County guide

Zone 0 in Santa Clara County: four cities adopted the wildland code, none adopted the zone

Fact-checked August 19, 2026·Sources at the end of this article

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

The usual county-guide shape applies here: a statewide rule that is adopted and not yet in effect, and local rules that either exist or do not. In Santa Clara County they do not. As of August 23, 2026 we could find no Zone 0 or ember-resistant-zone requirement in force in any jurisdiction we could read, and we read the big ones from their codified text rather than their press pages.

The county's own fire code, Division B7 of the county ordinance code, was repealed and reenacted in its entirety on December 9, 2025. We read all of it. It is a modern fire code adoption concerned with sprinklers and access: its wildfire content amounts to sprinkler thresholds that tighten inside a Wildland-Urban Interface Area, down to 500 square feet of fire area for new buildings there against 1,200 square feet elsewhere. There is no defensible-space standard of the county's own, no five-foot band, and no fence provision.

Adopted, not yet in effect: the statewide regulation, the instrument that would carry fence and gate rules into this county once it takes effect. 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 covers the phase-in, and the register lists the eighteen jurisdictions statewide that do have Zone 0 rules in force. None is in Santa Clara County.

Where the statewide rule will reach in this county

The regulation runs on two legal tracks. In the State Responsibility Area (SRA), the wildland east and south of the valley floor and the Santa Cruz Mountains side to the west, it covers every hazard class under Public Resources Code section 4291. In the Local Responsibility Area, the cities, it covers only mapped Very High Fire Hazard Severity Zones under Government Code section 51182. The Very High pockets sit where you would expect them: the hill neighborhoods of San Jose, Los Gatos, Saratoga, Monte Sereno and Los Altos Hills, along the interface with the mountains. Start with our address lookup walkthrough to see which track, if either, your parcel is on.

What the cities actually adopted in late 2025, and what they did not

Four cities adopted the 2025 California Wildland-Urban Interface Code within six weeks of each other: Saratoga by Ordinance 414 on November 5, Monte Sereno by Ordinance NS-248 on November 18, San Jose by Ordinance 31258 the same day, and Los Gatos by Ordinance 2380 on December 2. We read each adoption from the codified text. None of the four adds an ember-resistant zone, a five-foot materials rule, or any fence provision.

What two of them did add is reach. The model code's Section 604.2 says where hazardous vegetation and fuel management applies. San Jose amended it, and separately redefined its Wildland-Urban Interface Area to include "all moderate, high and very high fire hazard severity zones" plus additional city-designated areas on a map filed with the fire department. Monte Sereno amended the same section to reach Moderate, High and Very High zones alike. Santa Monica, four hundred miles away, made the same amendment in October. Three cities, one section, zero new substantive requirements: they broadened where fuel rules apply while adding nothing about what the first five feet must be made of.

The consequence arrives with the statewide rule. A San Jose homeowner in a Moderate zone who reads the state regulation would conclude Zone 0 does not reach them, because the state's Local Responsibility Area trigger is Very High only. Their own city code may say otherwise once the state text is effective, because the city has defined its interface more broadly than the state defined its trigger. That interaction is on our county survey as a statewide pattern, and this county is where most of the affected parcels are.

Los Altos Hills, still running its 1965 rules

The town with the county's highest fire exposure per parcel regulates it with an ordinance from 1965: Article 1 of its hazardous fire areas title requires spark arresters on chimneys within 200 feet of hazardous fire areas, governs ash and coal disposal, and keeps firewood stored at least 30 feet from structures. It is careful, dated law, and it contains no five-foot band and no fence materials rule. The town's defensible-space enforcement runs on state law through its fire arrangements, not on a local Zone 0 ordinance.

Elsewhere: Morgan Hill's fence provisions govern trailer parks and junkyards. Saratoga's and Los Gatos's fire codes, read in full, are sprinkler and access codes. If someone tells you any of these cities requires a noncombustible fence today, ask for the section number, because we looked and there is not one.

Claims we could not verify

• Whether any unchecked city has a Zone 0 rule. Gilroy, Cupertino, Palo Alto, Campbell, Los Altos, Milpitas, Sunnyvale, Mountain View and the city of Santa Clara were not individually read; Palo Alto's code publisher blocks every tool we have. Given that this county produced the 604.2 pattern, we would not guess what any of them says.
• The fire districts' own ordinances. The Santa Clara County Central Fire Protection District, South Santa Clara County Fire District and Los Altos Hills County Fire District hold independent ordinance authority under state law, and we have not read their board-adopted rules. District ordinances are exactly where local Zone 0 rules hide elsewhere in the state.
• Local hazard-map adoptions. We did not verify which cities have adopted the 2025 Fire Hazard Severity Zone maps by ordinance, and coverage of the statewide rule turns on those maps in the Local Responsibility Area.

What this means for you

• Do not buy a fence because you think Santa Clara County requires one. Nothing we could find in force here does. The statewide rule's fence provision, once effective, asks for a five-foot noncombustible span where a fence attaches to the house, not a new fence; our fence requirements guide has the adopted text.
• If you are in a San Jose or Monte Sereno hill zone mapped Moderate or High, watch the interaction between your city's interface designation and the state rule's arrival. That is the one place in this county where the honest answer today is "broader than the state text suggests."
• Check your track now, while nothing is due. Check your address against CAL FIRE's own layers, then walk the first five feet with our self-assessment, which also tells you what you do not need to buy.

How often CAL FIRE inspects here

CAL FIRE has 379 parcels in Santa Clara County in its defensible space inspection program in July 2026, the month the dashboard is currently reporting. Of the 347 inspected, 344 were compliant, which is 99 percent. 1 property has 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.

Not the county you were looking for? See every jurisdiction we can prove has a rule in force, and ask us to add yours.