California Wildfire Legislation
California's Zone 0 Law: Your Complete Guide to the 5-Foot Defensible Space Requirement
If you're a California homeowner, you've likely heard whispers about "Zone 0" at neighborhood meetings or seen mentions in your insurance renewal letters. But what exactly is this new requirement, and more importantly, what does it mean for you and your family?
Let me walk you through everything you need to know about California's groundbreaking Zone 0 law—not in legal jargon, but in plain English that actually makes sense.
Quick Facts: Zone 0 at a Glance
- What: 5-foot ember-resistant zone around all structures
- Where: State Responsibility Areas (SRAs) and Very High Fire Hazard Severity Zones
- When: Final regulations are still in rulemaking as of June 2026 — see the current status below
- Why: 90% of homes burn from embers, not flames
Where the Zone 0 Rules Stand Right Now (June 2026)
- The deadline passed without final rules. Governor Newsom's Executive Order N-18-25 required the Board of Forestry to finish Zone 0 rulemaking by December 31, 2025. That deadline came and went without adopted regulations.
- A new draft arrived in April 2026. The Board's subcommittee released an updated draft on April 17, 2026 that emphasizes education and phased compliance over immediate penalties.
- Existing homes get a phased runway. Under the current draft, Phase 1 (within roughly 3 years of adoption) covers removing combustibles like mulch, firewood, and dead vegetation from the first 5 feet. Phase 2 (within roughly 5 years) covers items like under-eave safety zones and replacing combustible gates.
- Insurers are not waiting. Carriers and programs like Safer from Wildfires already reward ember-resistant Zone 0 conditions today, and AB 38 inspections at sale already look at the first 5 feet.
The Story Behind Zone 0: Why California Created This Law
Picture this: It's 2020, and California has just weathered another devastating wildfire season. The August Complex Fire became the state's first "gigafire," burning over one million acres. State legislators knew something had to change.
That's when Assembly Bill 3074 (AB 3074) was born. But this wasn't just another reactive policy—it was based on decades of fire science research from institutions like the Insurance Institute for Business & Home Safety and UC Berkeley's Fire Research Lab that revealed a startling truth:
90% of homes that burn in wildfires are ignited by flying embers, not the flames themselves.
Think about that for a moment. While we've all seen dramatic footage of walls of flame approaching homes, the real killer is often something much smaller—tiny, windborne embers that can travel up to 5 miles ahead of a fire front.
Your Zone 0 Checklist: What Stays and What Goes
Zone 0 is the immediate 5-foot perimeter around your home—think of it as your home's personal bubble of protection. Within this zone, California now requires that you eliminate or modify anything that could easily catch fire from flying embers.
What Must Be Removed
Combustible Mulch
- • Wood chips, bark, gorilla hair mulch
- • Why: Can ignite from a single ember in 60 seconds
- • Alternative: Decomposed granite, pea gravel
Vegetation
- • Most shrubs and woody plants
- • Juniper, rosemary, ornamental grasses
- • Synthetic turf (melts and spreads fire)
Structures & Storage
- • Combustible fencing attached to home
- • Firewood, lumber, wooden furniture
- • Items stored under decks
What's Still Allowed
Smart Landscaping
- • Concrete walkways, stone patios
- • Decomposed granite, decorative rock
- • Metal or ceramic planters (under 2ft)
Living Options
- • Irrigated grass under 3 inches
- • Succulent arrangements in proper containers
- • Low-growing groundcover (ice plant, sedum)
Trees (with conditions)
- • Branches 10+ feet from roofline
- • Trimmed up 6 feet from ground
- • Single specimens preferred
Timeline: When These Rules Apply to You
How We Got Here
What the Current Draft Means for Your Home
The April 2026 draft phases in requirements for existing homes after the rules are adopted:
- New construction: Zone 0 compliance is expected to apply first, alongside existing Chapter 7A ignition-resistant building standards
- Existing homes, Phase 1 (~3 years): remove combustible mulch, firewood, dead leaves, and wood chips from the first 5 feet
- Existing homes, Phase 2 (~5 years): under-eave safety zones and replacing combustible gates, on a timeline set by local jurisdictions
Why act before the rules are final: insurance carriers, the Safer from Wildfires framework, and AB 38 sale inspections already evaluate the first 5 feet today. Early compliance is rewarded now — the regulation will only formalize what underwriters already check.
Is Your Property Affected? How to Find Out
Not every California property falls under Zone 0 requirements. The law specifically targets high-risk areas:
State Responsibility Areas (SRAs)
Areas where CAL FIRE has primary wildfire suppression responsibility.
Check CAL FIRE's SRA ViewerVery High Fire Hazard Severity Zones (VHFHSZ)
Even within city limits, certain areas are designated as extreme risk.
View OSFM Fire Hazard Zone MapsZone 0 in Your Neighborhood
Zone 0 looks different in an Altadena rebuild than on a Malibu bluff or a Hollywood Hills lot. We've written local guides covering the fire history, hazard zone designations, and mitigation priorities for the Southern California communities we serve:
Or see our Zone 0 defensible space service and AB-38 inspection preparation pages.
Official Resources & Links
What Fire Science Says About the First 5 Feet
Start with dead vegetation and combustible mulch. IBHS post-fire research consistently finds that combustible material in the first 5 feet — bark mulch, dead leaves, firewood — is among the most common ignition paths for homes lost in wind-driven fires, and among the cheapest to fix.
Zone 0 works as part of a system. CAL FIRE's defensible space framework pairs the ember-resistant zone with Zone 1 (5–30 feet) and Zone 2 (30–100 feet). The zones compound: a clean Zone 0 protects against embers, while the outer zones slow radiant heat and direct flame contact.
Document everything. Before-and-after photos, receipts, and a written scope of work give insurance agents and underwriters something concrete to act on. California's Safer from Wildfires framework ties specific mitigation steps to insurance recognition — but only documented work counts.
How Ready Fire One Makes Compliance Simple
Don't wait for enforcement—or worse, the next wildfire season. RF1 helps Southern California homeowners transform their properties from vulnerable to highly fire-resistant, with documentation that holds up in insurance conversations.
Our 4-Step Process:
- 1. FREE Property Assessment ($500 Value)
- 2. Smart Design Solutions
- 3. Expert Installation
- 4. Ongoing Protection
Why Choose Us:
- ✓ Built around CAL FIRE defensible space standards
- ✓ Insurance-ready photo documentation
- ✓ Local Southern California crews
- ✓ Transparent Pricing
The Bottom Line
Zone 0 isn't just another regulation—it's California's response to a changing climate and increasing wildfire threat. By creating this small buffer of safety around our homes, we're not just protecting property; we're protecting lives, preserving communities, and giving firefighters a better chance to save structures.
Remember: Fire season is now year-round in California. The best time to prepare was yesterday. The second-best time is today.
Ready Fire One provides wildfire home protection across Southern California — assessments, Zone 0 defensible space, home hardening, and insurance documentation.