Defensible space is the buffer of managed vegetation around a home that gives the structure a chance to survive a wildfire and gives firefighters room to work. In the El Dorado County foothills it is required by law, and it is where tree decisions and fire decisions become the same decision. I am Christopher Hodge, an ISA Board Certified Master Arborist, and I assess which trees on a property are genuine hazards and which are sound, so you can meet defensible space requirements without clear cutting the canopy that makes your property worth living on. Independent consulting arborist, no removal crews, no incentive to take down more than you need.
What is defensible space?
Defensible space is the treated area between a structure and the wildland fuels around it. California Public Resources Code section 4291 requires 100 feet of defensible space around homes in fire prone areas, or out to the property line if it is closer. The goal is not a moonscape. It is to break up the fuel so a fire drops out of the tree crowns to the ground, slows down, and can be stopped before it reaches the house.
The defensible space zones
The 100 feet is managed as zones, with the most intense treatment closest to the structure:
- Zone 0, the ember resistant zone, is the first 5 feet around the house. Keep it as free of flammable material as possible, including bark mulch, dead leaves and needles, and limbs that overhang the roof.
- Zone 1 runs from 0 to 30 feet. Remove dead plants and fuel, keep tree limbs well clear of the roof and chimney, and space trees so their crowns do not touch.
- Zone 2 runs from 30 to 100 feet. Reduce and space the fuels, limb up trees, and clear dead wood, while keeping healthy, well spaced trees in place.
Zone 0 requirements are being phased in under California's newer defensible space rules, so confirm the current standards with CAL FIRE and your local fire district before you plan work.
Defensible space is a tree decision, not a clear cut
The most common mistake is thinking defensible space means removing every tree. It does not. Healthy, well spaced trees with their lower limbs pruned and their dead wood removed can stay, and a mature, open canopy can even slow a wind driven fire. What has to go is the ladder fuel and the dead or hazardous trees that carry fire up into the crowns or fail during a fire. I assess each tree on the property, tell you which ones genuinely need to come down and which are sound, and lay out the spacing and pruning that meets the requirement while keeping the trees you value.
After a fire, which trees will live?
After a burn, some scorched trees recover and others become hazards as the damage develops over the next few seasons. I evaluate the cambium, the roots, and the structure and give you a written assessment of which fire damaged trees are likely to survive and which pose a risk, so you are not removing trees that would have lived or keeping ones that will fail.
Frequently Asked Questions
How much defensible space do I need in El Dorado County?
State law requires 100 feet of defensible space around homes in fire prone areas, or out to your property line if it is closer, under California Public Resources Code section 4291. Most of the El Dorado County foothills fall in that category. The 100 feet is treated in zones, with the most work closest to the house.
Do I have to cut down all my trees for defensible space?
No. Defensible space is about spacing, pruning, and removing dead fuel and genuinely hazardous trees, not clearing every tree. Healthy, well spaced, limbed up trees can stay and can even help. I assess which trees are hazards and which are sound, so you keep the canopy you can while still meeting the requirement.
Can you assess fire damaged trees after a wildfire?
Yes. I evaluate scorched trees for their likelihood of survival and for the hazards that develop in the seasons after a fire, and I provide a written assessment you can act on. Call or text (530) 391-6100.
Sources
- California Public Resources Code section 4291 and CAL FIRE defensible space guidance (readyforwildfire.org). Confirm current zone requirements, including the ember resistant Zone 0, with CAL FIRE and your local fire district.