Defensible space is the area around a building you keep clear of things that can burn. That space can slow or stop a wildfire from getting to your home or other buildings.

The County has requirements for defensible space around property in the unincorporated area. Each fire district also has its own rules. All the requirements are in the County of San Diego 2023 Consolidated Fire Code.

Basic rules

These are a few of the requirements. The distance from the building is divided into zones. Each zone has its own rules.  

Zone 0

From your wall, porch, patio or deck to 5 feet.

  • Have hardscape, like concrete or bricks.
  • Nothing that can burn.
  • No firewood.

Zone 1

From 5 feet to 50 feet.

  • Low-growth, fire-resistant plants. See plants for defensible space (PDF).
  • Plants must be irrigated.
  • Firewood must be 30 feet from buildings, 10 feet from property lines.
  • No dead or dying plants. Includes grasses and fallen leaves.

Zone 2

From 50 to 100 feet.

  • Medium height, fire-resistant plants.
  • Lowest branches cut to top 1/3 of tree.

No dead or dying plants. Grasses cut to 4 inches.

Graphic showing the three zones around a building and examples of what should go in each zone.

Help and resources

You may be able to get help if you cannot create defensible space yourself.

Page last updated 09/28/2025