California Public Resources Code 4291: Zones, Fines, and Liability

California’s defensible space law requires anyone who owns a building in a designated fire hazard zone to clear and manage vegetation for 100 feet around every structure, broken into three zones with the strictest rules closest to the walls.¹ A first violation is an infraction with a fine of $100 to $500; a third within five years is a misdemeanor.² The bigger risks sit outside the penalty schedule: civil liability if fire spreads from your property, disclosure obligations when you sell, and insurance carriers that increasingly treat compliance as a condition of coverage.

Who Has to Comply

Two statutes carry the requirement, and between them they cover almost every fire-prone property in the state. Public Resources Code 4291 applies to buildings in the State Responsibility Area, the wildland and rural land where CAL FIRE has primary firefighting responsibility.¹ Government Code 51182 imposes nearly identical rules on occupied structures in Very High Fire Hazard Severity Zones inside Local Responsibility Areas, meaning cities and counties served by local fire departments.³

The Office of the State Fire Marshal maps Fire Hazard Severity Zones at three levels: moderate, high, and very high. Updated SRA maps took effect in April 2024, and revised LRA maps rolled out between February and March 2025.⁴ To find out whether your property is inside a designated zone, enter your address in the OSFM’s online FHSZ viewer. If it is, everything below applies to you.

The Three Zones Around Your Home

The 100-foot perimeter is split into three zones. Older guides describe only two, but Assembly Bill 3074 added Zone 0, an ember-resistant zone within 5 feet of the structure, because most homes lost in wildfire ignite from windblown embers rather than direct flame.⁵

Zone 0 (0 to 5 feet): The ember-resistant zone, including the area under attached decks. Remove all combustible materials, vegetation, and debris. Use gravel, concrete, or bare soil in place of bark mulch or wood chips.⁶
Zone 1 (5 to 30 feet): The “Lean, Clean, and Green” zone. Clear dead vegetation, fallen leaves, pine needles, and flammable debris. Prune trees and shrubs and space them so fire cannot climb or jump between plants.
Zone 2 (30 to 100 feet): The fuel reduction zone. Thin vegetation to create horizontal and vertical spacing that slows fire spread.

You are not required to manage fuels beyond your property line. If your lot is smaller than 100 feet in any direction, your obligation stops at the boundary, and any work on a neighbor’s land requires their written consent.¹

What Inspectors Actually Check

The Board of Forestry and Fire Protection’s regulations spell out the measurements behind the zones. Within 30 feet of a structure, you must remove all dead or dying grass, plants, shrubs, trees, and branches, whether in the yard, on the roof, or in rain gutters. Dead branches overhanging the roof, near windows, or touching walls have to be cut back, and tree branches must stay at least 10 feet from chimney and stovepipe outlets.⁷ Firewood stacked inside Zone 1 has to be moved out or fully covered with fire-resistant material. Flammable items stored under combustible decks, balconies, or stairs must be removed. CAL FIRE also recommends trimming the lowest tree branches to at least 6 feet above ground to keep ground fire from climbing into the canopy.⁸

Between 30 and 100 feet, the goal is spacing. Dead and dying woody fuels must be removed, though a thin layer of fallen leaves and needles up to 3 inches deep is permitted. Annual grasses and weeds must be cut to no more than 4 inches. Firewood piles left exposed in this zone need 10 feet of clearance down to bare mineral soil in every direction.⁷ The regulations allow two spacing approaches: creating gaps between individual plants and canopies, or keeping a connected canopy but stripping out the undergrowth and ladder fuels beneath it. Most properties use both.

CAL FIRE inspects properties in the SRA, and local fire departments inspect in LRA zones. Most inspections happen during fire season. If your property fails, you get a written notice listing the deficiencies and a deadline to fix them, followed by a reinspection.⁹

Fines, Misdemeanors, and Liens

The penalty ladder is set in statute. A first violation is an infraction with a fine of $100 to $500. A second violation within five years brings a fine of $250 to $500. A third within five years becomes a misdemeanor with a minimum $500 fine.² One escape valve: if you correct the violation before the court imposes the fine, the judge can reduce it to $50.

On a third conviction within five years, CAL FIRE can hire contractors to do the clearing work and bill you. Paying that bill waives the fine, but the cost of professional fuel reduction will almost always exceed it.² Local agencies that follow the state’s model inspection program have a separate tool. They can perform abatement themselves and recover the cost by recording a lien against your property, which then surfaces on any future sale or refinance.⁹

Liability If Fire Spreads From Your Property

Those fines are the state’s consequences. The larger financial exposure comes from private lawsuits. If a wildfire starts on or moves through your property because you failed to maintain defensible space, neighbors whose homes burn can sue you for damages. California courts can treat a violation of a fire safety statute as negligence per se, so a plaintiff does not have to prove you were careless in general; the statutory violation establishes that you fell below the required standard of care.

A single lost home routinely costs hundreds of thousands of dollars. Fires that jump property lines and hit multiple structures can generate claims in the millions. Homeowners’ insurance policies often exclude or limit coverage for liability tied to a policyholder’s failure to comply with fire safety laws, which is where most owners underestimate what deferred yard work can actually cost.

Disclosure When You Sell

Selling residential property in a high or very high fire hazard severity zone triggers a wildfire disclosure requirement if the home was built before January 1, 2010. You must give the buyer a written statement explaining that the home predates modern Wildland-Urban Interface building codes and may need improvements to reduce vulnerability.¹⁰

You also have to identify specific vulnerability features you know about:

Eave, soffit, and roof vents with openings larger than one-eighth of an inch or that lack flame and ember resistance
Roof coverings made of untreated wood shingles or shakes
Combustible vegetation or materials within 5 feet of the home or under attached decks
Single-pane or non-tempered glass windows
Loose or missing bird stopping in roof flashing
Rain gutters without metal or noncombustible covers

Since July 1, 2025, sellers must also include a list of low-cost retrofit measures and disclose which of them, if any, were completed during their ownership. If you have a defensible space inspection report, you must give the buyer a copy or tell them where to obtain one.¹⁰

Insurance: Discounts and Access

The California Department of Insurance runs the Safer from Wildfires program, which lists ten actions that qualify for premium discounts. Each completed step earns a reduction. The qualifying measures include a Class-A fire-rated roof, a maintained 5-foot ember-resistant zone, ember-resistant vents with noncombustible mesh, noncombustible material on the bottom 6 inches of exterior walls, enclosed eaves with soffits, multi-pane windows, cleared vegetation and debris from under decks, combustible outbuildings moved at least 30 feet from the home, full defensible space compliance, and participation in a community program such as Firewise USA.¹¹

Some carriers offer their own mitigation discounts of up to 12.5% based on Insurance Institute for Business and Home Safety guidelines. Available savings vary between companies, so ask your insurer specifically what steps they reward. Going the other way, insurers can require more than 100 feet of clearance if a fire expert designated by the local fire chief determines the additional distance is necessary to protect the structure.³ In high-risk areas where many carriers have pulled out of the market, documented defensible space compliance is increasingly a prerequisite for getting a policy at all.

Narrow Exemptions

The statute allows exceptions rather than broad exemptions. The State Fire Marshal can exempt structures built entirely with nonflammable exterior materials, or vary the vegetation clearance based on a building’s contents and construction, but the exemption takes effect only after the owner or occupant files written consent allowing the State Fire Marshal to inspect the interior at any time.¹ Other situations that adjust the obligation:

You are not required to clear vegetation on land you do not own or control. Work on a neighbor’s property needs their written permission.
The 100-foot clearance does not apply to single specimens of well-pruned, well-maintained trees that will not carry fire between other vegetation and the structure or catch wind-blown embers.
The statute directs owners to minimize erosion, soil disturbance, and the spread of flammable nonnative plants while meeting the clearance goals, which gives some flexibility on sensitive terrain.

There is no blanket statutory exemption for historical properties, cultural sites, or endangered species habitat under PRC 4291. If your parcel involves protected species or a historical designation, you may have competing obligations under environmental or preservation law, but those do not override defensible space; the practical path is to work with CAL FIRE and the other agency to find an approach that satisfies both.¹

Help Paying for the Work

Professional vegetation clearing can run from several hundred to several thousand dollars per acre depending on terrain and fuel density. FEMA’s Hazard Mitigation Grant Program and its companion Hazard Mitigation Grant Program Post Fire fund wildfire mitigation projects, including vegetation management and fuel reduction.¹² These grants generally flow through state and local governments rather than to individual homeowners, so ask your county Office of Emergency Services or local CAL FIRE unit about current funding cycles before you hire out the work.

1
California Legislative Information. California Code PRC 4291 – Defensible Space
2
California Legislative Information. California Code PRC 4291.1 – Penalties for Defensible Space Violations
3
California Legislative Information. California Code GOV 51182 – Defensible Space in Very High Fire Hazard Severity Zones
4
California Office of the State Fire Marshal. Fire Hazard Severity Zones
5
Office of the Governor. Assembly Bill 3074
6
CAL FIRE. Defensible Space
7
New York Codes, Rules and Regulations. Title 14 CCR 1299.03 – Defensible Space Maintenance Requirements
8
Ready for Wildfire. Defensible Space
9
California Office of the State Fire Marshal. Model Defensible Space Inspection Guide
10
California Legislative Information. California Code CIV 1102.6f – Wildfire Disclosure Requirements
11
California Department of Insurance. Safer from Wildfires
12
FEMA. FEMA Grants States Additional Time to Complete Critical Hazard Mitigation Projects