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Custom Steel Buildings in California

Engineered for California Seismic Zones & 85–110 MPH Winds

From high seismic zones near the coast to wildfire-prone interior regions, our pre-engineered steel buildings meet California Building Code (CBC) Title 24 requirements statewide, including ASCE 7-16 seismic and wind design standards. Fully engineered for Seismic Design Category D and E zones. Factory-direct pricing, fast delivery, and custom sizing for garages, workshops, and commercial buildings.

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ENGINEERED FOR CALIFORNIA CODES

Compliant with CBC Title 24 & ASCE 7-16

SEISMIC & WIND CERTIFIED

Designed for Seismic Design Category D/E zones

Factory Direct

Best pricing,
no dealer markup

DELIVERED STATEWIDE

Los Angeles, San Francisco, San Diego, Sacramento & beyond

WHY BUY FROM US

Build to Last. Built for California.

Engineered for California Codes

All buildings meet or exceed California Building Code (CBC) Title 24 and ASCE 7-16 standards, engineered for your specific county's requirements.

Seismic & Wind Certified

Designed for Seismic Design Category D and E zones, with wind ratings of 85–110 MPH engineered to your site's exposure category.

Factory Direct Pricing

No middlemen, no dealer markup. Direct factory pricing on every California steel buildings , best value, guaranteed quality.

Fast California-Wide Delivery

Delivered to Los Angeles, San Francisco, San Diego, Sacramento, Fresno and every county in between, on schedule.

Custom Design Available

Fully customizable sizing, colors, and layouts ; garages, workshops, and commercial buildings, engineered to your site.

Warranty Included

Industry-leading structural warranty on every California building, backed by manufacturer support for long-term peace of mind.

BUILT FOR EVERY CALIFORNIA REGION

Designed for Every Part of California

California steel building zones map showing Bay Area, Central Valley, Sierra, and South regions.

Coastal & High-Wind Zones

Engineered for Savannah and Chatham County's coastal wind exposure, rated up to 140 MPH to meet Georgia's adopted ASCE 7-16 coastal wind provisions.

Seismic Design Category D/E

Engineered for California's high seismic zones, including the Bay Area and Southern California fault regions, per ASCE 7-16 seismic design standards.

Wildfire & WUI-Ready Construction

Non-combustible steel construction suited to California's Wildland-Urban Interface (WUI) zones , a natural fit where wood-frame alternatives face stricter fire code scrutiny.

Sierra & Mountain Snow Load

Rated for the ground snow loads seen across the Sierra Nevada and Northern California mountain regions.

POPULAR USES IN CALIFORNIA

Built for How Californians Live, Work & Grow

Garages

Protect vehicles year-round, statewide.

Workshop

Space to work, built to last.

RV Storage

Secure storage between California road trips.

Barns

Built for Central Valley farm and ranch life.

Commercial

Warehouses and shops, factory-direct.

Storage

Extra space, engineered for California conditions.

Trusted Across THE USA

Thousands of Happy Customers

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Harold Duperron
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Metal Pro has been an absolute pleasure to work with. They answered all my questions, provided information that is required and have made the whole process easy. Jason Rowe was excellent and very helpful.
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William Burton linn
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I purchased a 30x60x16 Quonset Hut through Metal Pro Buildings last year (2025). I was pleased with the customer service, and I am very happy with my high quality Quonset hut. They shipped it to CA right before the stupid Tariffs hit us.
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Gerald Pahara
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Pleasant interactions with Jude during selection and purchase phases. Delivery of components occurred on the date promised.building will be assembled later this year.
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Jeff Avery
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Metal Pro was good to deal with, building was ready as promised, unfortunately Mother Nature let us down and assembly took longer than anticipated this winter. We are very satisfied with the finished product.
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Diver Dale1
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Excellent experience from start to finish. They went above and beyond in all aspects. They ensured that all requirements were met, helped with design and answered my questions quickly. Jason Rowe was very helpful and excellent in the process. I would highly recommend this company to anyone. Thank you.
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Elvin Petersen
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We were very impressed with our package. Drawings were very complete and detailed. All the parts were provided and labelled - everything matched up. We were impressed all the bolt holes and components all lined up properly. Overall for a couple of older average guys assembling in the yard it all went together relatively quickly.
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Frequently Asked Questions

Everything You Need to Know About Steel Buildings in California

How does Metal Pro Buildings engineer structures for California's seismic zones?

Every Metal Pro Buildings structure is custom-engineered to the specific conditions of your California build site. We calculate your exact Seismic Design Category, wind exposure, and site soil class using ASCE 7-16 standards and your precise location , not statewide averages. This ensures your building meets or exceeds California Building Code (CBC) Title 24 requirements without over-engineering, which keeps your costs efficient.

Yes. Most of California falls into Seismic Design Category D or E, requiring lateral force-resisting systems designed to ASCE 7-16 Chapter 12 and, for steel-frame structures, detailing per AISC 341. Metal Pro Buildings engineers every California building to its site-specific seismic category, with PE-stamped documentation for permitting.

Metal Pro Buildings engineers to CBC Title 24 and ASCE 7-16, covering wind ratings of 85–110 MPH statewide and seismic design for Category D and E zones. We provide PE-stamped engineering documentation for every California build.

Steel construction is non-combustible by nature, which is a natural fit for California's Wildland-Urban Interface zones where wood-frame alternatives face stricter fire code scrutiny. For projects requiring formal CBC Chapter 7A WUI certification, confirm specific material and assembly requirements with your local building department.

Earthquake design depends on your Seismic Design Category, site soil class, and building risk category , all set by ASCE 7-16 Chapter 11 and 12. Higher categories (D, E, common across much of California) require stricter lateral bracing and connection detailing than wind-only design in most other states.

Clear-span frames are ideal for large open interiors ( workshops, RV storage, garages ) with no interior columns. Modular framing suits larger commercial buildings needing interior support. Our team helps you choose based on your building's size, use, and California seismic requirements.

For most standard steel buildings, a licensed PE is sufficient. California requires the additional SE license only for specific structure types, such as hospitals and public schools; most garages, workshops, barns, and commercial buildings don't fall under that requirement.

Metal Pro Buildings ships statewide ( Los Angeles, San Francisco, San Diego, Sacramento, Fresno, and everywhere in between ) with delivery timelines depending on building size and current production schedule.

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