Wood-to-Steel Plan Conversion for Los Angeles Homes

APB Inc. is a California-licensed light-gauge steel (LGS) framing contractor in Los Angeles. We convert wood-frame home plans to steel and build them — for wildfire rebuilds and custom homes across Southern California.

This page explains what a wood-to-steel conversion involves, what you receive, how the process runs and what to expect from the building department.

Can you convert wood plans to steel framing?

Usually, yes. Many residential designs can be framed in light-gauge steel while keeping the floor plan and elevations. It is not a material swap, though: the structure is redesigned in cold-formed steel and stamped by a California-licensed engineer, the hold-downs and anchors change, the foundation may change, the Title 24 energy compliance is redone, and the revised set goes back to the building department for review. Every conversion starts with a feasibility review of your plans.

Why convert to steel at all?

Homeowners convert for specific reasons: a frame termites can't eat, a noncombustible structure inside a fire-hardened house, and straight walls. In our experience, a frame built from factory-made steel panels comes in close to the cost of a comparable wood frame, and it avoids termite and rot repairs over the years. We are direct about what steel does and doesn't do. Read why steel framing pays off in California and termite-resistant homes in California.

Who this service is for

• Homeowners with approved or in-progress wood plans. You may be rebuilding after the Eaton or Palisades fires or building a custom home, and you want a noncombustible structure without starting the design over.
• Architects and designers. You want to keep your design and your client relationship while a steel framing contractor and a licensed engineer handle the structural change.
• Builders and general contractors. You need a framing subcontractor that can take a wood set through steel engineering and then frame it.

The goal is to keep your floor plan, elevations and finishes wherever the engineering allows. What changes is the structure behind them.

What you get

An engineered LGS framing package

Your structure is redesigned in cold-formed steel and stamped by a California-licensed engineer. The package covers wall, floor and roof framing, member sizes (for example, 600S162-54 studs), connections and the vertical and lateral calculations.

This step is not optional. California's unlicensed-plan exemption covers woodframe homes only (Business and Professions Code Section 5537), and LA County's fire-rebuild submittal requirements call for licensed calculations for nonconventional construction. So a steel home in Los Angeles needs engineered, stamped plans.

An updated hold-down and anchor schedule

Steel shear walls are designed differently from wood shear walls (under AISI S400, using wood structural panels or steel sheet). The hold-downs, anchor bolts and their locations usually change, and the foundation plan may change with them.

Title 24 energy update coordination

Steel studs conduct heat much more than wood studs. Cavity insulation alone generally does not meet California's energy standards in a steel wall, so continuous exterior insulation is usually part of the design. Your energy compliance documents (CF1R) have to be recalculated for the steel assemblies. We coordinate that update with your energy consultant or designer.

Revision submittal support

We help assemble the revision set, coordinate between your architect, the engineer and the energy consultant, and respond to plan-check comments with the engineer of record.

Then we build it

Once the revision is approved, the steel panels are fabricated in Utah to the approved drawings and shipped to your site, and APB Inc. frames the house in light-gauge steel.

What changes when a wood plan becomes a steel plan

How it works: five steps

1. Send your plans

Email or upload your current plan set and a few details about the project (see the list below). There is no obligation at this stage.

2. Feasibility review

We review the design for steel: spans, openings, roof geometry, shear wall layout, foundation and permit status. If conversion does not make sense for your project, we tell you.

3. Engineering and drawings

The steel structure is engineered together with the panel manufacturer's engineers, and a California-licensed engineer stamps the drawings and calculations. We coordinate the hold-down and anchor schedule and the Title 24 update at the same time.

4. Plan-check revision

The revised set is submitted to your building department. We help respond to plan-check comments until the revision is approved.

5. Fabrication and framing

The steel panels are fabricated in Utah to the approved drawings and shipped to your site, numbered to match the shop drawings. APB Inc. frames the house and works with your general contractor or team through inspections.

What to send us

• PDF plans. The full set you have: architectural, structural and Title 24 documents if available.
• Permit status. Approved, in plan check or not yet submitted, plus any permit or plan-check number.
• Property address. It tells us the jurisdiction, fire hazard zone and energy climate zone.
• Your timeline. When you hope to start framing and any deadlines you are working against.

If you have a soils report or existing structural calculations, include those too.

Honest notes before you decide

It is a structural redesign

Switching from wood to steel is not a material substitution. The engineer redesigns the structure, the hold-downs and anchors change, the foundation may change, and the energy compliance is redone. All of it goes back to the building department for review.

Pre-approved standard plans lose pre-approved status

LA County states that its pre-approved standard plans cannot be customized and that changed plans must follow the general review process. LADBS says customization depends on the design and that site-specific changes may need more City review. Changing the structure to steel is a significant change, so expect a converted standard plan to be reviewed as a custom project. We have not confirmed a steel-framed plan in either catalog.

Plan for revision and fabrication time

In our experience, the plan-revision step for a wood-to-steel change usually takes about one week to 10 days, and from the start of a conversion to steel panels delivered to your site typically takes about 90 days. Actual time depends on the design, your jurisdiction, the reviewer's comments and how quickly each party responds. We confirm a schedule for your project after the feasibility review.

Confirm the code edition first

A plan approved under the 2022 codes may be reviewed under the 2025 codes when it is revised, or it may keep its original edition. For Eaton and Palisades fire rebuilds, Executive Order N-29-25 lets projects comply with the 2022 code. Ask your building department which edition the steel revision will use before engineering starts, because it affects the wildfire, structural and energy requirements.

Steel is one layer of wildfire protection

Steel studs are noncombustible: they don't burn or add fuel. Fire ratings come from the full wall assembly, and wildfire survival also depends on the roof, vents, windows, siding and the 5-foot zone. Read Steel Framing for Wildfire Rebuilds: What It Does and Doesn't Do and our guide to California's new WUI Code.

We don't publish prices

Cost depends on the design, the amount of re-engineering, any foundation changes, insulation and current steel and lumber market conditions. We discuss scope and cost after reviewing your plans.

Rebuilding after the January 2025 fires?

Local rules differ between unincorporated LA County and the City of Los Angeles. Fee waivers, expedited review and Prop 13 relief apply to eligible rebuilds whatever the framing material, so use them regardless of the plan you choose. See our guides for Altadena and Pacific Palisades, and check your address for fire hazard zone, burn perimeter and climate zone.

Start with a plan review

Send your plans, permit status, address and timeline through our contact page. We will tell you whether a steel conversion fits your project and what it would involve.

Why homeowners choose steel framing with APB

Converting a plan keeps your design and moves the structure to a frame that termites can't eat and that adds no fuel to a fire. We handle the coordination between your architect, the licensed engineer, your energy consultant and the building department, so the revision is one managed step. Read why steel framing pays off in California, then contact us with your plans for a feasibility review.