The Twilight Zone? Not Quite — Welcome to “Zone 0”

In 2020, California passed Assembly Bill 3074, requiring the establishment of an “ember-resistant zone”—known as Zone 0—within five feet of structures located in designated high fire hazard areas. The goal? To reduce the risk of homes igniting from wind-driven embers, one of the leading causes of wildfire-related structural loss.

Although the law passed several years ago, implementation has moved slowly. Originally slated to take effect in 2023, the regulations are still awaiting final approval, leaving many homeowners unsure of what is expected of them. To accelerate progress, Governor Gavin Newsom issued Executive Order N-18-25 in February 2025, directing the State Board of Forestry and Fire Protection to finalize Zone 0 regulations by the end of 2025.

Key Aspects of Zone 0

Scope:
Zone 0 covers the first five feet surrounding a structure, including attached decks, stairways, and other connected features.

Requirements:
Proposed regulations will likely restrict combustible materials—such as wood fencing, mulch, and flammable vegetation—from this area. Some exceptions may apply, including certain non-combustible items and well-maintained mature trees.

Applicability:
Once adopted, Zone 0 rules will apply immediately to new construction within State Responsibility Areas and Very High Fire Hazard Severity Zones. Existing homes will have three years to come into compliance.

Collaboration and Support

Developing Zone 0 regulations is a collaborative effort involving CAL FIRE, the Office of the State Fire Marshal, local governments, and community groups. This collaboration helps ensure the rules are practical, equitable, and reflective of the diverse landscapes and communities across California.

Addressing Homeowner Concerns

Many homeowners worry about the potential costs and visual impacts associated with removing or replacing materials in Zone 0. In response, the state is considering financial assistance programs and public education initiatives to help ease the transition and highlight the life-safety benefits of these changes.

Our Perspective

Through our engagement with HOA/POA groups, CAL FIRE, CalOES, and local fire departments, we’ve seen firsthand the confusion surrounding Zone 0—especially when applying a single concept to environments that vary drastically. Rural properties and dense urban neighborhoods face very different challenges. The regulations should acknowledge these differences for existing homes, while new construction can more easily follow a standardized set of requirements.

Looking Ahead

As wildfire threats continue to grow, Zone 0 represents an important step toward increasing community resilience and protecting California homes. We encourage homeowners to stay informed as the regulations move toward final adoption and begin planning now for how Zone 0 requirements may affect their property.

For updates and the latest information on Zone 0, visit the CAL FIRE website.