California Fire Safe Solutions

California Public Resources Code 4291 mandates defensible space around all structures in State Responsibility Areas (SRAs). But the requirements are a floor, not a ceiling - and understanding what's actually required (versus what's actually protective) is the difference between checking a box and protecting your home.

The Two Zones

Zone 1: The Lean, Clean, and Green Zone (0–30 Feet)

Zone 1 is the area immediately surrounding your structure, including decks and outbuildings. The goal is to eliminate ignition sources and remove ladder fuels - the path by which fire climbs from ground level to the structure.

Zone 1 Requirements:

Remove all dead and dying vegetation

Clear defensible space from under and within 10 feet of decks

Remove branches within 10 feet of any chimney

Keep grass and ground cover mowed to 4" or less

Space plants so fire cannot travel between them

Remove plants directly touching the structure

Zone 2: The Reduced Fuel Zone (30–100 Feet, or to Property Line)

Zone 2 doesn't need to be stripped bare - it needs to be managed so fire can't build intensity as it approaches Zone 1. Think spaced, maintained landscaping rather than cleared land.

Zone 2 Requirements:

Remove dead vegetation

Space single trees so canopies don't touch

Maintain ground fuel clearance under trees

Remove ladder fuels (branches low to the ground)

Keep grass mowed and irrigated when possible

What the Law Doesn't Cover

The code covers direct structural risk and fire department access. It doesn't optimize for:

Wind direction and slope-driven fire behavior

Specific vegetation types and moisture content

Your structure's ember vulnerability

Insurance underwriter expectations

A professional defensible space assessment goes beyond the legal minimums to evaluate what your specific property actually needs based on how fire would actually approach it.

Who Enforces It?

In California, compliance can be required by CAL FIRE, local fire departments, and increasingly by insurance carriers. Some insurers now conduct aerial inspections of properties before renewal. A non-compliant property isn't just a fire risk - it's an insurance risk.

Getting an Assessment

If you're unsure whether your property meets Zone 0, Zone 1 and Zone 2 requirements, or if you've received a notice of violation, a professional assessment will identify exactly what needs to be corrected and in what order. CaliFSS handles both the assessment and the physical work under our own contractor's license.