California's existing defensible space framework—Zone 1 (0–30 feet) and Zone 2 (30–100 feet)—was designed primarily to slow direct flame spread and give firefighters room to stage. What it did not address was the threat most responsible for modern structure loss: wind-driven embers. Data consistently shows that the majority of homes lost in California wildfires are ignited not by direct flame contact, but by firebrands that can travel miles ahead of a fire front.

In response, the Legislature enacted Assembly Bill 3074 (AB 3074) in 2020, directing the State Board of Forestry and Fire Protection to create a third zone (“Zone 0”) covering the first five feet around any structure, attached deck, or stairway. Zone 0 applies to all properties in the State Responsibility Area and in “very high” fire hazard severity zones of Local Responsibility Areas. The City of San Diego has stated that compliance with Zone 0 is required for all new structures built in Very High Fire Severity Zones after February 28, 2026, with existing owners expected to comply by February 2027.

Within the five-foot perimeter, the core obligation is removing combustible materials: dead vegetation, dry leaves and pine needles, wood-based mulch, dry grass, synthetic turf, stored lumber, and combustible fencing, gates, and arbors. Preferred ground cover is hardscape: concrete, gravel, pavement, or bare soil. Trees are permitted if properly maintained, with no dead branches, healthy branches kept at least five feet from roofs and walls, and canopies at least ten feet from structures at maturity. Combustible outdoor furniture on decks should be limited, and garbage containers, RVs, and vehicles should ideally be relocated outside the zone.

Of all Zone 0 requirements, fencing is the most significant for community associations. Wood fencing or gates attached to or running within five feet of a structure act as a “wick.” If ignited by an ember, a connected wood fence can carry fire directly to the building's siding. Zone 0 requires replacing combustible fencing, gates, and arbors within five feet of any structure with noncombustible alternatives such as aluminum, steel, wrought iron, masonry, or approved composite materials.

For community associations, the critical first question is: who owns the fencing? Where fencing is association-maintained common area or exclusive use common area, replacement costs fall to the association. Where fencing is owner-maintained, the association may still have coordination and architectural control obligations. Governing documents should be reviewed and amended where necessary to authorize noncombustible materials within Zone 0 and to avoid inadvertently blocking owner compliance through outdated architectural standards.

Zone 0 compliance will require capital expenditure that most current operating budgets do not contemplate. Fencing replacement at community scale, removal and replacement of wood-based mulch across common areas, tree maintenance, and vegetation modifications can add up quickly—particularly for communities with canyon-adjacent units or extensive common area landscaping.

The most prudent first step is a Zone 0 compliance audit: a systematic inventory of all association-maintained elements that fall within five feet of any structure, with prioritized remediation recommendations and cost estimates. That audit can then inform the reserve study update and annual budget process. For costs that exceed what reserves can absorb, California law provides several tools: a special assessment under Civil Code Section 5600, a board-authorized line of credit, or a member-approved assessment for larger expenditures. Phasing the work over the compliance period by starting with highest-risk fencing and mulch, then addressing broader landscaping distributes costs and allows competitive bidding.

Associations should also consult their insurance broker. California's Department of Insurance “Safer from Wildfire” program identifies Zone 0 as a critical action, and some insurers are already factoring defensible space compliance into underwriting decisions. Proactive compliance may meaningfully affect coverage availability and premium costs in an already difficult market for fire-zone communities.

Zone 0 represents the most significant change to California's wildfire defensible space requirements in nearly two decades. For community associations, the practical obligations span common area fencing replacement, mulch and vegetation management, governing document review, architectural guideline revision, and capital planning; all on a defined and approaching timeline.

Associations that begin auditing, planning, and budgeting now have the most options. Those that wait will face compressed timelines, higher contractor costs, and fewer financing alternatives. The fire seasons of the past decade have demonstrated, at devastating cost, that the risk is real. Zone 0 is a science-driven response, and proactive associations have an opportunity to lead their communities toward greater resilience.

WE CAN HELP

Navigating Zone 0, particularly where it intersects with governing documents, common area ownership, architectural control, and assessment authority—requires careful legal analysis. Our firm regularly advises homeowners associations and condominium communities on wildfire preparedness, governing document interpretation, and enforcement strategy. If you have questions about how Zone 0 affects your community, whether your CC&Rs provide adequate authority, or how to structure a special assessment for compliance work, we are happy to help. Give us a call.