Chapter 7A moved — read this before you cite it
Through the end of 2025, California's wildfire construction requirements lived in Chapter 7A of the Building Code. Under the 2025 code cycle, effective 1 January 2026, that chapter was removed from Part 2 and relocated into a new standalone California Wildland-Urban Interface Code at Title 24 Part 7. The requirements did not vanish; the address changed. Plan sets, HOA rules and contractor quotes still say 'Chapter 7A' and will for years, so both names belong in the same conversation.
Whether the rules apply to you at all
They apply in designated Fire Hazard Severity Zones. The State Fire Marshal identifies and recommends those zones under Government Code §51178, and local agencies designate them by ordinance under §51179. Whether your parcel is inside one is a question with a definite answer, and it is the first thing to establish — it determines whether a compliant door is a legal requirement or a voluntary upgrade.
What a compliant exterior door actually has to be
Under the legacy §708A.3 numbering there is no single mandate but a menu of compliance paths: noncombustible exterior facing, ignition-resistant material, solid-core wood of specified thickness, a 20-minute fire-resistance rating tested to NFPA 252, or testing to ASTM E2707 / SFM Standard 12-7A-1. Anyone who tells you 'the code requires a 20-minute rating, full stop' is describing one option as if it were the only one.
The 1/8-inch gap rule nobody mentions
The requirement that actually decides most garage door jobs is the perimeter gap: §708A.4 limits the gap at the top, bottom and sides of a garage door to 1/8 inch. Houses in wildfire zones are lost to ember intrusion far more often than to flame front, and a garage with a half-inch gap under the door is an ember collector. This is achievable with good weatherstripping and a properly set door, and it is where the money is best spent.
The rest of the WUI package
A compliant door does not stand alone. Defensible space under Public Resources Code §4291 requires 100 feet of managed clearance around structures in State Responsibility Areas, and vent, eave and siding requirements travel with the same code. A hardened door in an unhardened envelope buys less than it looks like it does.
Which California markets this really matters in
The Santa Monica Mountains and Malibu, the Santa Clarita and San Gabriel foothills, the San Bernardino mountain communities, the Sierra foothills from Auburn to Placerville, the Sonoma, Napa and Santa Rosa hills, Ojai and the Santa Barbara foothills, and the Butte County corridor around Paradise and Chico. In those markets a door decision is a fire decision.
