Defensible space in Fallbrook: a homeowner's checklist

By Lawn Casa · Published November 11, 2026

The three zones

California law (Public Resources Code 4291) requires 100 feet of defensible space around buildings in wildfire-prone areas. The North County Fire Protection District, which serves Fallbrook, Bonsall and Rainbow, describes it in three parts. San Diego County's inner zone is wider than the state minimum: 50 feet rather than 30.

Checklist: the first 5 feet

• Nothing combustible against the house: no stacked wood, no stored lumber, no dry plants.
• Dead leaves and needles cleared from the roof and gutters.
• Bark mulch next to the walls swapped for gravel or stone.
• Branches that hang over the roof removed, and kept 10 feet back from any chimney.

Checklist: out to 50 feet

• All dead plants, dry grass and weeds removed.
• Dead leaves and needles cleared from the ground and from under trees.
• Dead limbs trimmed off trees.
• Trees pruned so their branches are at least 10 feet from other trees.
• Firewood stacked at least 30 feet from every structure and fence.
• 10 feet of clearance around propane tanks.
• Plants, shrubs and trees staggered so fire cannot run from one to the next.

Checklist: 50 to 100 feet

• Annual grass cut to a maximum of 4 inches.
• Space between shrubs: at least twice their height on flat ground, and more as the slope steepens.
• Lowest tree branches at least 6 feet off the ground.
• Fallen leaves, needles and twigs thinned out. A layer up to 3 inches deep may stay.
• Your address posted where it can be seen from the road at the end of the driveway.

The spacing and height figures are from CAL FIRE's defensible space guide, which has diagrams for sloped ground. The firewood, propane and address items are from the North County Fire page linked above.

When to do it

Cut in spring, after the rain stops and before the grass dries to straw. That is easier work, and it puts you ahead of inspection season. Check again in late summer: regrowth is usually light, and a second pass takes a fraction of the time. Fall is when the Santa Ana winds arrive, so the yard should be in its best shape by September.

If you get a notice

North County Fire sends a Notice to Abate Hazard when a property needs clearing. The notice says what to do and by when. According to the district's weed abatement page, reinspection fees apply if the instructions are not followed, and a forced abatement can take 60 to 90 days. Questions about a notice go to the Fire Prevention Bureau at (760) 723-2010.

Doing it yourself, safely

Clearing dry grass is itself a common way to start a fire. Cut early in the day, before the heat and wind build. Do not cut at all on red flag warning days. Use a string trimmer rather than a mower or a metal blade in dry grass, because steel striking rock throws sparks. Keep water and a shovel within reach.

Cut the grass short, but leave the roots. A slope scraped to bare dirt will wash out in the first heavy rain.

What it costs to have it done

Lawn Casa prices weed abatement by the ground cleared.

A typical job is a quarter to a half acre around a house. See weed abatement for what is included, or send us the address and a few photos.

Fire rules are updated from time to time, and the requirements for the first 5 feet in particular are changing statewide. This page was last checked against the linked agency pages in November 2026. Your fire district has the final word for your address.