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What the ember-resistant zone rules mean for this city, under its actual designation and its actual fire authority.
The local snapshot
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.
Fire record
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
OCFA is the Authority Having Jurisdiction here. Statewide Zone 0 is Proposed — not in force. Existing defensible-space law still applies. OCFA Guideline C-05 is a new-construction fuel-modification plan-review rule, not a countywide existing-home Zone 0 ordinance. Deadlines pages carry local status labels, not a 2027 to 2028 statewide clock; 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
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.
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.
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.
Submit your address and we will follow up about which local rules apply to your parcel, what your fire authority will look for, and what an inspection would document.
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