Industry Leader for Over 44 Years

Mini Storage Building Construction

We’d like to establish right up front that, while some assembly is required, you don’t need to learn Swedish before tackling our self-storage unit construction.

Nationwide Shipping

45+ Year Warranty

44 Years in Business

From packaging and labeling each bundle for easy identification to providing detailed erection drawings and a step-by-step guide, we make the mini storage construction process smooth and stress-free. Whether you’re working with experienced mini storage contractors or handling the build yourself, our team is here to guide you every step of the way.

mini storage steel building kits

Streamlined Building Kits for Faster Assembly

Our steel mini storage construction kits save time and labor while maintaining exceptional quality. Every kit includes:

  • Heavy-duty steel frame
  • Wall and roof panels
  • Partition panels
  • Metal trim
  • Hardware and fasteners
  • Complete erection drawings

You can also add insulation packages to prevent condensation and improve energy efficiency — an especially valuable feature for climate-controlled storage.

Expert Support From Start to Finish

With over 30 years of experience in the metal storage building construction industry, we bring unmatched know-how to your project. Our experts are available to answer your questions at any stage, ensuring your building process is as straightforward as possible. We also offer various door options, color selections, and customizable layouts to match your property’s needs. Whether you require specialized units for boat storage, RV storage, or climate-controlled facilities, we’ll help create a design that attracts tenants and maximizes rental income.

RV storage under construction
self storage box store building conversion interior showing unit doors

New Builds and Indoor Conversions

In addition to new outdoor self-storage unit construction, we can facilitate complete indoor conversions, transforming existing buildings into profitable storage facilities. By offering both options, we give you the flexibility to invest in a solution that fits your market and property.

Foundations Built for Longevity

A strong foundation protects your investment. Most mini storage construction projects involve pouring a foundation slightly larger than the building footprint to allow for a 1 1/2″ notch around each side, helping prevent water intrusion. 

Example: A 20′ x 100′ unit requires a foundation poured at 20′ 3″ x 100′ 3″. The notch is set lower than the finished floor, and roll-up doors close flush with the threshold for a weather-resistant seal. Floors are typically 4″ thick with reinforced edges for added stability.

Note: Foundation design should be handled by a qualified engineer. Soil type, location, and local codes all impact the design, and these costs are not included in building kit pricing unless noted.

Mini Storage Building Foundation

Self Storage Unit Construction Made Simple

With Mini Storage Outlet’s proven process, durable steel kits, and expert guidance, you’ll have everything you need to launch quickly and operate successfully. From the first blueprint to the final bolt, we’re your partner in building a business that lasts.

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