20ft Expandable Container House with Wood Grain Wall Panels, Kitchenette and Bathroom

A 20ft expandable container house finished in red wood-grain wall panels with a black frame, set up as a one-bedroom unit with a kitchenette and a separate bathroom pod. It ships folded to 2200 mm wide and opens to a 38.2 m² floor by sliding the two roof sections up and pushing the side walls out — no crane, no welding, no wet trades on site.

The folded width is what makes the economics work. A single 40HQ container takes two complete units, so a buyer ordering a pair pays one set of ocean freight for a building of just over 76 m². For a garden annexe, a rental cabin, a guest suite or a site office with accommodation, that ratio is usually the difference between a landed cost that closes and one that does not.

The unit in the photographs is the standard 20ft model: 5900 mm long, 6480 mm wide extended, 2480 mm high, with a Q235 hot-dip galvanised frame, 75 mm EPS external wall panels, 50 mm internal partition panels and a 2.0 mm PVC floor over 18 mm fireproof magnesite board.

Standard 20ft unit as built: wood-grain wall panels, black frame, steel security door and PVC sliding windows.

The expandable range is built on four module lengths. The 20ft is the mid size and the one most often chosen for a single household, because it gives a usable floor area without needing a second container to ship it.

Figures above are the manufacturer's standard range data. Internal layout, window and door positions, wall colour and optional fit-out change the shipping weight and are confirmed on the drawing for each order.

The unit leaves the factory folded: the two side wall panels lie flat against the frame and the roof sections sit down on the body. On site the sequence is four steps and needs two people and hand tools.

• Release the safety latches and lift the two roof sections in sequence, then lower the floor sections.
• Push the folded side walls outward to a vertical position and install the corner connectors.
• Seal and trim the four joints where the sliding panels meet the fixed frame.
• Connect services to the pre-wired distribution point and the pre-plumbed kitchenette and bathroom connections.

Two units side by side in the factory. The seam line between the sliding wall and the fixed frame is the only moving joint in the envelope.

Because the structure is bolted and the panels slide rather than demount, the unit can be closed again and relocated. It is a building that keeps its value when the site changes, which matters for rental operators and for projects on short leases.

The frame is Q235 hot-dip galvanised steel at 2.5 mm to 3.0 mm wall thickness, with 6 mm corner head liner plates at the lifting points. That is heavier than the folded-panel cabins sold at the low end of the market, and it is the reason the 20ft model carries 3.4 tons of shipping weight rather than two.

Materials

• Main steel frame: Q235 hot-dip galvanised steel, 2.5 mm - 3.0 mm thickness, 6 mm corner head liner plates.
• External wall: 75 mm EPS sandwich panel as standard, upgradable to rock wool for fire resistance.
• Internal partition: 50 mm EPS sandwich panel.
• Roof: 0.35 mm corrugated colour steel sheet outside, 50 mm EPS insulation, 200-type ceiling board inside.
• Flooring: 18 mm fireproof magnesite board, moisture-proof and insect-resistant, finished with 2.0 mm wear-resistant PVC floor leather, upgradable to 4.0 mm SPC.
• Windows: PVC sliding windows with fly screens, set in black surrounds.
• Doors: steel security door as the main entrance; interior doors to the bathroom pod.

Extended, the 20ft unit is 5900 mm by 6480 mm. That is wide enough for a living area on one side of the entrance and a bedroom on the other, with the kitchenette and bathroom grouped along the back wall where the plumbing and drainage can be brought in at one point.

Interior as delivered: white wall and ceiling panels, PVC floor, kitchen run and bathroom pod door with the distribution board above.

The interior in these photographs is deliberately left plain. Walls and ceiling are white laminated panels, the floor is a light oak-pattern PVC, and the only fixed joinery is the kitchen run and the bathroom pod. That is the right specification for a rental unit: neutral enough to suit any tenant, and cheap to repaint or re-floor between lets.

Both wet areas sit in one corner so that a single supply and waste connection serves the whole unit. The kitchenette is a straight run of base cabinets with a sink position and space for a two-ring hob or a freestanding unit; the bathroom is a separate pod with its own door, a glazed panel, a shower tray, a WC and a basin.

The same corner from the entrance side: kitchen counter on the left, bathroom doors on the right, consumer unit above.

The bathroom pod is built into the module rather than added later, which is the point. A pod fitted on site needs a wet trade, a drying period and a waterproofing inspection; a pod built in the factory arrives tested and only needs connecting. It also keeps the internal partition to a single panel thickness, so no floor area is lost to a service void.

The finish shown is the red wood-grain colour steel panel with a black frame, black window surrounds and a black steel entrance door. It is one of three standard combinations — white, red wooden and dark grey panels, with white, black or dark grey frames — so the same module can be ordered as a neutral white cabin or as the warmer version photographed here.

Front elevation: central entrance flanked by windows in the same wood-grain panel, black frame and corner posts.

Wood-grain panels cost only marginally more than a flat colour and do more work than most upgrades: at a distance the unit reads as a timber-clad cabin rather than a container, which is usually what a holiday-let or garden-annexe buyer is paying for. A 16 mm metal carved board is also available as an external decorative layer if a heavier texture is wanted.

The electrical installation is pre-wired in the factory to a consumer unit mounted inside the unit, with circuits run to the lighting points, socket outlets and the bathroom. On site the incoming supply connects at a single point. The kitchenette and bathroom are pre-plumbed to stubs at the wall, so the site connection is a matter of hours rather than days.

• ISO 9001 / ISO 14001 / ISO 45001 management certifications
• CE certification and SGS inspection
• Fireproof certificate for the panel specification
• Wind resistance test report
• Electrical components to CE / IEC / UL as specified on the order

Certification documents are issued per production batch. Confirm the electrical standard required in the destination country before the order is released, because the component set changes with the market.

• Garden annexe and granny annexe: a single-storey unit at the end of a garden, delivered folded and opened in a day.
• Holiday let and glamping: one bedroom, kitchenette and bathroom — the standard short-let specification.
• Site office and welfare: open plan with a canteen corner, or split into office and drying room.
• Farm and estate accommodation: staff housing that can be relocated between properties.
• Showroom and sales suite: a finished interior that can be moved to the next development.

Corner detail: the panel wrap and the black corner post, with the lifting points visible at the frame head.

Two people with hand tools can complete the unfolding sequence — roof sections up, walls out, corner connectors, joint sealing — in a few hours. The service connections take longer than the structure, and the electrical and plumbing work has to be done by a local qualified tradesman.

No crane is needed to open the unit. One is needed to lift it off the truck and onto its piers, as with any container. Two units fit in a 40HQ, so a pair can be delivered, lifted and opened in a single day.

Level pre-cast concrete piers or a compacted hardstanding at the corner points. No slab is poured, which keeps the unit removable and avoids excavation on a leased or protected site.

Yes. The internal partition can be moved, the kitchen run extended, and window and door positions changed on the drawing. The bathroom pod position is the one element to fix early, because its drainage falls to a single outlet.

The 75 mm panel is the standard specification and is intended for temperate and warm climates. For cold winters, order the rock wool upgrade and specify the roof and floor insulation accordingly; the frame accepts the thicker panel without a change to the module size.

Yes. Units can be placed end to end or side by side and connected at the frame, which is how a 30ft or 40ft equivalent floor area is often built while keeping to the 20ft shipping module.

Two 20ft units per 40HQ. The 10ft model loads four per 40HQ, the 30ft and 40ft models one each.

Yes. The frame is bolted and the side walls reverse the opening sequence, so the unit can be closed, lifted and relocated. Repeated moves are supported by the heavy-duty bolt-together design, subject to inspection of the seals at each move.