How Zone 0 Can Protect Your Home from Wildfires – A Guide by an Architect
How Zone 0 Can Protect Your Home from Wildfires
In California’s fire-prone areas, particularly within the Wildland-Urban Interface (WUI), recent regulations focus on creating an “ember-resistant zone” within the first five feet surrounding structures, known as “Zone 0.” This zone is critical in preventing wind-driven embers from igniting materials near homes, a common cause of wildfire-related property loss.
Current Guidelines for Zone 0:
• Vegetation: It’s recommended to avoid planting any vegetation within the first five feet of a structure. This reduces the risk of embers igniting plants and subsequently the home.
• Ground Cover: Use non-combustible materials such as gravel, pavers, or concrete for landscaping near the home. Combustible mulches or bark should be avoided in this area.
• Combustible Items: Keep this zone clear of combustible materials, including wooden furniture, planters, and storage items like firewood or lumber.
Regulatory Developments:
In February 2025, Governor Gavin Newsom issued Executive Order N-18-25, directing the California Board of Forestry and Fire Protection to expedite the adoption of regulations establishing the 0-5 foot ember-resistant zone. These regulations aim to enhance wildfire resilience by minimizing flammable materials near structures.
Local Implementation:
While state regulations are being finalized, some local jurisdictions have proactively adopted similar measures. For example, South Lake Tahoe has implemented requirements for both new and existing properties to maintain an ember-resistant zone within five feet of structures.
Although the specific regulations are still under development, the prevailing guidance advises minimizing or eliminating combustible materials, including vegetation, within the first five feet of structures in fire-prone areas. Homeowners are encouraged to use non-combustible materials for landscaping in this zone to enhance fire resistance. For the most current and applicable regulations, it’s advisable to consult local fire authorities or building departments, as local ordinances may have already implemented these recommendations.
