Fire Safety – Defensible Space – Is Your Home Prepared? – Shared Article

Hello Readers – I wanted to share that effective December 2025 – California homeowners need to think ahead about fire safety.

Defensible Space is crucial for your home’s wildfire safety. It’s the buffer zone you create between your property and the surrounding wildland area. This space is key to slowing or stopping wildfire spread and protecting your home from embers, flames, or heat. It also gives firefighters a safer area to defend your property.

Need a Fire Defensible Space Inspection – Click HERE

I read this article HERE. By Cal-Fire

Zone 0: Start Closest to Your Home to be Ember-Resistant

The first five feet from your home is the most important. Keeping the area closest to buildings, structures, and decks clear will prevent embers from igniting materials that can spread the fire to your home.

Why? Learn more about the importance of Zone 0 and the scientific research that demonstrates the importance of this zone with the (Zone 0 At-A-Glance

What to do:

  1. Use hardscape like gravel, pavers, or concrete. No combustible bark or mulch.
  2. Remove all dead and dying plants, weeds, and debris (leaves, needles, etc.) from your roof, gutter, deck, porch, stairways, and under any areas of your home.
  3. Remove all branches within 10 feet of any chimney or stovepipe outlet.
  4. Limit combustible items (like outdoor furniture and planters) on top of decks.
  5. Relocate firewood and lumber to Zone 2.
  6. Replace combustible fencing, gates, and arbors attached to the home with noncombustible alternatives.
  7. Consider relocating garbage and recycling containers outside this zone.

Consider relocating boats, RVs, vehicles, and other combustible items outside this zone.

Zone 1: Keep it Lean, Clean and Green Within 30 feet

Regularly clear dead or dry vegetation and create space between trees. During times of drought when watering is limited, pay special attention to clearing dead or dying material.  

Why? Removing dead plants and creating space between trees and shrubs creates a buffer for your property and reduces potential fuel for fire.  

What to do:

  1. Remove all dead plants, grass, and weeds.
  2. Remove dead or dry leaves and pine needles.
  3. Trim trees regularly to keep branches a minimum of 10 feet from other trees.

Create a separation between trees, shrubs, and items that could catch fire, such as patio furniture, wood piles, swing sets, etc.

Zone 2: Reduce Potential Fuel Within 100 Feet

Continue reducing potential fuel within 100 feet or the property line.

Why? 100 feet of defensible space is required by law. Public Resources Code (PRC) 4291

What to do:

  1. Cut or mow annual grass down to a maximum height of four inches.
  2. Create horizontal space between shrubs and trees. (See diagram)
  3. Create vertical space between grass, shrubs and trees. (See diagram)
  4. Remove fallen leaves, needles, twigs, bark, cones, and small branches. However, they may be permitted to a depth of three inches.
  5. Keep 10 feet of clearance around exposed wood piles, down to bare mineral soil, in all directions.
  6. Clear areas around outbuildings and propane tanks. Keep 10 feet of clearance to bare mineral soil and no flammable vegetation for an additional 10 feet around their exterior.

How to Space Trees and Shrubs

Vertical Spacing

Maintain space between the lowest tree branches and the ground or shrubs.

  • Remove all tree branches at least six feet from the ground.
  • Allow extra vertical space between shrubs and trees. Lack of vertical space can allow a fire to move from the ground to the brush to the treetops like a ladder. This leads to more intense fire closer to your home.
  • Keep at least three times the height of any shrubs between the shrubs and the lowest branches of trees.
  • Example: A 5-foot shrub is growing near a tree. 15 feet of clearance is needed between the top of the shrub and the lowest tree branch.
vertical space

Horizontal Spacing

How much space should you leave between trees or shrubs?              

Horizontal space depends on the slope of the land and the height of the shrubs or trees. Leave more space between vegetation on bigger slopes. Refer to the chart below to determine spacing distance.

Graphic demonstrating the space between shrubs and trees at different slopes

Space between shrubs:

  • Flat or mild slope (less than 20%): Two times the height of the shrub.
  • Mild to moderate slope (20-40%): Four times the height of the shrub
  • Moderate to steep slope (greater than 40%): Six times the height of the shrub

Space between trees:

  • Flat or mild slope (less than 20%): 10 feet.
  • Mild to moderate slope (20-40%): 20 feet.
  • Moderate to steep slope (greater than 40%): 30 feet.

Tips For Clearing in Dry Conditions

  • Mow before 10 a.m. and never on a hot or windy day.
  • String trimmers are safer than lawnmowers for clearing vegetation.
  • When watering less during times of drought, be sure to remove all dead or dying vegetation.

California has diverse regional climates, and some local government agencies have stricter standards that the State’s minimum requirements. For example, San Diego County requires 50 feet of clearance in Zone 1. Check with your local fire department or fire protection district for defensible space or weed abatement requirements.

LINKS FOR MORE INFORMATION:

San Mateo County

Santa Clara County

San Francisco County

California County Guides

Defensible Space Inspection Dashboard

Need a Fire Defensible Space Inspection – Click HERE

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Sabrina & Susan are native Californians - born and raised in the Silicon Valley with a passion for Residential Real Estate. A mother and daughter-in-law duo called - The Caton Team. With over 35 years of combined, local Real Estate experience and knowledge – would’t you like The Caton Team to represent you? Let us know how we can be of service. Contact us any time. Call | Text at: 650-799-4333 | Email Info@TheCatonTeam.com The Caton Team believes, in order to be successful in the San Fransisco | Peninsula | Bay Area | Silicon Valley Real Estate Market we have to think and act differently. We do this by positioning our clients in the strongest light, representing them with the utmost integrity, while strategically maneuvering through negotiations and contracts. Together we make dreams come true. The Peninsula is our backyard - let us help make it yours. We represent Buyer’s and Seller’s throughout the Bay Area. The Caton Team – Susan & Sabrina A Family of Realtors Effective. Efficient. Responsive. What can we do for you?

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