Prefab Steel Building Kits | Metal Building Kits

Ready to start your building project? Worldwide Steel helps homeowners and DIY builders bring their metal structures to life with high-quality, cost-effective steel building kits. Whether you’re planning a metal garage, small business space, or a custom barndominium, our do-it-yourself kits are built for durability, versatility, and easy assembly.

Our prefab steel building kits are proudly manufactured in the USA, providing the best prices by selling direct from the factory. Each kit includes pre-punched and pre-welded pieces with step-by-step instructions, making assembly simple—no special skills or contractors required, which keeps your building construction costs low and manageable.

These customizable DIY kits suit a variety of needs, whether you’re expanding with a metal garage, creating a workspace, or building a larger steel structure. With Worldwide Steel, you get affordable building prices without sacrificing quality, offering flexibility for any size project.

Explore our steel building kits today to get started on your cost-effective and durable metal structure, backed by the best in the industry.

What Kinds of Steel Building Kits Do We Make?

When it comes to building projects, if you can dream it, we can do it! Our steel components allow for fully custom building designs, including specific dimensions, colors, and window and door placements, tailored to your specific needs. No matter the square foot size, each structure is built to your specs and meets local building codes, handling tough climates and snow loads. Whether it’s for appearance or function, ordering a custom DIY metal building kit makes it simple.

Our customers have created more than just steel garage kits. They’ve built commercial buildings, airplane hangars, arenas, storage buildings, and more.

Explore the images below to see popular options and start designing your dream building today!

Most Popular Building Kits

Industrial Buildings

Our industrial steel buildings are engineered for heavy-duty use, making them ideal for large-scale building construction projects. These durable structures often feature clear span designs, allowing widths of up to 300 feet with no interior supports, perfect for accommodating heavy equipment, storage, or manufacturing needs.

Residential Homes

Dreaming of a custom steel home? Our steel building kits are perfect for modern, efficient, and durable residential spaces, including metal barn homes and barndominiums. Built to meet your exact specifications, these homes offer unmatched longevity and design flexibility.

Garages & Workshops

Whether you need extra space for vehicles or a dedicated work area, our steel garage buildings and workshops provide secure, low-maintenance solutions. Designed to your specifications, these kits are perfect for everything from hobby shops to full-service garages.

Agricultural Buildings

Our agricultural buildings are designed to protect your equipment, livestock, and crops. From pole barns to large storage facilities, our steel structures are engineered to handle heavy use and harsh conditions, ensuring that your investment is safe and secure.

Explore All Steel Building Types

What Is Included in a Worldwide Steel Building Kit?

Our DIY metal building kits come with everything you need—no surprises. With just basic tools like a toolbox, extension ladder, tin snips, and a screw gun, you’ll be ready to assemble your building.

Each kit includes pre-punched and pre-welded steel framing, wall and roofing panels, all necessary fasteners, and clear instructions. You won’t be slowed down by missing pieces or tools—our American-made kits arrive ready to be assembled as soon as you offload them.

We stand by our products with a customer satisfaction guarantee and a limited 50-year warranty, ensuring your steel structure is built to last.

Once your kit arrives, you’ll have everything you need to bring your project to life quickly and efficiently.

Download these helpful guides:

How Easy Is It to Assemble a Steel Building Kit?

You don’t need advanced skills or prior experience to build your own steel building. When we say do-it-yourself, we mean it. Worldwide Steel Buildings designs metal building kits to be professional-grade yet easy to assemble.

No matter the size, our kits are truly DIY. With pre-punched trusses, factory-welded clips, and self-sealing screws, we’ve simplified the process so you won’t need a contractor.

Want to see how easy it is? Check out the Worldwide Steel Online Assembly Manual or watch our step-by-step video to get a closer look at how to build your steel building.

Assembly Process:

How Custom Are Your Steel Building Kits?

Our steel building kits offer far more versatility than the term “prefab” suggests. With Worldwide Steel, you can choose from over 42 million design variations and customization options to create a truly unique steel building.

You control everything—from dimensions, colors, and exterior finishes to features like lofts or covered outdoor areas. Once built, you can further customize the interior with living spaces, bathrooms, bedrooms, and more. A Worldwide Steel building system is designed to be fully customized to fit your needs.

Example Layouts for Garage Shops & Man Caves:

custom layout of a steel building kit for a man cave

How Do I Get My Own Custom Steel Building Kit?

For more information or to request a building quote, call us or fill out this form.

You can also design your building first and request a building quote using our Online 3D Building Designer:

Start by setting the dimensions of your steel building, including width, length, height, roof type and rise!
Customize your design by adding color, windows, skylights, doors, cupolas and more!
When you’re finished save your design, get a free quote, or share it with your friends!

Text reading "Customize your dream steel building with our 3d building designer. Start building now!" over a blueprint background

Need help with financing? View our financing options.

What Do I Do When My Kit Arrives?

Our steel building kits are designed for ease and safety, but handling heavy materials requires care. Here’s what to keep in mind when your building package arrives:

Unloading

When your steel building kit arrives, follow these steps for safe unloading at the job site:

Have a plan: Ensure you have a clear plan for unloading before the truck arrives.
Use proper equipment: Have a forklift, tractor, or skytrack on-site to safely unload from the flatbed trailer.
Bundle handling: Materials come in manageable bundles, but they are still heavy—handle with care.
Safety first: Ensure all hands and feet are clear from under the materials at all times.
Supervise the process: Assign someone to oversee unloading and ensure that the area is free of obstacles.

Handling

Once unloaded, handle the materials carefully, especially the painted surfaces. While durable, dragging sheets across each other or rough surfaces can cause scratches. Lift sheets individually or in small groups to prevent damage. During installation, take extra care to protect the finish and keep your steel building looking great for years.

Assembling

Our DIY steel building kits include easy-to-read instructions. In addition to basic tools, you’ll need:

Equipment to lift materials (rent a tractor or skytrack if you don’t have one)
Extension ladder
Tin snips
Screw gun
Metal cutting blade

Storage

If you can’t assemble the building right away, follow these storage guidelines to protect your materials:

Inspect for damage: Check all bundled sheets for any shipping damage. Report issues to the carrier and note it on the Bill of Lading (B.O.L.).
Store in a dry place: Choose a well-ventilated, dry location for storage.
Break the bundles: Avoid prolonged storage in bundles—break strapping bands to allow for better airflow.
Elevate the materials: Lift sheets off the ground with one end slightly elevated to prevent moisture buildup.
Use proper covering: Cover with a breathable canvas tarp to protect from the elements, but allow air circulation. Avoid plastic tarps, which can cause condensation and lead to corrosion.

If you are considering a steel building kit for your property or have any questions, speak with one of our building specialists today at (800) 825-0316.