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Modified Shipping Container Conversions,
Built In-House

At Storage on Site, our container conversion service is handled entirely in-house, from the initial design stage through to final build and delivery. As a family-owned business with over 55 years of experience, we’ve built a reputation for quality, reliability, and innovative design.

Our skilled team of modification specialists and fabricators collaborate using CAD technology and hands-on craftsmanship to bring your vision to life. Whether you require practical builds like multi-door units, or creative spaces such as bars, ticket booths, or classrooms, we deliver custom-built solutions crafted to your exact specifications.

From the initial consultation to the final handover, we’ll guide you through every stage, offering expert advice and ensuring clear, consistent communication throughout the process. Start your container transformation journey today by completing our contact form, or give our helpful team a call today on 023 8033 2266.

Fast delivery with SOS owned trucks, no 3rd parties
No hidden extras • Family-owned business • Price guarantee
Ordering a container conversion with SOS is easy. Complete the form below to get started.

Bars & Food Stalls

Ready-to-serve setups for festivals, events, or permanent venues.

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Ticket Booths & Kiosks

Compact and secure units designed for high-traffic use.

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Self-Contained Classrooms

Fully fitted spaces for learning in any location.

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Garden Rooms

Stylish retreats for
work or relaxation.

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Garages & Workshops

Secure spaces for vehicles, tools, and equipment.

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Toppers

Make the most of vertical space on your self-storage site.

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Multi-Door Units

Adapted for unique access and stacking requirements.

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Welfare Units

Practical solutions for construction and industrial sites.

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Roller-Shutter Units

Quick, hassle-free access for frequent loading.

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Joined Units

Open-plan spaces created by combining multiple containers.

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Timber Clad Containers

Stylish timber finish for a softer, more natural exterior look.

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Home Offices

Insulated, powered workspaces for home or garden use.

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perfect for
Construction
Self Storage Centres
Shipping & Marine
Education
Retail & Warehousing
Hotels & Hospitality
Farming & Agriculture
Home Offices
Diversification Projects
Catering
General Storage
And much more!

It's simple to order with SOS.
Here's the simple 4 step process...

1. Make an enquiry

Call us on 023 8033 2266 or use an enquiry form, providing your requirements.

2. We’ll contact you

One of our experts will contact you to discuss your options, provide advice and confirm your cost.

3. Delivery date confirmed

After discussing the details and on your approval, your order is booked and delivery is confirmed.

4. You receive your order

Your order will be shipped to you on your confirmed delivery date and placed exactly where required, easy!

Why choose SOS?

✅  Family-Run, Customer-First Approach
✅  Own Fleet, Point-to-Point Delivery
✅  Expert Guidance & Professionalism
✅  Fast, Flexible Delivery Across the South UK
✅  Quality, Security & Cleanliness
✅  End-to-End Solutions (Sales, Hire, Mods)
✅  Wide Range of Container Sizes in Stock Now

Call us today on 023 8033 2266
Storage on Site, Leaders in Containers and Cabins across Southern England.

Frequently asked questions
Container Conversions

What is a container conversion?

A shipping container conversion is a standard shipping container which has been modified. Modifications can include adding doors and windows, roller shutters, electrics and lighting, painting the unit, changing the shape and size of the unit – the opportunities are endless! 

If you are looking for a converted shipping container for sale, our team would be happy to help bring your vision to life. Whether you need a custom cabin for a construction site, smart units to make the most of your self storage site space, or a summer house for your garden, our in-house team of experts are here to make your ideas a reality. Get in touch today by calling 023 8033 2266, or email sales@storageonsite.co.uk for a quote.

How long will my container conversion take?

Upon your initial enquiry, we will provide a timescale for your build and keep you updated throughout the build process. More complicated builds will take longer than simpler jobs, but with a dedicated conversion team, you won’t be waiting long.

Does my conversion need to be a standard size?

Don’t worry, your container conversion doesn’t have to be a standard 10, 20 or 40ft size. Our team can design and build a unit to be any size you need.

Are your container conversions built in-house?

All our container conversions are designed and built entirely in-house by our skilled team of welders and modification specialists. This ensures high quality, precision, and full control over every stage of the process. Niche components of your conversion may be serviced by other trusted professionals, but rest assured, your build will be controlled by SOS from start to finish.

What is container cladding, and why should I consider it for my shipping container conversion?

Container cladding involves covering the exterior of a shipping container. This covering could be decorative or practical, improving the durability or appearance of the unit. A cladded shipping container offers better protection against rust, dents, and wear, which in turn helps maintain its visual appeal.

Cladding a shipping container in wood or timber-look composite is a popular choice for those looking for a more organic or natural aesthetic. At Storage on Site, we have worked with timber cladding on a number of successful container conversion projects, including classrooms and garden rooms.

Will my container conversion meet building regulations?

Yes, our modified containers can be made to meet building regulations. Upon enquiry, let us know what regulations you need to meet, and we can provide a bespoke quote to meet your criteria.

Can my conversion be painted a custom colour?

Yes. We can paint your conversion in any standard RAL colour. If you would like a specific custom colour outside of the RAL range, this can also be arranged. With an in-house paint bay, we can finish your units to a high standard to ensure an aesthetically pleasing final product.

Can my container conversion include electrics?

Yes! Our team specialise in building custom cabins which can include LED lights, heaters, and plug sockets.

How secure are the doors on your container conversions?

Our personnel doors include a 10-point locking system for your peace of mind. Our cargo doors feature a lockbox for secure closure, with heavy duty padlocks available for purchase.

Are your container conversions insulated?

We have many options for insulation, from poly-urethane spray insulation to 50mm Rockwool insulation. Whilst putting together your quote, we will discuss your options to ensure you have the right insulation for your container conversion, ensuring your valued possessions stay as protected as possible from condensation.

Is there a standard I should follow for the positioning of doors and windows in my custom container conversion?

No – doors and windows can be positioned wherever meets the practical and aesthetic needs of your project. If you are unsure, our expert team can help design your unit with your requirements in mind.

Can my container conversion include anti-vandal windows?

Yes. We can fit anti-vandal windows to your container conversion, providing extra security and durability for high-traffic or exposed locations.

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