Zone Zero Requirements in San Diego
San Diego wrote the case for this law in 2003
The Cedar Fire remains the most destructive fire in San Diego history: roughly 273,000 acres and more than 2,800 structures lost, with 15 lives. It stood as the largest wildfire California had ever recorded.
Four years later the Witch Creek Fire tore through the county's north inland corridor and took over a thousand homes more. In both fires, wind-driven embers, not the flame front, did most of the damage: igniting fences, mulch, and vegetation pressed against houses.
From the canyon rims inside city limits to the backcountry towns, if your parcel sits in a Very High zone, Zone Zero applies to you.
What Zone 0 requires, and when
Requirements arrive in phases. Rebuilds and new construction comply from day one.
Clear the five feet
Mulch, dead plants, firewood, stored items: all of it leaves the 0–5 ft zone. Estimated deadline 2027–2028.
Replace what burns
Combustible fences, gates, and attached decks in the zone get replaced. Your local jurisdiction sets the deadline, up to 5 years after adoption.
New fences & rebuilds
No new combustible fences in Zone Zero once regulations adopt. Rebuilds meet Zone Zero from day one, with no grace period.
Harden vents now
Ember-resistant vents are the highest-value upgrade you can make today. No deadline needed.
Your local rules are the ones that count
The state writes the floor; your city or county writes the rules you'll actually follow. Inside city limits that's San Diego Fire-Rescue, with its own codes, timelines, and inspection program. Across the county's other cities and backcountry, it's your local Authority Having Jurisdiction. San Diego officials have signaled a progress-first posture: as the city's assistant fire marshal put it, "we're looking for progress, not perfection."
San Diego Fire-Rescue
Your Local AHJ
County guides, community by community
Dedicated guides for San Diego County's highest-risk communities are rolling out here (each covers its own AHJ, deadlines, and fire history):
Quick answers for San Diego homeowners
Who enforces Zone Zero in San Diego?
Inside city limits, the San Diego Fire-Rescue Department. Outside the city, enforcement follows your local Authority Having Jurisdiction, which varies across the county's cities and unincorporated areas. The free assessment confirms which agency covers your parcel.
Is this the same as the brush management rules I already follow?
No. San Diego's existing defensible space rules cover vegetation across a wide band around your home. Zone Zero adds a stricter standard for the first 5 feet only, and it covers everything: fences, mulch, and stored items, not just plants.
When does enforcement actually start?
Final state regulations are expected late 2026. New-fence and rebuild rules apply immediately at adoption; clearing requirements for existing homes follow, estimated 2027–2028. Local reporting suggests San Diego enforcement will be progress-focused rather than punitive at the start.
My neighborhood didn't burn in 2003 or 2007. Does this apply to me?
If your parcel is in a Very High Fire Hazard Severity Zone, yes. Zone maps follow terrain and vegetation, not fire history. Check your address against the official maps, or let the free assessment confirm it.
Find out exactly what your home needs
Free assessment from a CSLB-licensed local contractor. Know where you stand before the deadlines do.