Adopted August 19, 2026. The Board of Forestry approved the statewide Zone 0 regulation. It is not yet in effect: review by the Office of Administrative Law comes next. What changes, and when.
The Zone Zero Report California defensible space, fencing & gates · tracked and explained

County guide

Zone 0 in Butte County: one county, both answers

Fact-checked August 23, 2026·Sources at the end of this article

Status check (August 19, 2026): The Board of Forestry approved the statewide Zone 0 regulation on August 19, 2026. It is not yet in effect: the package still needs Office of Administrative Law review (including a five-day public comment period) and publication by the Secretary of State, and no compliance deadline is running yet. Separately, at least nineteen local jurisdictions have their own Zone 0 rules in force now. See the live status tracker.

The short version

  • Butte County holds both extremes of California's local Zone 0 patchwork at once. The Town of Paradise has the strictest fence rule we have verified anywhere in the state. The unincorporated county's ordinance covers the same five feet and never mentions fences at all.
  • In Paradise, all fencing within five feet of any structure must be noncombustible, attached or not, new or existing, with no grandfather clause, and a seller must obtain a certificate of compliance from the town before ownership transfers.
  • In the unincorporated county, Ordinance 4199 (adopted February 9, 2021) allows only low-growing, high-moisture vegetation within five feet of any building. Whether its combustible-materials clause reaches a wood fence is genuinely unresolved, and we say so rather than pick a side.
  • Both were verified from the adopted text. On August 23 we also read Chico, Oroville, Gridley and Biggs from current text: no Zone 0 and no fence rule in any of them, which makes this the rare county where every city's code has been read.
  • The statewide rule, once effective, will add its own requirements on top; nothing statewide binds anyone today.

Two rules five miles apart, pointing in opposite directions

Most counties on our register contribute one answer to the question "is Zone 0 already law here?" Butte contributes two, and they disagree about the thing that costs the most money. Drive out of Paradise's town limits and the ordinance covering the first five feet stops saying anything about fences. Same county, same fire history, opposite answers, which is the clearest illustration we have found of why we keep a register instead of publishing a number.

Both rules predate the statewide regulation and neither depends on it. The Camp Fire destroyed most of Paradise in November 2018; the town's defensible space chapter was first adopted a year later, in November 2019, and the county's ordinance followed in 2021.

Paradise: the strictest fence rule we have verified in California

Paradise Municipal Code Chapter 8.58, "Defensible space/hazardous fuel management," was adopted by Ordinance 581 on November 12, 2019 and its current text runs through Ordinance 642, effective March 13, 2025. Its duty clause is continuous, not annual: any person that owns, leases, controls, operates, or maintains any real property in the town "shall continuously" meet the standards. The Zone 0 provision:

"Maintain immediately around and adjacent to any building or structure free of combustible materials. Only noncombustible material shall be allowed within five (5) feet of any building or structure. No vegetation shall exist within or overhang within five (5) feet of the structure. Any overhanging limbs or branches shall be removed."

Paradise Municipal Code §8.58.060(1)

And the fence rule, which is where Paradise passes every other jurisdiction we have checked:

"All fencing material within five (5) feet from any structure and shall be constructed of noncombustible material. All fencing shall be a single line; back-to-back fencing is not permitted in which fences are nominally parallel and spaced less than three (3) feet apart."

Paradise Municipal Code §8.58.060(4). The stray "and" is in the original.

Read that against the adopted statewide text, which reaches a fence only where it is attached or comes within one foot of contact, and bars only new combustible fences within five feet. Paradise has neither limit: every fence within five feet of any structure, attached or not, new or existing, on every parcel in town. The chapter contains no grandfather clause; we checked for one specifically. An exceptions route exists, through a committee of two council members referring to the full council, and non-compliance is enforceable as a public nuisance.

The certificate that does not wait for an inspector

The provision with the most practical force is not the materials rule. It is this one:

"Prior to transferring ownership of a parcel from a seller to a buyer or from one owner to another, the seller or owner shall first obtain a certificate of compliance from the town stating that the parcel is not in violation of this section prior to the transfer of ownership. Any issued certificate of compliance shall remain valid for ninety (90) days from the inspection date and may be used to open escrow without payment of an additional certificate of compliance fee."

Paradise Municipal Code §8.58.060(G)

Statewide, 248,403 defensible space inspections produced 3 citations in the most recent reported year. A point-of-sale certificate is a different kind of enforcement: it does not depend on an inspector knocking, because escrow does the knocking. If you are buying or selling in Paradise, this clause is on your critical path.

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The unincorporated county: a real Zone 0, and silence on fences

Butte County Ordinance 4199, adopted 4–1 by the Board of Supervisors on February 9, 2021 and effective thirty days later, repealed and replaced Chapter 38A of the county code. Its defensible space section requires, on every parcel in the unincorporated county:

"Maintain the area immediately around and adjacent to any Building free of Combustible Materials. Combustible Materials shall not be stored under decks and the area under decks shall be maintained free of Hazardous Vegetation. Only low-growing vegetation with high-moisture content, such as flowers, ground covers and green lawns, free of dead vegetative debris, shall be allowed within five (5) feet of any Building."

Butte County Ordinance 4199, section 38A-6(a)(1) as printed in the ordinance

That is a genuine ember-resistant zone, in force since 2021, reaching existing structures, enforced as a public nuisance. And in twenty-nine pages, the word "fence" does not appear once.

The wood question, left honestly open

The ordinance defines "Combustible Material" as "seasonal and recurrent weeds, stubble, brush, dry leaves, mulch, wood, tumbleweeds, rubbish, recyclable material, litter or flammable materials of any kind," and requires the area immediately around a building be kept free of them. "Wood" is in that list, so a reading exists on which a wood fence touching a house must go. The contrary reading is at least as strong: every other item in the list is loose debris, which makes "wood" read as firewood and wood waste rather than a permanent structure, and the five-foot sentence itself is about vegetation.

We publish that as unresolved because it is unresolved. The county would answer it in enforcement, and nobody should spend fence money on our guess in either direction. If you need certainty, the Butte County Fire Prevention Bureau is at (530) 538-7888.

Where the statewide rule will reach in this county

Once the statewide regulation takes effect, its requirements will run alongside both local rules, and which track you are on depends on your responsibility area, not your hazard class alone. Paradise is an incorporated town, so its parcels answer to the Local Responsibility Area test; much of the rest of the county's hazard land is State Responsibility Area, where the state rule reaches every hazard class. Local rules that are stricter than the state floor, and Paradise's fence rule is, keep binding on their own terms.

Claims we could not verify

  • The codified section number for the county's defensible space standard. The ordinance prints it as 38A-6, but the county's online code publisher currently shows 38A-6 as "Declaration of nuisance," so either codification renumbered the chapter or a later ordinance amended it. We cite Ordinance 4199, which is unambiguous, and assert no codified number.
  • The county posts two copies of Chapter 38A, and one is an image-only scan with no readable text. Everything quoted here came from the copy with real text. If you pull the ordinance yourself and your PDF will not search, you have the scan.
  • Resolved for all four cities, August 23, 2026. This list previously carried all four cities as unchecked. Chico is now a verified negative: we read the city's fire regulation chapters (Municipal Code Title 16) and the entirety of Chapter 16R.42, the fire regulation standards, which adopt the 2025 California Fire Code as amended through Ordinance 2619 of January 6, 2026. Chico's complete local amendment list touches permits, explosives, tanks, LP-gas, open fires, fireworks, hydrant spacing, rear addressing, and a prohibition on combustible upholstered furniture visible from the public right-of-way. Nothing in it touches the first five feet, defensible space, or fences; the city's only vegetation chapter is a standard weed and rubbish abatement regime. Oroville resolved the same evening: the blocked address turned out to host nothing, and the city's code actually lives with another publisher, codified through April 21, 2026. Its vegetation law is a classic weed-and-rubbish abatement chapter (sections 13.08.170 through 13.08.200): grass and weeds that become "a fire menace when dry" must be cleared curb to lot line by June 15 each year, with fire-chief notices and administrative citations behind it. Code-wide searches for "noncombustible" and "ember" return nothing, and every fence hit is a zoning provision about height and screening. One caveat we carry: the city's February 2026 notice attributes the program to an Ordinance 1890 that the code's own disposition table still lists as pending codification, and describes a thirty-foot defensible-space duty in the high and very high severity zones; until that ordinance's text is published, we treat Oroville as a negative for Zone 0 and fences with one pending ordinance flagged. Gridley and Biggs closed the list the same evening. Gridley's codified building and fire chapter is still the 2007-edition adoption of Ordinance 774, with no wildfire content of any kind, the small-valley-city profile we have seen across the state. Biggs, a CAL FIRE contract city with a code dated November 12, 2025, returns zero results for defensible space and noncombustible, and its one fire-code mention is a nuisance section. Every city code in Butte County has now been read, in the county that produced both the strictest fence rule on our register and a Zone 0 with no fence rule at all.

What this means for you

  1. In Paradise: the fence rule is in force now and reaches existing fences. If any part of your fencing sits within five feet of any structure, it is required to be noncombustible, and a sale cannot close without the town's certificate. Our guide to noncombustible fence materials covers what qualifies.
  2. In the unincorporated county: keep the first five feet to low-growing, high-moisture vegetation and free of stored combustibles. On the fence question, call the Fire Prevention Bureau rather than accepting anyone's confident answer, including ours.
  3. Everywhere in the county: the statewide rule is adopted and not yet in effect, so nothing statewide binds you today, and anyone quoting a statewide deadline is early. The tracker follows the filing.

How often CAL FIRE inspects here

CAL FIRE has 771 parcels in Butte County in its defensible space inspection program in July 2026, the month the dashboard is currently reporting. Of the 724 inspected, 400 were compliant, which is 55 percent. 64 properties have already been found non-compliant more than once.

Two things this does not tell you. These counts cover inspections by CAL FIRE and Contract Counties inside the State Responsibility Area only, so work done by local fire agencies in the Local Responsibility Area is absent entirely. And none of these inspections is checking Zone 0: they are inspections against the defensible space rules in force today, which reach from the structure out to one hundred feet and contain no ember-resistant zone requirement. See the full inspection figures and what they mean, read from CAL FIRE's public dashboard on August 23, 2026.

Frequently asked questions

Is Zone 0 already the law in Butte County?

In two jurisdictions, yes, and differently. Paradise has required a noncombustible five feet, fences included, under its defensible space chapter since 2019, with the current text effective March 2025. The unincorporated county has required a low-combustibility five feet since 2021 under Ordinance 4199, with no fence provision. The statewide rule is adopted but not yet in effect anywhere.

Do I have to replace my wood fence in Paradise?

If any of it stands within five feet of any structure, the municipal code requires fencing there to be noncombustible, and it makes no exception for existing fences. The town operates an exceptions committee, so a variance route exists. The practical trigger for most owners is a sale: the pre-transfer certificate of compliance checks the parcel against the chapter.

Does the county ordinance ban wood fences near houses?

It never mentions fences. Its combustible-materials list includes "wood," and whether that reaches a permanent fence rather than firewood and debris is a question the ordinance does not answer. We treat it as unresolved, and suggest asking the county Fire Prevention Bureau directly.

What happens when the statewide rule takes effect here?

It adds requirements; it does not subtract local ones. Paradise's fence rule is stricter than the adopted state text and keeps binding. The unincorporated county's vegetation rule sits inside the state framework comfortably. Compliance clocks for existing homes run from the statewide effective date, three years in the Local Responsibility Area, extendable to five, and five years in the State Responsibility Area, which the Director may shorten to no less than three.

Sources

  • Gridley Municipal Code Chapter 15.04 (2007-edition code adoptions, Ordinance 774 of 2007), read from the city's code publisher August 23, 2026; Biggs Municipal Code (code dated November 12, 2025), searched and read at the city's code publisher the same day.
  • Oroville Municipal Code sections 13.08.170 through 13.08.200 (weed and rubbish abatement; Ord. 1861 of 2021 the latest codified amendment), read from the city's code publisher at ecode360.com August 23, 2026; code dated April 21, 2026; Ordinance 1890 listed as pending codification in the code's own disposition table.
  • Paradise Municipal Code Chapter 8.58, sections 8.58.040, 8.58.060, 8.58.065 and 8.58.110, read at the town's official code publisher. Ordinance history: Ord. 581 (November 12, 2019) through Ord. 642 (effective March 13, 2025).
  • Butte County Ordinance 4199 (adopted February 9, 2021), read from the county's posted ordinance text, including its section 38A-6 and its definitions at 38A-4.
  • CAL FIRE defensible space inspection totals: our inspections analysis, from the PRC 4137 report.
  • Chico Municipal Code Title 16 (fire regulation chapters 16.42 through 16.52) and Chapter 16R.42, the fire regulation standards, every section read at the city's official code publisher on August 23, 2026.

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