30x40 Storage

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30×40 Storage Building

The 30x40 metal building package is one of the most popular choices for those looking for significant storage space. With 1,200 square feet at your disposal, you can safely store multiple cars, boats, or a Class A RV. The clear span framing of our structures allows you to maximize your space, offering plenty of room for equipment or a business fleet. Your options are endless, and you’ll work with our experienced team to find the right fit.

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Framing Detail, Warranties, and Service

Brand General Steel
Available Products I-Beam Framing: 26 Gauge Sheeting, C-Channel Framing: 26 Gauge Sheeting
Add Colors Roof, Walls and Trim
Structural Warranty 50 Years
Paint Warranty 40 Years
Standing Seam Roof Warranty 25 Years
Galvalume Roof Warranty 20 Years
Project Coordinator Included at No Additional Cost

Popular Storage Building Components

General Steel’s metal building kits are perfect solutions for those in need of storage space. General Steel’s wide selection of components gives building owners control of the final product. In addition to the primary and secondary framing, it can add a combination of framed openings, sectional doors, roll-up doors, windows, and more. Also, consider adding GenStone faux stone siding or an exterior color scheme for aesthetic purposes.


  • Primary and Secondary Framing
  • 1:12 Roof Pitch
  • 26 Gauge Roof and Wall Sheeting
  • Fasteners
  • Sealants and Flashing
  • Deluxe Trim Package
  • Ridge Cap
  • Plans and Drawings


  • 3070 Man Door
  • Sectional Door
  • Roll Up Door
  • Horizontal or Vertical Slide Windows
  • Insulation
  • Light Transmitting Panels
  • Insulated Stucco Panels
  • Gutters and Downspouts

Frequently Asked Questions

How much does a metal storage building cost?

There are three factors that affect the price of your building. The first is design, which includes all of the custom features that you choose. The second is the price of steel, which can fluctuate daily based on the market. The third is economies of scale, which affects the price per square foot.

Why is a preengineered building the best choice for a storage building?

A pre engineered building provides the best value due to its clear span framing, which allows for column-free interiors. This gives you the most space possible at the lowest price.

Do I need a garage or a storage building?

These terms can be used to describe the same thing, but generally, a storage building is larger and used for more than just vehicles. Prefab storage buildings can be used for warehouse operations, agricultural operations, RV storage, furniture storage, and any other valuable goods that require safe and reliable storage.

Digital Downloads

30x40 Storage Building Brochure

Our storage building packages come with an impressive list of standard features and warranties. Explore popular components, color choices and reasons why a General Steel building is the right choice.

Building Brochure

Standard Features Infographic

From the primary and secondary framing to the fasteners, sheeting, sealants, and pre-punched components, this is what makes a General Steel metal building system the most durable building available.

Standard Building Features

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