, and if you don't name it, it won't get done.

So add the five-foot band as a named scope item with a stated frequency. Leaf litter against a foundation reaccumulates in weeks, not seasons, and a quarterly visit won't hold it.

Then deal with the mulch. Bark is the default on nearly every high-end property on the Peninsula, and crews will re-apply it out of habit unless your contract says otherwise. Specify what replaces it in that band, whether that's gravel, decomposed granite, or bare soil. This is a smaller change than it sounds like and it's the one I've had to repeat most often.

The recurring cost of all this is modest on the estates I run. The one-time cost varies wildly depending on what's already planted against the house, and there's an irritating inverse relationship at work: the properties with mature foundation plantings, the ones that photograph best, are the expensive ones to bring into compliance.

The Insurance Question

I want to be careful here, because this is where owners are getting ahead of the facts.

Compliance does not guarantee you a better premium. That connection hasn't been established, and nobody at the Board or the carriers has promised it. Given how brutal the Peninsula insurance market has been, I understand why owners want to believe otherwise.

What I'd say is narrower and I think defensible: documented compliance is one more thing to hand an underwriter who's deciding whether to write or renew you, and on a high-value placement those decisions are made by a human reading a file. Photograph the work, date the photos, keep the vendor invoices. If it helps at renewal, you'll have it. If it doesn't, you did the work anyway, and you were going to have to.

Enforcement Is Not the Point Yet

Fines start at $100 and local fire agencies have discretion over whether to issue them. The stated emphasis is education. Oakland's fire department has already said it won't fine people, though it will charge a re-inspection fee of about $300.

So the immediate financial risk is small, and I'd ignore it. The risk that matters is the house. Santa Clara County has nine or ten thousand homes in this category and the reason the Board wrote the rule is that the five feet nearest a structure is where a survivable fire becomes a total loss. Local jurisdictions can also grant exceptions based on risk, response resources, and evacuation routes, subject to council or supervisor approval, so your city may end up with its own wrinkle.

What I'd Do This Fall

Confirm your parcel's designation. Walk the five feet around the house yourself, or have your manager send you photographs of it, and look specifically at what's touching the walls.

Get the mulch out before the first red flag warning of the season. That's the single highest-value hour of work on this list and it costs almost nothing.

Then handle the lease at renewal, not now. Mid-term amendments on a luxury tenancy are a negotiation you don't need, and the phase-in gives you until roughly 2029 on everything except the basic clearing. You have time to do this properly.

The fence detail is the one I'd flag for anyone planning capital work. If you're replacing a wooden fence anyway in the next few years, do the first five feet in metal or masonry now and you've quietly satisfied a year-five requirement while you had the crew on site. Same logic as any other deferred maintenance on an older estate: the cheap moment to fix something is when you're already paying someone to be there.

If you own a Peninsula estate and want a straight assessment of what this means for your property and your lease, schedule a confidential consultation. We manage properties across Woodside, Portola Valley, Atherton, and Los Altos Hills.

Sources

• California Zone 0 wildfire rules: What homeowners must clear around their homes — The Press Democrat
• Defensible Space Zones 0, 1 and 2 — California Board of Forestry and Fire Protection
• California approves Zone 0 rules: What homeowners need to know — KRCR
• First-in-the-Nation Zone 0 Defensible Space Regulations Approved — Contra Costa News
• Luxury Homes Are Raising Risks for California's Insurer of Last Resort — Insurance Journal
• Fire Hazard Severity Zones — CAL FIRE Office of the State Fire Marshal