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About Container Stacking

Modern construction sites are often small, and therefore it is necessary to maximise every bit of space that you have for your site accommodation units by container stacking. Willbox understand this, and that is why we build our units so that they can be double stacked to optimise ground space, and fully utilise the useable area on site.

What units can be stacked?

Willbox have based the majority of our site cabins on the 20’ x 8’ ISO Shipping container. Using shipping container conversions for our site accommodation units means that they are perfect for container stacking as they have an ISO container frame, and ISO corner casts to easily and securely lock the containers together.

Is it safe to stack?

Stacked units are approved on all major construction sites, and many of the main contractors will stack their own units too. We consider our containers and cabins to be the most secure as we use container conversions to ensure the units sit flush on one another, and are therefore completely safe.

How do the staircases work?

Willbox use a 13 tread steel staircase which has a landing platform and steel legs that meet the floor. The landing platform has railings all the way around the sides, and down the steps, and it is connected to the base of the stacked cabin. If you would like to see examples of our double stacked cabins, please click here.

How long does it take to stack?

Depending on the space to manoeuvre on site, it should take under 1 hour to fully stack the units and assemble the staircase. Our drivers are fully trained to operate the Hiab crane vehicle (required for loading and off-loading the cabins) and they have many years’ experience stacking cabins on site. Our drivers will not leave the site until the stack is safely secured, and the customer is happy with the set-up.

For more information on our site accommodation units, and how we stack our cabins, please don’t hesitate to contact our sales team on 0800 023 5060 or

Thank you for all your hard work and contribution to helping make the day such a memorable success, we couldn't do it without you and your team. Penny Muxworthy Romsey Show
Instead of building a £45,000 extension we purchased 3 containers, and to be honest they are better than the building would have been! Office Manager Haven - Church Farm

Willbox is rated 4.87 stars by based on 181 merchant reviews

4.87 / 5 Rating
181 Reviews
Very helpful staff, and the portaloo hire was problem-free. We would use them again.
A great company to deal with. From initial enquiry through to delivery of container. We dealt with Laura Johns from the Truro branch. Her customer service was excellent. We found her to be extremely efficient and very helpful in ensuring the container hire went through smoothly for us. We would not hesitate to recommend Willbox.
All done as requested with no fuss