Container Site Office 2.4 × 6 m
2.40 × 6.00 m · H 2.64 m
- 20ft footprint
- Fits standard transport
- Office or canteen
£3,490 + VAT
£4,188 inc VAT
Temporary and permanent
Modular buildings for sale in the UK
Offices, classrooms, canteens and accommodation built from insulated steel modules, factory-built to order. Buy a single 3 × 7 m module or join several into a larger building — prices online and a drawing with every quote.
- From £3,490 + VAT
- Bolted galvanised steel frame
- Temporary or permanent
- ISO 9001:2015 production
Prices online
Sizes and prices
Prices are shown + VAT, the way trade buyers expect, with the inc-VAT figure underneath. Delivery is quoted by postcode with your written quote.
Container Room 3 × 6 m
3.00 × 6.00 m · H 2.64 m
- 18 m² room
- Office, studio or gym
- Insulated sandwich panels
£4,290 + VAT
£5,148 inc VAT
Container Office 3 × 7 m
3.00 × 7.00 m · H 2.64 m
- 21 m² open plan
- Two windows and a door
- Our most-built size
£4,290 + VAT
£5,148 inc VAT
Container Office with WC 3 × 7 m
3.00 × 7.00 m · H 2.64 m
- Office plus WC
- Plumbed on-surface
- Site office favourite
£4,890 + VAT
£5,868 inc VAT
Two-Room Container with WC 3 × 7 m
3.00 × 7.00 m · H 2.64 m
- Two rooms and a central WC
- Office + meeting room
- Or accommodation
£5,190 + VAT
£6,228 inc VAT
What is a modular building?
A modular building is made in a factory as a set of finished modules — frame, walls, roof, floor, windows and electrics — then delivered and joined on site. Because most of the work happens indoors, the building spends days or weeks on site rather than months, and the price is agreed in a written quote before production starts.
Our modules use a bolted galvanised steel frame with insulated sandwich-panel walls and roof. One module is a room in its own right. Set side by side or stacked, modules become offices, classrooms, canteens or accommodation. You will also hear them called prefabricated buildings, portable buildings or temporary buildings: the build is the same, and the difference is how long the building stays and whether it is ever moved.
Modular buildings are bought by contractors who need a site office, schools adding classrooms, farms housing seasonal staff, councils and charities that need space quickly, and businesses that want a modular office without a building project. Modular buildings come in three systems:
- Container modules: our main modular building system, with footprints of 2.3 × 6 m, 2.4 × 6 m and 3 × 4 m up to 4 × 12 m. Delivered assembled or flat-packed, and joined side by side into larger buildings; blocks can stack to two storeys.
- Flat-pack panel cabins: the same insulated panels as a kit that bolts together on site, 2.80 m high — see flat pack cabins.
- GRP cabins: one-piece moulded units up to 2.7 × 2.7 m for gatehouses, kiosks and small offices — see GRP kiosk cabins.
Modular building prices
Prices below are for single modules, ex works, + VAT. A small building can be a single module; larger buildings join several and are priced from a drawing of your layout. Delivery by crane lorry is quoted for your postcode in your written quote.
| Module | Footprint | Floor area | Height | Price + VAT |
|---|---|---|---|---|
| Container site office (20ft) | 2.40 × 6.00 m | 14.4 m² | 2.64 m | £3,490 |
| Container room | 3.00 × 6.00 m | 18 m² | 2.64 m | £4,290 |
| Container office, open plan | 3.00 × 7.00 m | 21 m² | 2.64 m | £4,290 |
| Container office with WC | 3.00 × 7.00 m | 21 m² | 2.64 m | £4,890 |
| Two rooms with a central WC | 3.00 × 7.00 m | 21 m² | 2.64 m | £5,190 |
Modular offices, classrooms and accommodation
Modular buildings are used in four main ways. Each starts from the same module, so you can mix them on one site: an office with a WC, a canteen beside an office, or two classrooms side by side.
- Modular offices: an open-plan 3 × 7 m module, an office with WC, or several modules joined for meeting rooms. For a single unit see portable office cabins; on construction sites see site cabins.
- Classrooms and schools: from one portable classroom to multi-classroom modular school buildings.
- Accommodation: staff and seasonal worker housing — see farm workers accommodation.
- Gatehouses and kiosks: GRP and composite cabins for site entrances — see security gatehouses.
Materials, kits and specification
Every module has the same core build, whether it arrives assembled or as a flat-pack kit. The frame is galvanised steel, bolted rather than welded, so the building can be taken apart and re-used many times. Walls and roof are sandwich panels: an insulating core between two steel skins, finished with powder-coated steel.
- LED lights and sockets are fitted in the factory; an electrician connects the incoming supply on site.
- The panels carry up to 60% more insulation than standard panels, and the buildings are rated 100% recyclable with 35% less carbon.
- Where access is tight, modules can come flat-packed and bolt together on site — see flat pack cabins.
- Options confirmed in your written quote: extra windows, internal walls, a WC, a kitchen sink, heating, cladding and external colour.
| Specification | Standard module |
|---|---|
| Frame | Galvanised steel, bolted (not welded) |
| Walls | 50 mm EPS sandwich panel; PUR or rock-wool panel option |
| Roof | 125 mm EPS insulation |
| U-values | Walls 0.46 W/m²K, roof 0.26 W/m²K |
| Floor | 2 mm PVC vinyl on 14 mm cement board |
| Floor loading | 200 kg/m² |
| Snow load | 80 kg/m² |
| Windows | PVC, double glazed, 90° opening |
| Finish | RAL 9002 powder-coated steel; metal parts RAL 1019 |
| Height | 2.64 m (flat-pack cabin 2.80 m) |
| Footprints | 3 × 4 m to 3 × 12 m, 4 × 4 m to 4 × 12 m, plus 2.3 × 6 m and 2.4 × 6 m |
Temporary buildings or permanent — and why not second-hand?
Temporary buildings cover a need for months or a few years: a site office, a decant classroom while a school block is rebuilt, or extra space for a busy season. Because the frame is bolted, the building can be unbolted, moved and used again on the next site.
Permanent modular buildings stay put. They sit on a proper foundation, connect to mains services and are finished to suit the rest of the estate, with ramps, canopies and cladding where needed. A permanent building usually needs planning permission and building regulations approval; a temporary one may too, depending on its use and how long it stays. Your council decides, and the drawing we send with your quote can support the application.
Used modular buildings can look cheaper, so check what you are buying:
- Transport and the crane lift cost the same for a used building as for a new one.
- Older units often have thinner insulation, worn floors and tired seals, which means higher heating bills and condensation.
- Buildings made before 2000 can contain asbestos — ask for a survey before you buy.
- You get the layout that exists, not the one you need, and usually no warranty. New buildings carry a 12-month warranty against manufacturing and assembly faults.
Transport, base and installation
Modules travel on a lorry with its own crane (HIAB), assembled or flat-packed. The driver lifts each module onto the base, so a single module is usually placed and ready quickly. A multi-module building takes longer because the joints, roof seals and services are finished on site; we confirm lead time and the site programme in your written quote.
The base must be firm and level: a concrete slab, strip footings or level concrete pads under the frame. Pad positions depend on the module size, so we confirm them for your layout. You need clear access for the lorry, room for the crane to set up and no overhead cables near the lift.
Once the modules are down, an electrician connects the supply, and modules with a WC are connected to water and drainage. For how the panels perform in a British winter, try our container winter temperature calculator.
Buy modular buildings direct from the factory
Our products are used in over 140 countries. Production is ISO 9001:2015 and CE certified. You deal with the supplier from the first drawing to the crane lift, and the price in your written quote is the price the building is built to.
Modular buildings are popular for:
- Site offices and accommodation on construction and remote sites.
- Classrooms and school blocks, including two-storey buildings.
- Staff housing and seasonal accommodation.
- Cabins and kiosks at stadium entrances, car parks and bus depots.
How they're built
Galvanised steel, sandwich panels, double glazing.
Every cabin starts with a bolted galvanised steel frame, 50 mm eps sandwich panel (pur option) walls and a 125 mm EPS roof, finished with PVC double-glazed windows.
How warm is it in winter? Try the calculator- 0.26
W/m²K roof U-value
- 0.46
W/m²K wall U-value
- 200
kg/m² floor loading
- 100%
bolted, not welded — re-usable
Straight answers
Questions buyers ask us
How much does a modular building cost?
A single 3 × 7 m module costs £4,290 + VAT open plan, £4,890 + VAT with a WC and £5,190 + VAT with two rooms and a WC; a 2.4 × 6 m module is £3,490 + VAT. Multi-module buildings are priced from a drawing, and delivery is quoted by postcode.
What is the difference between a modular building and a portable cabin?
A portable cabin is usually one self-contained unit that moves often. A modular building joins several modules into a larger building that may stay for years. Ours use the same bolted steel frame and insulated panels — see portable cabins.
Do modular buildings need planning permission?
A permanent modular building usually does, and so can a temporary one depending on its use and how long it stays. Check with your local council; the drawing we send with your quote can support the application.
How quickly can a modular building be installed?
A single module is usually placed and ready quickly once the base is done. Larger buildings take longer; we confirm lead time in your written quote.
Can a modular building be moved or extended later?
Yes. The frame is bolted, not welded, so modules can be unbolted, moved and re-used, and more modules can be added. Tell us if you expect to grow and we plan for it on the first drawing.
Are modular buildings warm enough to use all year?
Standard panels give a wall U-value of 0.46 W/m²K and a roof U-value of 0.26 W/m²K, with a PUR panel upgrade available.
Can I get a modular office with toilets and a kitchen sink?
Yes. The 3 × 7 m office with WC is £4,890 + VAT and the two-room module with a central WC is £5,190 + VAT. Ask for anything else and we confirm it in your written quote.
What warranty comes with a modular building?
12 months against manufacturing and assembly faults. Production is ISO 9001:2015 and CE certified.
Related ranges
Not sure which one? Ask us.
Tell us what it's for, where it's going and roughly when. We reply with a written quote by email.