In 2020, California enacted Assembly Bill 3074, mandating the creation of an “ember-resistant zone”—referred to as “Zone 0”—within five feet of structures in designated high fire hazard areas. This initiative aims to reduce the risk of homes igniting from wind-driven embers during wildfires, a leading cause of structural fires.

Despite the law’s passage, implementation has faced delays. Originally set to take effect in 2023, the regulations have not been finalized, leaving many homeowners uncertain about compliance requirements. In response, Governor Gavin Newsom issued Executive Order N-18-25 in February 2025, directing the State Board of Forestry and Fire Protection to expedite the adoption of Zone 0 regulations. The goal is to have these regulations in place by the end of 2025.  

Key Aspects of Zone 0:

• Scope: Zone 0 encompasses the area within five feet of a structure, including attached decks and stairs. 
• Requirements: The regulations will likely prohibit combustible materials such as wooden fences, mulch, and flammable vegetation within this zone. Exceptions may include certain non-combustible items and well-maintained mature trees.
• Applicability: Once finalized, the rules will apply immediately to new constructions in State Responsibility Areas and Very High Fire Hazard Severity Zones. Existing structures will have a three-year period to achieve compliance.  

Collaboration and Support:

The development of Zone 0 regulations involves collaboration among various stakeholders, including CAL FIRE, the Office of the State Fire Marshal, local governments, and community organizations. This collaborative approach ensures that the regulations are practical and consider the diverse needs of California’s communities.

Addressing Concerns:

Some homeowners have expressed concerns about the potential costs and aesthetic impacts of complying with Zone 0 requirements. To address these concerns, the state is considering financial assistance programs and educational initiatives to help homeowners understand the importance of these measures in protecting their properties.  

Moving Forward:

As California continues to face increasing wildfire threats, the implementation of Zone 0 regulations represents a proactive step toward enhancing community resilience. Homeowners are encouraged to stay informed about the forthcoming regulations and to begin considering how they can adapt their properties to meet the new standards.

For more information and updates on Zone 0 regulations, homeowners can visit the CAL FIRE website or contact our team at MySafe:Riverside.