15x100 Mini Storage Building

Request An Estimate

Note: Your privacy is very important to us. To better serve you, the form information you enter is recorded in real time.

Thank you! Your project estimate is on its way.

Thank you messaging appears here.

15×100 Mini Storage

The 15x100 metal building package is one of the most popular choices for a self-storage storage building kit. Framed openings, sectional doors, and a column-free interior allow building owners to design a flexible space that can maximize profits. The versatility of our steel structures allows business owners to accommodate the storage needs of a variety of customers. Each mini storage building is also constructed with future expansion in mind.

Price Your Building Online

Framing Detail, Warranties and Service

Brand General Steel
Available Products 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

Self Storage Building System

Our mini storage buildings provide ultimate flexibility. Each building system features expandable interior walls which allows you to create rentable spaces that are tailored to your customer’s needs. You can also create your own color scheme to either blend into surrounding buildings and landscape or select something more bold to attract attention to your self storage business.


  • 26 gauge metal
  • Galvalume PBR roof, with a pre-painted option
  • 5x10 interior column spacing
  • Pre-painted exterior columns and header panels


  • No welding required
  • Options for gutters and downspouts, roof and wall insulation
  • No interior footings required
  • Engineered drawings for permit acquisition, erection and foundations

Frequently Asked Questions

How much does a mini 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 mini storage building?

A preengineered building provides the best value for a variety of reasons, including its clear span framing, which allows for column-free interiors. This gives building owners the ability to maximize units. Another reason is the quick construction timelines allow businesses to get up and running as quickly as possible.

How profitable is a mini storage business?

Depending on building size, unit sizes, and occupancy rates, mini storage businesses have proved to be successful investments for entrepreneurs around the country. As downsizing continues, we expect the industry to continue its consistent growth.

Need help? We're listening.
Let us guide you through your decision.

No matter where you are in the process of building, General Steel has a solution for you. From our simple 3 step building quote to our growing library of project resources, General Steel is the company you've been looking for.

Building FAQs