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Zone Zero in Aliso Viejo: the corridor between two fires' worth of lessons

What the ember-resistant zone rules mean for this city, under its actual designation and its actual fire authority.

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Quick answer: Aliso Viejo carries a Very High designation, with Orange County Fire Authority (OCFA) as the local fire authority. Zone Zero requires an ember-resistant zone in the first 0 to 5 feet around structures in the mapped Very High areas, with the combustible-fence restriction taking effect immediately upon adoption of the final regulations.

The local snapshot

Where Aliso Viejo stands

Aliso Viejo sits directly between Laguna Beach and Laguna Niguel along the Aliso Canyon corridor, the same corridor the 2022 Coastal Fire used. The city is confirmed Very High on the 2025 maps, and its exposure is corridor exposure: wind moving through the canyon system tests every property edge facing it. Zone Zero (Zone 0) requirements apply in the mapped zones.

Very High
confirmed on the 2025 maps
2022
Coastal Fire evacuations reached the city
Aliso Canyon
the shared corridor with Laguna Beach and Laguna Niguel
OCFA
the city's fire authority

Fire record

On the Coastal Fire's corridor

The Coastal Fire ignited in Aliso Canyon in May 2022, and while the destroyed homes were in Laguna Niguel, evacuation orders reached into Aliso Viejo as the fire moved through the shared canyon system. The city's designation reflects that geometry: the corridor doesn't respect city lines, and the ember-resistant first five feet is the defense each Aliso Viejo property on the canyon side controls for itself.

Who enforces it

Orange County Fire Authority (OCFA)

OCFA is the Authority Having Jurisdiction here. The state Zone 0 framework is the floor; OCFA's adopted schedule and inspection program set the local specifics. Deadlines pages carry the state defaults; your jurisdiction sets the specifics, and this page names yours. For the requirements themselves, start with the regulations guide, fences and gates, and landscaping.

Questions

Quick answers

Is Aliso Viejo really in a Very High zone?

Yes, confirmed in the 2025 mapping cycle. The city shares the Aliso Canyon corridor with Laguna Beach and Laguna Niguel, whose designations bracket it on both sides.

Was Aliso Viejo affected by the Coastal Fire?

Evacuation orders reached into Aliso Viejo in May 2022 as the fire moved through the Aliso Canyon corridor from its ignition point, though the destroyed homes were in Laguna Niguel's Sea Country area.

What does Zone 0 require of canyon-facing Aliso Viejo homes?

A noncombustible first five feet: no combustible fences or gates at the structure, no bark mulch at the foundation, no stored fuel in the ring. Corridor wind makes those edges the test points.

Find out what your Aliso Viejo property needs

A free assessment tells you exactly which Zone Zero requirements apply to your parcel, what your local fire authority will look for, and what to fix first. 100% free, no obligation.

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