In 2023, California implemented new defensible space rules for homes in high fire risk areas. The state has recently added some stricter regulations in these high fire hazard severity regions, including a 5-foot “ember-resistant zone” around homes (“Zone Zero”). These regulations aim to limit vegetation and other flammable materials within that zone. The rules apply to new construction starting in 2025 and to existing structures beginning in 2026; however, the implementation for existing structures may be phased in over three years.
So, if you’re thinking about redoing your landscaping, replacing your fences, or adding a wood deck, you should check https://osfm.fire.ca.gov/ to determine if you live in a high fire zone before proceeding.
The new Zone Zero rules require removing all flammable materials, such as flowers, brush, wooden fencing, wooden furniture, wood sheds, or mulch within 5 feet of a house. Additionally, combustible materials like leaves and debris must be cleared from roofs, gutters, and decks.
There may be conflicts between these regulations and heritage tree protection ordinances, and it’s unclear how this will be resolved across different communities. Rules specify that tree branches should be at least 10 feet away from chimneys and stovepipes, no branches should overhang roofs, and no branches should be within 5 feet of a building. Many of our oak and redwood trees do not meet these requirements.
Even if your property is not in a high fire zone, it’s worth checking whether your insurance carrier will require you to comply with the new rules to maintain your current home insurance policy.
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