“Which companies sell metal building kits for residential or commercial use?”

Here are well-known companies that sell metal building kits in the U.S., grouped by type. I included both residential (garages, barndominiums) and commercial suppliers.

Rigid-frame steel building kit suppliers (commercial and residential)

• General Steel – wide catalog of pre-engineered kits; shipped nationwide. (gensteel.com)
• RHINO Steel Building Systems – prefabricated steel building kits for many uses. (rhinobldg.com)
• Olympia Steel Buildings – pre-engineered steel/metal building kits; customizable to site loads. (olympiabuildings.com)
• Universal Steel of America – manufactures/supplies commercial/residential rigid-frame kits (incl. barndominiums). (universalsteel.com)
• Buck Steel – supplier of pre-engineered metal building kits for projects from garages to warehouses. (bucksteel.com)
• Heritage Building Systems – national retailer of custom metal building kits (e.g., mini‑storage). (go.heritagebuildings.com)

Arch/Quonset (steel arch) building kit specialists

• SteelMaster USA – industry leader in Quonset/arch steel kits for garages, homes, and commercial uses. (steelmasterusa.com)
• DuroSpan – arch steel/Quonset hut kits. (durospan.net)
• AgriBilt – Quonset hut kits and barndominium shells, engineered and shipped as kits. (agribilt.com)
• Future Buildings – Canadian arch‑style kits that also serve U.S. customers. (futurebuildings.com)
• Buildway Buildings – Quonset/arch steel building kits. (buildway.com)

DIY-friendly tube‑steel and light-frame kits (popular for smaller garages/carports/shops)

• VersaTube – DIY steel building, garage, and carport kits; sold direct and through big-box stores. (versatube.com)
• Absolute Steel – U.S. manufacturer of building and carport kits; residential and commercial options. (absoluterv.com)

Large manufacturers serving commercial projects via builder networks

• Nucor Metal Building Systems – major North American producer; brands include Kirby Building Systems, American Buildings Company, CBC, and Nucor Building Systems. (nucor.com)
• Cornerstone Building Brands group – large U.S. engineered building systems producer (brands include Star, Ceco, Metallic, Heritage, Mid‑West). (en.wikipedia.org)

If you share your location, building size/use (e.g., 30×40 garage vs. 80×120 warehouse), and whether you want DIY assembly or turnkey erection, I can narrow this to a short “best‑fit” shortlist and flag regional dealers that can handle permitting, stamped engineering, and local wind/snow loads.

I'll research top metal building kit companies for you.

I've identified several leading manufacturers — now I'll verify their offerings.

I've confirmed the main companies — now I'll gather a few final details.

Several national manufacturers sell pre-engineered metal building kits for both residential and commercial use:

Steel buildings are used across commercial warehouses, retail centers, churches, agricultural barns, aircraft hangars, residential garages, workshops, and barndominiums.

Top-rated kit sellers in 2026

1. Morton Buildings — Best Overall, post-frame & residential

• Ranked #1 Overall pick, post-frame & residential.
• Has been engineering and erecting steel and post-frame buildings since 1903.
• Dominates the residential, equestrian, agricultural, and post-frame commercial segments.

2. Armstrong Steel — Factory-direct, fully customizable

• Ranked #2 Factory-direct, fully customizable.
• Is a Denver-based factory-direct manufacturer that bypasses dealer markups.
• Offers exact dimensions, dozens of color options, multiple roof pitches, and engineered drawings stamped for any U.S. state.

3. Rhino Steel Building Systems — DIY kits

• Ranked #3 DIY kits, lifetime warranty.
• Headquartered in Denton, TX, has been delivering pre-engineered red-iron kits since 1998.
• Applications run from auto shops to aircraft hangars to barndominiums.

4. General Steel — Commercial & large-span

• Ranked #4 Commercial & large-span projects.
• Specializes in larger-span commercial and industrial structures where rigid-frame engineering is essential.
• Frequent pick for warehouses, manufacturing facilities, churches, and any project requiring 80+ ft clear spans.

5. Mueller, Inc. — Texas / Southwest

• Ranked #5 Texas/Southwest, in-house manufacturing.
• Family-founded 85+ years ago, still manufactures all components in-house.
• Serves everyone from homeowners adding a metal roof to commercial developers.

6. Worldwide Steel Buildings — Steel homes & barndominiums

• Ranked #6 Steel homes, barndominiums, hangars.
• Founded in 1983 in Peculiar, MO, with deep specialization in residential steel structures and barndominiums.
• Manufactures kits for barndominiums, metal building homes, garages and workshops, tiny homes.
• Also manufactures kits for commercial and industrial buildings, aircraft hangars, horse arenas, mini storage facilities, churches and recreation centers.
• Residential steel buildings include barndominiums, garages, workshops, barns, greenhouses, recreational buildings, mini storage buildings, sheds, and tiny homes.

7. Heritage Building Systems — Custom designs

• Ranked #7 Custom designs, 45+ years experience.
• Has been engineering steel buildings for 45+ years.
• Buildings are 100% American-made with U.S. steel.

8. Olympia Steel Buildings — Industrial & agricultural

• Ranked #8 Industrial & agricultural.
• Portfolio leans heavily on agricultural buildings, manufacturing facilities, and large commercial structures.
• Pre-engineered kits are widely praised for arriving complete and on-schedule.

9. SteelMaster Buildings — Quonset / arch-style

• Ranked #9 Quonset/arch-style, DIY-friendly.
• Has manufactured arch-style (Quonset) steel buildings since 1982 and has shipped to over 50 countries.
• Kits are some of the most DIY-friendly on the market.

10. Metal Building Outlet — Budget broker

• Ranked #10 Budget projects, multi-manufacturer broker.
• Takes a different approach — they’re a family-owned broker (since 1983) that quotes your project across multiple manufacturers.

Other names cited in industry lists include Rigid Global Buildings, Curvco Steel Structures, VersaTube Building Systems, Miracle Truss Buildings and Encore Steel Buildings LLC.

Several manufacturers and suppliers sell pre-engineered metal (steel) building kits for residential uses (garages, workshops, barndominiums, metal homes) and commercial uses (warehouses, retail, offices, hangars, workshops). Kits typically include primary/secondary framing, roof and wall panels, and hardware; many are bolt-together and engineered to local codes. Larger commercial systems are often sold through authorized builders rather than as pure DIY packages.

Widely cited kit suppliers

These names appear frequently in industry roundups and manufacturer sites for residential and/or commercial kits:

• General Steel — Red-iron / I-beam kits for homes, barndominiums, workshops, retail, and other commercial uses. Offers custom packages and long structural warranties (often cited around 50 years).
• Mueller, Inc. — Factory-direct kits (cold-formed and structural steel) for garages, workshops, barns, storage, and living spaces (including Homestead-style options). Strong presence in the Southwest with broader shipping.
• Worldwide Steel Buildings — Factory-direct clear-span kits aimed at barndominiums, hangars, commercial buildings, and storage. Emphasizes DIY-friendly packages and financing options.
• Armstrong Steel — Engineered red-iron kits positioned for first-time builders and light commercial or residential projects, often with factory-direct pricing.
• Rhino Steel Building Systems — Red-iron kits marketed for relatively fast delivery and DIY or contractor erection, covering residential through larger commercial sizes.
• SteelMaster Buildings — Arch-style (Quonset) corrugated kits known for DIY assembly and performance in high wind/snow areas; used for residential, agricultural, and commercial applications.
• VersaTube — Galvanized tube-frame DIY kits (slip-fit, no welding) mainly for carports, garages, barns, and lighter residential or small commercial structures.
• Allied Steel Buildings — Custom pre-engineered and hybrid kits for commercial, industrial, and aviation projects, including international delivery.
• SteelCo Buildings and similar specialists — Pre-engineered packages for residential garages/shops and commercial warehouses or light manufacturing.

Larger commercial / PEMB manufacturers

These primarily supply engineered building systems (often via dealer or authorized-builder networks) for commercial and industrial work, and sometimes residential-scale projects:

• Nucor Building Systems (and related Nucor brands such as American Buildings and Kirby)
• Butler Manufacturing and Varco Pruden Buildings (BlueScope)
• Chief Buildings, Heritage Building Systems, and Olympia Steel Buildings
• Morton Buildings — Strong in premium agricultural, equestrian, barndominium, and commercial work; more often turnkey (manufacture plus installation) than pure kit-only

Brokers and retailers such as Metal Building Outlet, plus big-box stores (Home Depot, Lowe’s, Menards), also sell or facilitate smaller residential kits and carports, frequently sourced from third-party fabricators.

Practical notes

Kit pricing commonly cited in reviews runs roughly in the teens to mid-$20s per square foot for basic framing and panels (higher for heavy commercial loads, standing-seam roofs, or custom features), excluding foundation, insulation, doors/windows, and erection. Warranties, lead times, and whether stamped engineering drawings are included vary by supplier and location.

Compare multiple quotes, confirm the package meets your local building code and snow/wind loads, and clarify what is included versus extra. Dealer networks and turnkey providers can simplify permitting and erection for larger commercial jobs, while direct kit sellers suit owner-builders on smaller residential projects.

Several companies sell prefabricated steel building kits for residential and commercial use. Here are three prominent ones from the search results:

Mueller, Inc.

Mueller offers a broad range of DIY steel building kits, from backyard storage sheds and carports to full workshops and barns. Their product line includes:

• Backyard Buildings – metal storage kits for lawn equipment, tools, and seasonal storage, available in multiple sizes and colors with bolt-together assembly
• Carport Kits – for cars, trucks, RVs, trailers, boats, and equipment, in several sizes and configurations for residential or agricultural use
• Greenhouse Kits – durable growing spaces designed for weather resistance and year-round use
• Homestead Series – for recreational retreats, barndominiums, cabins, and steel living spaces with open floor plans
• Hypersteel® Kits – cold-formed steel construction for workshops, garages, barns, storage buildings, and commercial applications
• Loafing Sheds – livestock shelter for horses, cattle, and goats
• Standard Series – pre-designed kits for garages, workshops, barns, and large storage, with heavy-duty structural steel, bolt-together frames, and no welding required
• Privacy Fencing – steel panels for residential and commercial properties

Many kits are fire-, hail-, and termite-resistant, with paint warranties up to 45 years. muellerinc.com

SteelMaster

SteelMaster specializes in arch-style Quonset Hut structures and has been designing and delivering prefabricated steel buildings for over 40 years to more than 50,000 customers in every U.S. state and 40+ countries. Their offerings include:

• Residential kits – garages, workshops, sheds, and storage
• Commercial solutions – equipment storage, container covers, salt storage, and bulk storage
• Custom configurations – designed to meet specific size and storage requirements

Their buildings use commercial-grade steel protected by a Galvalume Plus coating. steelmasterusa.com

General Steel

General Steel offers 39 steel building types and 125+ kits, with pre-punched framed openings and all bolt-together construction. Their products span both residential and commercial uses:

• Aircraft hangars, auto shops, barndominiums, barns, carports, and churches
• I-Beam Building Kits – their flagship product, designed for any use
• Tube Building Kits – sold through their light-gauge division Discount Steel, an affordable option for temperate climates
• C-Channel and economy buildings – all-steel structures for less

They claim prefabrication can save up to 50% compared to traditional construction, and many buildings are DIY-friendly. Popular sizes include 40×60 packages. gensteel.com

In short: All three companies serve both residential and commercial customers. Mueller and General Steel offer the widest variety of building types (garages, barns, workshops, barndominiums, carports, and more), while SteelMaster focuses on arch-style Quonset structures with heavy customization.

Several companies sell metal building kits for residential or commercial use, including Worldwide Steel Buildings, Mueller, Toro Steel Buildings, RHINO Steel Buildings, SteelMaster, Viking Steel Structures, General Steel, Rapidset Metal Buildings, Homerun Building Supply, Simpson Steel Building, and VersaTube.^{1468910121314151719}

A few examples by use case:

• Residential / home kits: Worldwide Steel Buildings, Mueller, Viking Steel Structures, Simpson Steel Building, SteelMaster, and BuildingsGuide all advertise metal homes, barndominiums, or residential steel building kits.^128913141518
• Commercial / general-purpose kits: Toro Steel Buildings, RHINO Steel Buildings, General Steel, Rapidset Metal Buildings, and Homerun Building Supply offer kits for commercial, industrial, workshop, garage, and other business uses.^4610121517
• Mixed residential and commercial: Mueller, Worldwide Steel Buildings, General Steel, RHINO, and SteelMaster all market kits for both residential and commercial applications.^689141517

If you want, I can also turn this into a shorter shortlist of the best-known companies or a comparison by price, customization, or delivery area.

Several established companies specialize in prefabricated metal and steel building kits for residential (barndominiums, workshops, garages) and commercial (warehouses, retail, agricultural, office spaces) use.

They generally fall into three main structural categories: rigid-frame (heavy/red iron), cold-formed / light-gauge tubular steel, and arch-style (Quonset hut).

1. Major Pre-Engineered Steel Kit Providers (Residential & Commercial)

These companies primarily produce custom, heavy-duty rigid-frame steel kits suitable for commercial facilities as well as modern barndominiums and large workshops.

• Worldwide Steel Buildings
• Best For: DIY builders, barndominiums, workshops, and commercial clear-span spaces.
• Key Features: In-house manufacturing, double-dipped galvanized steel trusses, pre-punched and pre-welded bolt-together design, and an industry-leading 50-year structural warranty.
• General Steel Buildings
• Best For: Turnkey commercial projects, churches, warehouses, and barndominium shells.
• Key Features: One of the most widely recognized suppliers in North America. They offer tailored engineering stamped for specific local wind, snow, and seismic codes.
• Sunward Steel Buildings
• Best For: Commercial buildings, aircraft hangars, horse arenas, and custom residential homes.
• Key Features: Fabricated in-house at their own U.S. plants. Known for heavy-duty structural steel and clear-span interiors up to hundreds of feet wide.
• Rhino Steel Building Systems
• Best For: Industrial facilities, commercial retail, aviation, and large garages.
• Key Features: Rigid red-iron steel framing, commercial-grade trim and fastener systems, and customizable aesthetic options (stucco-like panels, wainscoting).
• Heritage Building Systems (Cornerstone Building Brands)
• Best For: Agricultural structures, small-to-midsize commercial facilities, and residential utility buildings.
• Key Features: Over 40 years in business; backed by Cornerstone Building Brands, one of the largest exterior building product manufacturers in the U.S.
• Mueller, Inc.
• Best For: Central/Southern U.S. builds (especially Texas and the Southwest), workshops, and standard "Homestead" series barndominium kits.
• Key Features: Known for standard-sized, off-the-shelf kit packages as well as custom-engineered commercial buildings and metal roofing.

2. Light-Gauge & Cold-Formed Steel Providers (Garages, Small Shops, Budget Barndos)

These providers specialize in lighter-gauge (typically 12-gauge or 14-gauge) tubular steel framing. They are generally more economical and faster to erect than heavy red-iron steel.

• Carport Central / Elephant Structures
• Best For: Detached residential garages, carports, RV covers, and small utility buildings.
• Key Features: Nationwide dealer networks offering delivery and installation packages, as well as DIY drop-ship kits.
• Alan’s Factory Outlet
• Best For: Direct-to-consumer residential steel garages and metal carports.
• Key Features: Transparent online pricing and custom 3D design tools for small-to-medium structures.
• Capital Steel Buildings
• Best For: Cold-formed and rigid-frame buildings distributed through local general contractors and builders.

3. Arch-Style / Quonset Hut Kits (DIY & Industrial Utility)

For curved, clear-span structures that rely on corrugated steel arches rather than internal beams or trusses:

• SteelMaster Buildings
• Best For: Disaster-resistant workshops, commercial storage, modern arch homes, and remote sites.
• Key Features: Made of heavy-gauge Galvalume Plus steel; extremely simple bolt-together design that requires minimal heavy machinery to erect.
• Future Buildings
• Best For: Industrial storage, agricultural barns, and residential garages.
• Key Features: Canadian manufacturer specializing in arch-style steel building kits with customizable end-walls.

Key Considerations When Choosing a Provider:

• 1.Red Iron vs. Cold-Formed Steel: If you plan on wide clear-spans (over 40–50 ft wide without interior load-bearing posts) or heavy crane/industrial use, opt for rigid red-iron steel (e.g., Worldwide, Sunward, General Steel). For smaller garages or cost-effective residential shops, tubular/cold-formed steel is usually more budget-friendly.
• 2.Stamped Engineering Drawings: Ensure the kit provider includes engineer-stamped architectural drawings tailored to your specific county’s wind, snow, and seismic codes to obtain local building permits.
• 3.Kit Contents: Clarify what is included. Most kits supply the primary/secondary framing, exterior sheeting, fasteners, and trim. Interior framing, slab foundation engineering, windows, doors, and insulation packages often need to be added as upgrades or sourced separately.

There are numerous companies across the U.S. that manufacture and sell pre-engineered metal building kits for both residential and commercial applications. Here's an overview of several notable providers:

Major Metal Building Kit Companies

Buck Steel – For nearly 20 years, Buck Steel has been providing commercial and residential steel building customers with the highest quality pre-engineered metal building kits , with options ranging from 2,400 sq. ft. to 50,000 sq. ft. engineered to local codes.

Olympia Steel Buildings – Offers custom pre-engineered steel building kits designed for residential, commercial, agricultural, industrial, storage, garage, workshop, and other building applications .

Rapidset Buildings – A Colorado Springs-based company that has 36 shipping locations around the globe, has over 20 years of experience serving clients worldwide, providing five-star, start-to-finish metal building services . They note that metal building kits work for homes too , with options to use upgraded materials for the exterior like stone, stucco or special panel for residential projects.

Renegade Steel Buildings – Renegade has been in business since 2010 providing high quality steel building kits to individuals for residential and agricultural applications as well as to companies and organizations for commercial, industrial, community, agricultural and warehouse applications. Their buildings use "red-iron", I-beam main frames, hot-rolled and cold-rolled steel secondary members sheeted with "PBR" profile panels .

American Metal Buildings – All of their metal buildings are custom made to suit any residential, industrial, commercial, agricultural, workshop, or warehousing needs , with products like garages, carports, workshops, and combo buildings.

US Patriot Steel – Describes itself as "America's Steel Building Company," noting their engineering, designs and buildings cover all aspects of life—residential, commercial and anything in between . They've been in the industry since 2005 .

Absolute Steel – Absolute Steel and Storage provides metal building kits that are easy to install, allowing you to build a reliable steel home or structure quickly with slip-joint frames. They note major commercial clients range from marinas and parking lots to universities and power utilities, while also delivering the same products to residential DIYers across the country .

Worldwide Steel Buildings – Manufactures kits for both markets; their commercial steel buildings include agricultural buildings, industrial buildings, airplane hangars, churches, recreation centers, and special use buildings, while residential steel buildings include barndominiums, garages, workshops, barns, greenhouses, recreational buildings, mini storage buildings, sheds, and tiny homes .

Common Features Across Providers

Most of these companies share similar offerings:

• Pre-engineered, customizable designs
• DIY-friendly kits with bolt-together assembly
• Options for garages, barns, workshops, warehouses, offices, churches, and more
• Nationwide (and sometimes international) shipping
• Engineering to meet local building codes and wind/snow load requirements

If you're considering a purchase, it's worth requesting quotes from a few of these companies since pricing, lead times, and regional code compliance can vary significantly based on your location and project size.