County guide, fact-checked August 20, 2026

Zone 0 in San Bernardino County: no local rule we could find, and a state rule that would reach 3.6 percent of the county

Fact-checked August 20, 2026·Sources at the end of this article

Two sets of rules, and neither one binds your fence today

Most county guides open by separating a local ordinance already in force from the statewide regulation that is not. San Bernardino has none to separate: as of August 20, 2026 we could find no adopted Zone 0 requirement anywhere in the county. We ran full-text searches for "Zone 0", "Zone Zero" and "ember-resistant" against the 89-page CAL FIRE San Bernardino-Inyo-Mono Unit 2026 Strategic Fire Plan, six San Bernardino County Fire Protection District pages, the district's Standard SRA-1, the county's abatement and citation pages, the County Policy Plan Hazards Element and Ordinance No. 4489. Every one returned zero hits, and Big Bear Fire Department's ordinance index carries none either. That is an affirmative negative on the documents named, and only on those.

One document defeated us, and it is the one place a local rule could still sit. SBCoFD Fire Code Ordinance FPD 23-01, the district's adoption of the California Fire Code with local amendments, downloads as a 39.8 MB, 90-page file with zero extractable text: a pure image scan. We cannot quote a word of it, so we make no claim in either direction. Phone SBCoFD Community Safety at 909.386.8400 and ask.

Adopted, not yet in effect: the statewide regulation, the instrument that would eventually carry fence and gate rules into this county. It cleared the Board of Forestry on August 19, 2026 and still needs Office of Administrative Law review and publication by the Secretary of State, so no compliance clock is running. Our timeline and enforcement guide follows that process, and the register lists the jurisdictions with Zone 0 rules we have verified as in force, at least twelve of them. None is in San Bernardino County.

Where the statewide rule will reach in this county

The regulation runs on two separate legal tracks. In the State Responsibility Area (SRA, land where the state carries financial responsibility for wildfire protection) the duty comes through Public Resources Code section 4291 and covers every hazard class. In the Local Responsibility Area (LRA, city and district-protected land) it comes through Government Code section 51182 and covers only mapped Very High Fire Hazard Severity Zones. A High-zone house inside a city sits outside the rule; a Moderate-zone house in the SRA sits inside it.

Now apply that to the largest county in the continental United States. CAL FIRE's unit plan publishes responsibility-area acreage here: SRA 342,532 acres, Federal Responsibility Area 10,431,623 acres, LRA 2,093,726 acres. Those add to 12,867,881 acres, about 20,106 square miles against a published county area of 20,160, so essentially the whole county is accounted for. The percentages below are ours, calculated on the agency's table.

Federal land sits outside the Zone 0 regulation entirely, and here it is four fifths of the county. Narrow it further with the Office of the State Fire Marshal's hazard-zone table, which gives the county 342,483 SRA acres in total and 117,516 Very High acres in the LRA. Add the two tracks and the adopted rule would eventually reach about 459,999 acres, roughly 3.6 percent of the county's land area. That sum is our computation from the OSFM table, with a denominator from the CAL FIRE table, not an agency number. The two SRA totals corroborate each other, differing by 49 acres; the two LRA totals do not, and no source we loaded explains the gap, so we take no position on it. To place your own parcel, start with our address lookup walkthrough.

Who protects you here, and why the mountains are different

San Bernardino is not a CAL FIRE contract county. CAL FIRE protects the SRA directly, through a unit covering "the State Responsibility Area (SRA) portions of San Bernardino, Inyo, and Mono Counties." Everything else runs through independent departments or the county fire district, which protects 19,293 square miles. The mountain arrangement is recent: per the unit plan, "In 2013, CAL FIRE assumed the direct protection of areas of SRA in the San Bernardino Mountains," on a battalion boundary from Crestline to Angelus Oaks, taking 32,542 acres and "35,000 parcels that are subject to LE-100 inspections." That is the PRC 4291 track, state defensible space law enforced by CAL FIRE, not a Zone 0 ordinance. Big Bear Valley has its own department, which handles AB 38 defensible space inspections in the valley "excluding Fawnskin", sending Fawnskin, zip code 92333, to the County Fire Marshal. Running Springs Fire Department is run by the Running Springs Water District.

The district's one recent ordinance on this ground is a mapping instrument. Ordinance No. 4489 designates the Fire Hazard Severity Zones CAL FIRE recommended on its March 24, 2025 maps; adopted June 10, 2025 on the consent calendar, effective July 21, 2025. All four pages do three things: designate zones, provide for severability, set an effective date. No Zone 0, no ember-resistant zone, no fence provision, no defensible-space standard. The district also notes that "state law prohibits the Fire District from assigning a fire hazard severity zone that is less restrictive than the one recommended by the State Fire Marshal."

The five-foot fence rule that does exist here, and why it is not Zone 0

San Bernardino County has had a five-foot noncombustible fence separation in its Development Code since 2007. It is binding, and it is also not what a Zone 0 headline implies. County Code section 82.13.050(j), in the Fire Safety (FS) Overlay chapter, reads:

(1) Where wood or vinyl fencing is used, there shall be a minimum five-foot separation between the wood or vinyl fencing and the wall of the nearest structure except on those properties where previous construction occurred in compliance with a previous Code. Fencing within the five-foot separation area shall be of noncombustible material or modified one-hour fire-resistance-rated construction.

San Bernardino County Code section 82.13.050(j), enacted by Ordinance 4011 in 2007 and amended in 2008 and 2017; supplement 2026 S-45

Four things control how much that means for you. First, it is a development standard, not a maintenance duty: section 82.13.050 opens "Each proposed development shall comply with all applicable requirements of this Chapter, as follows." Second, it carries the express grandfather clause quoted above. Third, the 50 percent remodel trigger does not pull it onto an untouched house: section 82.13.050(d) requires any addition or alteration to comply with the Chapter, but the whole-structure retrofit it commands at the 50 percent threshold reaches only subsections (h), perimeter access, and (p), building construction. Fences, subsection (j), are not on that list. Fourth, the FS Overlay is mapped only in the unincorporated county, covering "areas within the mountains, valley foothills, and desert region designated by the applicable Fire Authority as wildfire risk areas."

Two neighboring provisions are also new-development-only: 82.13.050(n) requires decks "composed of noncombustible or ignition-resistant materials," and 82.13.050(p)(4) that "Gutters and downspouts shall be constructed of noncombustible material." Pricing fence materials against that standard means aluminum, steel, wrought iron, chain link, masonry, concrete and stone; our guide to noncombustible fence materials explains the test behind the word.

What the first five feet actually requires here today

Strip out the new-development code and what remains is vegetation and litter abatement, most of which never reaches five feet. County Code section 23.0301 works off PRC 4291 and requires a firebreak "for a distance of not less than 30 feet on each side of the building or structure or to the property line, whichever is nearer," plus a fuel break from 30 to 100 feet. Section 23.0304, the Mountain Area standard, keys ten categories of hazardous vegetation to 100, 30, 15 and 10 feet. Its tightest distance anywhere is ten feet, and neither section carries ember language or a fence provision. Running Springs Fire Department's Mountain Defensible Space Guidelines has exactly two columns, 15 feet and 100 feet, and the county district's Ready, Set, Go! flyer, dated November 2023, works in A, B, C and D zones rather than the Zone 0 framework.

Big Bear is the exception. Its Wildfire Defensible Space Compliance Checklist requires, "Within 0-5 ft. of a structure: abate pine needles, forest litter, dead vegetation, and mulches," with high-energy-release vegetation abated within 0 to 15 feet, and its Priority Defensible Space Requirements handout says the same for weeds, grasses and needles. So the first five feet must be cleared of needles, litter, dead vegetation, mulch, weeds and grass. Nothing there requires noncombustible ground cover, prohibits live plants, or mentions fences. Big Bear's fence line sits instead under the heading "Firewise Structure Hardening Recommendations" and reads "Replace wood fencing within 10' of structure with non-combustible type fencing." Advisory, and ten feet rather than five. The checklist is also a published compliance document rather than an ordinance; the enforceable instrument is the fire code, the scan we could not read.

What help exists, and what it will not pay for

Mountain assistance runs largely through Mountain Rim Fire Safe Council, which serves "the communities of Rim of the World area, Big Bear, Angelus Oaks, Forest Falls, Mountain Home Village, Devore Heights, Wrightwood, Lytle Creek and Waterman Canyon." Its abatement program answers notices to abate and may pay "5 to 100% of the cost of bringing the property into compliance, based upon household income and other information," subject to unpublished maximums. Involve the council before hiring anyone: "If you have the work done prior to MRFSC involvement there is no reimbursement." Its dead tree program contributes 10 to 100 percent for qualifying trees, and free curbside chipping has three deadlines left this season: August 30, September 13 and September 27.

The limits matter more. MRFSC states plainly that "Structural home hardening funding is not currently available." The California Wildfire Mitigation Program has no project area in San Bernardino County and rejects applications from outside its project areas. Big Bear Fire Department says it has no grant funds for weed abatement and routes residents to MRFSC. We found no county district homeowner grant on any page we loaded. The only Zone-0-labeled money here is a $15,000 award MRFSC received from the California Fire Foundation in November 2025 "for its Zone Zero Campaign", plus a "new grant for Zone Zero Demonstration sites and Home Assessments. More info will be available spring of 2026." No homeowner application, amount, eligibility rule or opening date is published anywhere we loaded, and that spring promise had not been followed up as of August 20, 2026.

Two things do cost nothing today: MRFSC's free home assessment, whose intake form submits despite a stale July banner, and the county district's Residential Assessment Program, promising "no charge or fees, and no punitive action taken." Our guide to who pays sets this in statewide context.

Who inspects, and what it costs to ignore them

Abatement runs through Land Use Services rather than the fire district, on an uneven cadence: "Valley & Desert Regions get two surveys per year during early spring and early fall," while "Mountain Regions receive one survey in the summer." Owners get 30 days. Citations start at $100 per violation, rise to $200 for a second within a year for the same offense, and reach $500 for third and subsequent violations, with a 100 percent penalty if payment is not received within 60 days; paying "does not relieve the responsibility to correct the violation(s)." For extensions and payments, 909-884-4056.

In the SRA, CAL FIRE runs the LE-100 program across roughly 35,000 mountain parcels, where "Non-compliance on 3rd inspection results in legal action (citation)." Big Bear inspects year-round across zip codes 92314, 92315 and 92386, and warns that "The notification letter is your warning. A notice of violation is not guaranteed to be issued in advance of a citation." An inspection on your own terms costs $95 in Big Bear; the county district's is $250 effective July 1, 2026, rising to $257 and then $264.

Claims we could not verify

• The contents of the two adopted fire codes. SBCoFD Ordinance FPD 23-01 is a 90-page image-only scan, and it is the one remaining place a local Zone 0 provision could sit. Big Bear Ordinance BBFA2023-001, the 2022 Fire Code adoption, is a scan too. Call SBCoFD at 909.386.8400 or Big Bear Fire at (909) 866-7566 before relying on either absence.
• Whether roughly nineteen unchecked cities and independent districts have Zone 0 ordinances, among them Apple Valley FPD, Chino Valley IFD, Rancho Cucamonga FPD, Redlands, Loma Linda, San Manuel FD and Arrowbear Lake FD. Our negative is verified for the county district, CAL FIRE's unit, Big Bear and Running Springs only.
• Whether City of San Bernardino Municipal Code section 15.10.030 still runs off a 2008 map. Search snippet only; the city code would not load.
• The gap between the two LRA acreage figures, 2,093,726 and 1,763,446. No source we loaded explains it.
• MRFSC's dollar caps, and which assistance range applies: its pages say 5 to 100 percent on the abatement and home assessment pages and 10 to 100 percent on the tree page. We report both rather than reconcile them.
• Whether MRFSC can obtain an extension on a County abatement notice. One page says it cannot and sends you to the County, then later says it can. Facing a 30-day notice, call 909-884-4056 yourself.
• Published homeowner terms for the Zone Zero campaign or the demonstration sites, the utilities' hazardous tree programs at Edison and Bear Valley Electric, and any county or regional community wildfire protection plan. None found, or not loaded.
• Whether the county or the district has said anything about the August 19, 2026 statewide adoption. Nothing on any page we loaded. What we are tracking statewide sits in our open questions log.

What this means for you

• Nothing we found in force here requires you to replace an existing wood fence. Not the county code, not Big Bear's checklist, not CAL FIRE's inspections. If a salesperson says otherwise, ask which section says so.
• Find out which track you are on first. SRA parcels answer to PRC 4291 at every hazard class; LRA parcels answer to Government Code 51182 only in mapped Very High zones. Use our address lookup, then confirm with the agency that actually inspects you.
• Clear the first five feet now, because that part is free. Needles, leaf litter, dead vegetation, mulch, weeds and grass. In Big Bear it is already required. Our self-assessment walks it and the checklist keeps score.
• Building in the unincorporated county? Section 82.13.050(j) is live at plan check, and decks, gutters and downspouts carry their own material requirements. Price it at design, not at inspection.
• Want the fence work anyway? Do it on your timetable. Read what the adopted state rule asks in our fence requirements guide and our explainer on the five-foot transition, and treat the insurance side as a credit rather than a requirement in fence insurance discounts.

How often CAL FIRE inspects here

CAL FIRE has 1,823 parcels in San Bernardino County in its defensible space inspection program in July 2026, the month the dashboard is currently reporting. Of the 1,812 inspected, 1,582 were compliant, which is 87 percent. 9 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 20, 2026.