Compliance Guide
Chapter 7A is gone. Here's what your rebuild must meet now.
On January 1, 2026, California moved its wildfire construction rules out of Chapter 7A and into a standalone code. The requirements barely changed, but the new Zone 0 rules approved in August 2026 add a requirement new construction must meet immediately.
The short answer
Under the 2025 Title 24 cycle, the Building Standards Commission deleted Chapter 7A from the California Building Code and relocated its provisions into Part 7, the California Wildland-Urban Interface Code (CWUIC). The technical content carries forward almost unchanged into CWUIC Chapter 5. Your assemblies are the same. The citation is different, and most contractor guides online still have the old one.
If you are rebuilding in Altadena, fire-hardening is not a design upgrade you weigh against other priorities. It is the baseline your plans must clear to get a permit, and it shapes decisions from roof profile to vent placement. This guide covers what the code requires, what changed this year, and where homeowners most often get caught.
What changed on January 1, 2026
For nearly two decades, California's wildfire construction standards lived in Chapter 7A of the Building Code, with parallel provisions in Residential Code Section R337 and Fire Code Chapter 49. That fragmentation caused real confusion, three places to look, and inconsistent references between them.
The 2025 Title 24 cycle consolidated all of it. The new California Wildland-Urban Interface Code is modeled on the International Wildland-Urban Interface Code and includes a cross-reference tool mapping each provision back to its original source. For projects designed under the 2022 code, the Chapter 7A technical content carries forward almost unchanged into CWUIC Chapter 5.
Why this matters for you
FF&E is the line item that surprises families most, because it sits outside every per-square-foot figure and lands right when the money is thinnest. Ask us for the breakdown and we will send the categories, what falls inside a construction contract versus outside it, and the allowance ranges we see on Altadena rebuilds at each finish level.
Does it apply to your parcel?
Wildfire construction requirements are mandatory in State Responsibility Area lands classified Moderate, High, or Very High Fire Hazard Severity Zone, and in Local Responsibility Area Very High Fire Hazard Severity Zones. Altadena rebuild parcels fall inside this footprint.
The maps have also expanded. CAL FIRE adopted updated SRA maps effective April 1, 2024, and released LRA recommended maps in phases through early 2025, widening the covered area in many counties. If your parcel was outside a designated zone before the fire, it may not be now. Confirm the current classification with LA County Building and Safety before design begins.
What the code requires, assembly by assembly
The code targets the exterior components most vulnerable to wildfire. Embers, not walls of flame, destroy the majority of homes: they enter through vents, collect in eaves, and ignite decks.
Component
Requirement
Roof covering
Class A assembly. Valleys, gutters, and roof-to-wall intersections detailed to block ember entry. Gutters require noncombustible debris guards.
Exterior walls
Ignition-resistant or noncombustible material, full height and to the underside of eaves. Fire-rated stucco is the common choice in Altadena and reads correctly on Spanish and Cottage architecture.
Vents
Noncombustible corrosion-resistant mesh, openings between 1/16" and 1/8", or a listed ember-resistant vent assembly. Vents prohibited in soffits and eave overhangs unless a listed assembly is used.
Windows & glazing
Multi-pane glazing with at least one tempered pane, or a fire-resistant rated assembly. Frames must meet ignition-resistance requirements.
Exterior doors
Noncombustible, ignition-resistant, or solid-core construction. Glazing in doors follows window requirements.
Eaves & soffits
Enclosed and protected with ignition-resistant materials. Open eaves are the most common redesign we make on inherited plans.
Decks & appendages
Walking surfaces of ignition-resistant, noncombustible, or listed exterior-fire-tested material. The zone under a deck matters as much as the surface.
Accessory structures
Structures within defined proximity of the dwelling are covered: detached garages, ADUs, and covered patios are not exempt.

Fire-rated stucco applied full height to the underside of protected eaves, under a Class A roof assembly: the two largest envelope requirements in one elevation.

Fire-rated stucco applied full height to the underside of protected eaves, under a Class A roof assembly: the two largest envelope requirements in one elevation.
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Have your plans reviewed for code compliance.
Send us drawings from any architect and a principal will walk the assemblies above with you, roof, vents, eaves, glazing, decks, Zone 0, and flag what plan check will catch. Thirty minutes, on a call or at the lot.
The Design Roadmap
From loss to coming home
MONTH 0
MONTH 0
MONTH 0
Drawn to scale: segment length is proportional to each phase's typical duration. Permitting overlaps the tail of design, so the five phases total 16 to 18 months rather than the sum of their parts.

01
2–4 weeks
Consultation
We walk the lot, understand your family, and set the vision and budget together.

02
3–4 months
Design
Architecture, interiors, and material selections, custom or semi-custom.

03
2–4 months
Permits
We navigate LA County and Altadena approvals, including fire-rebuild pathways. Submittal starts before design is fully closed out, so these months overlap.

04
10–12 months
Build
Ground-up construction with fire-rated assemblies and weekly progress updates.

04
2–6 weeks
Homecoming
Final walkthrough, warranty, and the keys to a home built to be handed down.
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Enhaus Design & Build · License #1104705
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778 Alameda St, Altadena, CA 91001
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Keep reading
Guide
Chapter 7A & the new WUI code
What changed January 2026, and the assemblies your rebuild must meet.
Guide
Altadena permit & build timeline
EPIC-LA, the Unified Permit, and how long a rebuild really takes.
Portfolio
Homes we're building in Altadena
Spanish, Cottage, and Modern rebuilds underway right now.

