A shipping container office is one of the fastest ways to add secure, weatherproof workspace on a site, in a yard or in your garden. Instead of waiting months for a brick-built extension, you can have a ready-fitted unit delivered and craned into position. This guide explains what to look for, what it typically costs, and which rules apply in the UK.
Why choose a shipping container office?
- Speed: units are fitted out before delivery, so you are usually working in days rather than months.
- Strength and security: a steel shell is hard to break into and stands up to British weather.
- Portability: a container office can be moved if your site or business changes.
- Flexible sizes: from compact 10ft site offices to 40ft multi-room suites.
Choosing the right size
The 20ft container is the most popular office size because it fits a small team and most delivery lorries. If you need meeting space or separate rooms, step up to a 40ft unit. For a single-person garden office, a shorter container is often enough. Our shipping container sizes guide lists the external and internal dimensions so you can check your space before ordering.
You can see a ready-made option in our 20ft shipping container office, or browse the wider portable buildings and cabins range.
Insulation, heating and ventilation
Bare steel gets hot in summer and cold in winter, and condensation can form on the walls. A comfortable container office needs:
- Insulation to walls, floor and roof (rigid foam or spray foam are common choices).
- An internal lining such as plywood or plasterboard.
- Heating or air conditioning sized for the space.
- Ventilation to manage condensation and keep the air fresh.
Electrics, windows and doors
A typical office fit-out includes a consumer unit, sockets, lighting, windows and a personal door. Electrical work should be carried out and certified by a qualified electrician, and you will need a suitable supply on site. For custom layouts, see our guide to container modifications and custom builds.
Do you need planning permission?
It depends on how the container is used, where it sits and for how long. A permanent office on your land may need planning permission, and Building Regulations can apply if the unit is used as workspace. Always check with your local planning authority first. We cover the basics in our planning permission guide. The government’s Planning Portal has official guidance on permitted development and how to apply.
How much does a shipping container office cost?
Prices vary with size, condition and specification. A basic fitted unit costs far less than a fully finished, air-conditioned multi-room office. For a general idea of container pricing, read our shipping container cost guide and then compare current listings. Delivery is an extra cost, so factor in access and crane requirements; see delivery and installation.
Before you order, measure the delivery route and the final position. A lorry-mounted crane needs clear access and firm, level ground, so check for overhead cables, narrow gateways and soft verges. Most buyers place the unit on a prepared concrete base or on pad foundations, which keeps the floor level and the doors working properly. If your container office will be used all year round, think about power too: a qualified electrician should connect the unit to your supply, and you will need a protected circuit for sockets and lighting. Planning these details early avoids delays on delivery day and helps you compare quotes like for like.
Frequently asked questions
Can I use a shipping container as an office?
Yes. With insulation, lining, electrics and ventilation, a container makes a comfortable and secure office. Check planning and Building Regulations for your site.
How big is a 20ft container office inside?
Internally a 20ft container is roughly 5.9m long and 2.35m wide before the fit-out lining is added, so usable space is slightly smaller.
Do container offices need planning permission?
Often yes for permanent use, but it depends on your local authority and the use. Always confirm before ordering.
How long does delivery take?
Delivery time depends on stock, specification and your location. Contact us for a quote based on your postcode.
Ready to see your options?
Browse our container offices or contact our team for help choosing the right size and specification.
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