California’s Board of Forestry and Fire Protection has approved the state’s first Zone 0 defensible space regulations, establishing a statewide baseline for the ember-resistant area within five feet of a structure. The rules apply to properties in State Responsibility Areas and Very High Fire Hazard Severity Zones, which cover roughly 3.7 million residents across 3,626 square miles, according to a CalMatters analysis of CAL FIRE mapping data.
But the insurance industry’s initial response signals that meeting the new standard may not, on its own, lead to changes in coverage availability or pricing for homeowners in wildfire-prone areas.
The American Property Casualty Insurance Association (APCIA), the primary national trade association for home, auto, and business insurers, said it supports the state’s progress but raised concerns about what compliance will mean in practice. Mark Sektnan, APCIA vice president of state government relations, said in a statement that the revised proposal “includes positive improvements, but important concerns remain about whether compliance will represent a sufficiently consistent and verifiable level of mitigation across properties and communities.”
The concern is rooted in how California’s Zone 0 standard accommodates local variation in enforcement and timelines, which could make it difficult for carriers to treat compliance as a reliable underwriting factor.
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Zone 0 covers the area from a structure’s exterior walls out to five feet, or to the property line if closer. Property owners must clear combustible mulch, wood chips, dead vegetation, and stored firewood from this area. Roofs and gutters must be kept clear of debris. Combustible fencing attached to a structure must include a five-foot noncombustible section, and outbuildings within Zone 0 must have noncombustible exterior walls and roofs.
New construction must comply once the Board of Forestry updates its fuels-management guidance, according to a legal analysis by Best Best & Krieger LLP. Existing homes have a phased timeline: three years to remove combustible materials and maintain vegetation, and up to five years for local jurisdictions to set deadlines for safety zones beneath eaves and changes to fencing and outbuildings.
Local fire agencies in Local Responsibility Areas can also adopt alternative practices, provided they are supported by a written finding that the alternatives deliver substantially similar fire safety benefits.
The APCIA’s concern is that different vegetation conditions, temporary exceptions, locally approved alternatives, and staggered compliance timelines can all produce the same “Zone 0 compliant” designation.
“From an insurance perspective, that consistency matters. If different vegetation conditions, temporary exceptions, local alternatives, and implementation timelines can all fall under the same ‘Zone 0 compliant’ designation, it becomes more difficult to determine and quantify the actual risk reduction associated with compliance,” Sektnan said.
For brokers placing homeowners coverage in wildfire-exposed areas, the practical question is whether carriers will treat Zone 0 compliance as a factor in underwriting or pricing. Without a consistent and verifiable level of risk reduction behind the label, carriers have less basis to adjust their approach. As reporting from Insurance Business has shown, California brokers are already contending with a market where individual property-level mitigation carries less weight in pricing decisions.
Sektnan said that if the public is led to believe that compliance provides a level of protection “that the standard does not consistently deliver, it risks creating a false sense of security and, over time, undermining consumer and policymaker confidence in mitigation efforts more broadly.”
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The regulations arrive as California’s homeowners insurance market remains under pressure. The California FAIR Plan held 698,307 policies as of September 2026, with total exposure reaching $773 billion, an increase of 252% since September 2022, according to the plan’s published statistics.
California homeowners insurers posted a 169.6% loss ratio in 2025, compared with 55.1% nationally, based on data from the National Association of Insurance Commissioners (NAIC). The state accounted for roughly 28% of all US homeowners losses despite representing about 9.2% of earned premium.
The APCIA urged local jurisdictions and homeowners to treat the regulation as a floor, not a ceiling. “Consistent with wildfire science, local governments and homeowners should go further than the regulation and implement a noncombustible zone in the five feet around homes to truly protect their communities,” Sektnan said.
Whether that recommendation gains traction with local governments and property owners may determine how quickly Zone 0 compliance becomes something carriers can incorporate into wildfire underwriting.
