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Topper Storage Units for Sale in Great Britain

Maximise Your Self Storage Site with Stackable Topper Units

When land is limited, expanding upwards with topper storage units is the smart choice. Designed to sit securely on top of standard shipping containers, toppers let you increase capacity, serve more customers, and boost revenue – all without acquiring additional land. With the growing self storage demand in Great Britain, topper container units provide a cost-effective, scalable way to grow your business.

What Are Topper Container Units?

A topper unit is a modified shipping container divided into smaller, rentable storage spaces with central walkways for easy access. Some popular options include:

  • 20ft topper unit: one walkway with 8ft units either side.
  • 40ft topper unit: two walkways, each with three 8ft units.
  • Custom configurations: tailored to your site layout and customer needs, including colour.

These stackable container units are engineered for safety, stability, and convenience – unlocking new income streams within your existing footprint.

Watch this short video as our Senior Account Manager, Leanne, showcases a topper unit and explains two access options, personnel doors and roller shutters.

Personnel Door vs Roller Shutter

Personnel Door Access

  • Easy, familiar entry for all users.
  • No bending or lifting required.
  • High security with a heavy-duty door and 10-point locking system.

Roller Shutter Access

  • Fast, convenient access for frequent use.
  • Compact roll-up design for limited spaces.
  • Brings in natural light for a brighter unit.
  • Wide openings make loading bulky items easier.
Interior walkway of a topper container unit with roller shutter storage doors, designed for self storage sites in the GB.

Why Add Topper Units to Your Storage Site?

Topper units are a smart solution for urban and suburban storage operators who need additional capacity but do not have the space or budget to expand outward or acquire more land. They are especially attractive to customers looking for smaller, flexible storage, including:

  • Students needing affordable, short-term space.
  • Young professionals in flats or shared housing.
  • Families with limited home storage.
  • Small businesses needing extra stock or equipment space.

By going upwards, you can increase income per square foot while keeping costs under control. No extra land, staffing, or security is required – just smarter use of the site you already own. Speak to our team to find out more!

Key Benefits of Topper Storage Units

Maximise space – Add storage without new land.

Scale easily – Expand as demand grows.

Boost revenue – Serve more customers per site.

Stand out – Attract new customers and stay competitive.

20ft green topper container unit fitted with a personnel door for secure self storage access.
20ft green topper storage container unit with roller shutter access, ideal for self storage expansion.
Topper storage container units being delivered on a flatbed lorry for installation at a self storage site.
Interior walkway of a topper storage container with roller shutter doors, with a removable balustrade at end of the row.
Close-up view of a white roller shutter unit inside a landing topper container, used for self storage access.
Fingerprint-compatible lock mechanism on a roller shutter topper storage unit door.

Start Growing Your Storage Business Today

Want to grow your site’s capacity and revenue without extra land costs? Request a free topper unit quote today, or explore our StoragePro service – the perfect solution for new and expanding self storage businesses.

         Get My Topper Quote             Discover StoragePro Solutions

Frequently Asked Questions

Can topper storage units be added to any self storage site?
Yes, topper storage units can be installed on most self storage sites, as long as the ground containers sit on a solid, level base. Because topper units are designed to stack securely on top of standard shipping containers, they allow operators to expand capacity without needing extra land. They are particularly effective in urban and suburban locations where space is limited, enabling you to maximise income per square foot while keeping costs under control.

Can topper storage units be customised or personalised to fit my site?
Yes, topper units can be customised to suit your business needs and site layout. Options include bespoke configurations, a choice of colours to match your branding, and variations in walkway design and unit sizes. This flexibility means you can create a tailored storage solution that appeals to your customers.

What is the difference between personnel door and roller shutter access on topper units?
Personnel doors provide simple, secure access with a familiar entry point and a heavy-duty 10-point locking system, making them ideal for everyday users who value ease of use and strong security. Roller shutter doors, on the other hand, offer a wide, convenient opening for moving bulky or heavy items, and their compact roll-up design allows for efficient use of space while bringing natural light into the unit. Roller shutters also come with flexible locking options, including padlocks and finger scan systems, giving operators and customers the choice of the right level of security for their needs.

What is a balustrade on a topper unit and why is it important?
A balustrade is the protective railing installed on the upper level of topper storage units. It provides a safety barrier for customers accessing their units at height, ensuring compliance with health and safety standards. Balustrades can be installed as permanent fixtures or temporary fittings, with temporary options being ideal for operators who want to scale gradually.

Do I need a right-hand or left-hand landing unit when installing topper storage units?
When adding topper units to your site, you may require a right-hand or left-hand landing unit depending on the layout of your facility and the position of stair access. The choice ensures that walkways, staircases, and access routes align correctly with your site’s flow and customer needs. Our team can advise on the best option to make sure your installation is safe, efficient, and easy for customers to use.

Need Help?

Need help deciding which container is best for your requirements? Get in contact with our helpful team, they will be happy to assist.
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