Topper Storage Units for Sale

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 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.

A dark green topper container with vertical ridges sits on a concrete surface outdoors. One side of the container has a large rectangular cutout revealing a white roll-up door inside. The container is located in a fenced area with trees and another green container visible in the background, suggesting a secure or industrial setting.
Double Your Self Storage Capacity Without Extra Land

Access Options: Personnel Door vs Roller Shutter

Personnel Door Access – From £6,295

  • 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 – From £5,680

  • 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.
Close-up view of a green steel shipping container with corrugated sides, featuring a topper unit with a central doorway and an internal white roller shutter door. The container is placed on a concrete surface outdoors under a partly cloudy sky.
Close-up of a metallic lock mechanism mounted on a white roller shutter door. The lock features a rectangular design with a fingerprint scanner and key slot, secured by four screws on the shutter’s corrugated surface.
Green topper unit with a central doorway leading to a white personnel door fitted with a silver handle. The container is placed outdoors on a concrete surface, with a car and trees visible in the background under a partly cloudy sky.

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!

Green steel shipping container (topper unit) with corrugated sides, featuring a central opening that leads to an interior passage. The container is placed outdoors on a concrete surface, with other containers and a building visible in the background under a clear blue sky.
Green topper unit with a central doorway revealing a white roller shutter door inside. The container is placed on a concrete surface outdoors, with a metal fence and clear blue sky in the background.
Two green steel shipping containers with side openings, branded with ‘S Jones Containers’ logo and contact number, loaded on a red flatbed trailer attached to a white Volvo truck. The scene is outdoors on a concrete surface near industrial buildings under a cloudy sky.
Interior view of a container unit showing a white roller shutter door on the left and an open doorway leading to another section of topper storage with dark flooring.
Interior corridor of a container unit with multiple roller shutter doors on both sides, leading to a bright yellow balustrade at the far end.

Key Benefits of Topper Storage Units

Maximise
space

Add storage without new land.

Boost
revenue

Serve more customers per site.

Scale
Easily

Expand as demand grows.

Stand
out

Attract new customers and stay competitive.

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.

S Jones Containers forklift truck stacking shipping containers at the Aldridge, Walsall depot for container hire and storage solutions

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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 fully 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.

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.

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.

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. 

Some of Our Valued Customers

What Our Customers Say

Patrick26th November 2025

Unfortunately our delivery was delayed by several hours but the driver made up for lost time, he was very polite and proffessional and sited the container inch perfect.

Rose25th November 2025

I was treated extremely well they took care of what I needed without any fuss.

Nancie24th October 2025

I cannot thank the staff at S Jones Containers enough. Everyone I spoke to went over and above to help. The containers were ordered and delivered in a very timely manner. We were kept informed at all times. The containers arrived at the time expected and were very easy to install. Thank you to everyone at S Jones Containers. I would highly recommend this company, it was a pleasure doing business with them.

Christine1st August 2025

Shazia was helpful from my first enquiry to the delivery of my container. She sorted any query and enabled me to buy exactly what I was looking for. The driver who delivered container was also a credit to his company. Nothing was too much trouble and everything done with a smile .

Phil20th June 2025

Got in touch with Shazia at the depot she organised everything delivery was a bit worrying as the area was tight but the delivery guy was amazing and got them exactly where we wanted them ,, all a very good service provided