Non-combustible light gauge steel frame homes on Eaton Fire lots. Built to Chapter 7A, permitted through LA County, and framed in a material that does not burn.
On January 7, 2025 the Eaton Fire started above Altadena and ran through it. It burned 14,021 acres and destroyed 9,414 structures, per CAL FIRE damage assessments. Altadena absorbed most of that. Nearly all of what burned was wood frame.
Altadena is not a city. That is the first thing most people get wrong, and it changes who you deal with. There is no Altadena building department. Altadena is unincorporated Los Angeles County, so permits go through the LA County Department of Public Works, Building and Safety Division, with land use handled by County Regional Planning. Neighboring Pasadena is its own jurisdiction with its own rules and its own timeline, so advice from someone rebuilding a mile south may not apply to your lot. The County has stood up an expedited pathway for Eaton Fire rebuilds.
Most of Altadena sits in a Very High Fire Hazard Severity Zone, and the parcels that burned are still in one. That means Chapter 7A of the California Building Code governs the exterior of anything you build: ember-resistant vents, Class A roof, enclosed eaves, glazing, decking. It applies whether you frame in wood or steel. Worth understanding early, because it shapes the design, not just the finish schedule.
The thing people underestimate is how the fire actually took the houses. It was mostly embers, not a wall of flame arriving all at once. Embers find a vent, an eave, a gap in the deck, and the house burns from a small start. That is why the envelope matters so much, and it is also why the frame matters. A wood frame is fuel waiting for one ember to find its way in.
The lots themselves are their own problem. Some have a foundation worth keeping and some do not. Debris clearance, utilities, soil after a burn, and slope stability up toward the canyons all vary parcel to parcel. Anyone who quotes you a rebuild without walking the lot is guessing.
1. It does not burn. Light gauge steel is non-combustible, rated to ASTM E136. It does not ignite and it does not feed a fire. On a lot where the last house was lost to embers, the frame is the part of the decision you cannot revisit later. Everything else in a house can be redone eventually. Not the frame.
2. Chapter 7A gets simpler. You still have to harden the envelope either way. But building the structure itself out of a non-combustible material means the whole assembly reads consistently, from slab to ridge, instead of hardening an exterior wrapped around fuel.
3. Insurance is the quiet reason. Carriers have pulled back hard from wood frame coverage in California fire zones. A hardened, non-combustible home is materially easier to insure. The amount is set by your carrier and we are not insurance producers, so talk to them, but it is one of the few levers you actually control on a rebuild.
4. It holds up over time. Steel does not rot, warp, twist, host mold or feed termites. It is inorganic, so there is nothing in it for an insect or a spore. It is also lighter than an equivalent wood frame, which matters on the sloped lots running up toward Chaney Trail and Millard Canyon, and it is engineered to current California seismic code.
We build across Altadena, with most of the current work sitting in the neighborhoods the Eaton Fire went through:
Eaton Fire rebuilds. Full custom rebuilds on burned lots. Chapter 7A compliance, documentation your carrier will ask for, and permitting coordinated through LA County Building and Safety. Read our Altadena and Eaton Fire rebuild guide → Wildfire rebuild service →
New custom homes. Ground-up light gauge steel frame homes on Altadena lots. The engineering, the steel supply and the framing come under one contract, so you are not managing three vendors. More on how we build in steel →
Steel frame ADUs. Detached and attached units under California ADU law and the County ordinance. Several Altadena owners are putting an ADU up first so they have somewhere to live while the main house is built. ADU service →
Working with your architect. If you already have an architect, good. The structural questions are cheapest to answer before the drawings are final, so we would rather be in the conversation early than value-engineer the design later. For architects →
Yes. Altadena is our most active rebuild market. We build non-combustible light gauge steel frame homes across Altadena, including the neighborhoods hit hardest by the January 2025 Eaton Fire. ESRL is a licensed California general contractor, License #1149234, owner-led with 22 years building in California.
Altadena is unincorporated Los Angeles County, not a city, so it has no city building department of its own. Permits are issued by Los Angeles County, through the Department of Public Works Building and Safety Division, with planning handled by County Regional Planning. This catches people out, because neighboring Pasadena is its own jurisdiction with its own rules. LA County established an expedited pathway for Eaton Fire rebuilds.
Per CAL FIRE damage assessments, the Eaton Fire destroyed 9,414 structures after igniting on January 7, 2025 and burning 14,021 acres. Altadena took the overwhelming share of that loss. Nearly all of the destroyed housing stock was wood frame.
In the Very High Fire Hazard Severity Zones covering much of Altadena, yes. Chapter 7A of the California Building Code governs the exterior envelope: ember-resistant vents, Class A roof assemblies, enclosed eaves, exterior glazing, and decking. It applies regardless of what the frame is made of. A non-combustible structure complements a hardened envelope, it does not replace the requirement.
Most homes in the Eaton Fire were lost to embers rather than a wall of flame, and a wood frame is fuel. Light gauge steel is non-combustible, rated to ASTM E136, so the structure does not ignite or feed a fire. It also does not rot, warp, host mold or feed termites, and it is engineered to current California seismic code. The frame is the one part of a house you cannot upgrade later, which is why it is worth deciding carefully on a rebuild you intend to keep.
Materially easier, though the amount is set by your carrier and ESRL is not an insurance producer. Carriers have pulled back sharply from wood frame coverage in California fire zones. Hardened, non-combustible construction is one of the few levers a homeowner actually controls, and it is worth discussing with your carrier before you finalize a structural decision.
The construction is rarely the surprise. Permitting and plan check through LA County are the schedule variable, along with lot conditions such as remaining foundation, utilities and debris clearance. Budget the approval time first and build the construction schedule after it. A panelized light gauge steel shell erects in about a day, which compresses the framing phase and lets every following trade start sooner.
Free 30-minute pre-construction consultation. Code path, County permitting, schedule, scope. We will walk your lot before we say anything about it.
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