Container House Floor Plan & Layout
The hardest constraint in a container home is the fixed internal width of about 2.35 m (7.7 ft). Good plans don’t fight it — they work with it. This guide covers layout principles, lofts, fold-outs, and sample plans.
The Fixed Constraint: Width
Because you can’t easily widen a single container, design around a long, narrow volume:
- Run circulation along one long wall; don’t put a central corridor (it wastes width).
- Place storage and built-ins against the walls to keep the floor clear.
- Use pocket doors or curtains instead of swinging doors where space is tight.
Layout Principles
- Wet wall: group bathroom + kitchen on one side so plumbing runs in a single chase.
- Open the ends: glaze one or both end doors for light and a sense of space.
- Multi-function furniture: sofa beds, fold-down tables, wall beds.
- Vertical space: high-cube units let you add a loft for sleeping.
Lofts & Mezzanines (High-Cube)
A high-cube (2.90 m) unit gives ~0.3 m more height — enough for a sleeping loft over the bathroom/kitchen, roughly doubling usable area without widening the box.
Expandable / Fold-Out for Width
Expandable containers unfold on site to ~5–7 m wide, solving the width limit entirely. They need a flat pad and deployment space but deliver 2.5–3× the floor of a fixed unit.
Sample 20ft Plan (~13.9 m²)
- End A: glazed entry + sofa bed
- Middle: kitchenette along wet wall, bathroom opposite
- End B: wardrobe + desk
- Optional: loft over bath/kitchen for sleeping
Sample 40ft Plan (~28.3 m²)
- Zone 1 (end A): bedroom with loft above
- Zone 2 (middle): open living + kitchen on wet wall
- Zone 3 (end B): bathroom + storage
- Add a central spine of built-ins to avoid corridor waste
Multi-Container Layouts
- Side-by-side: remove a long wall to make one wide room (needs a steel header).
- L-shape: two units at 90° around a courtyard.
- Stacked: bedroom above living; engineer the connection.
The Numbers Every Layout Starts From
Design decisions get much easier once the fixed dimensions are on the page:
| Unit | Internal length | Internal width | Internal height |
|---|---|---|---|
| 20ft standard | ~5.90 m | ~2.35 m | ~2.39 m |
| 40ft standard | ~12.03 m | ~2.35 m | ~2.39 m |
| 20ft high cube | ~5.90 m | ~2.35 m | ~2.69 m |
| 40ft high cube | ~12.03 m | ~2.35 m | ~2.69 m |
The widths above assume insulation is installed inside the ribs. Losing 100–150 mm per side to insulation and lining is normal, so design to the finished width, not the steel width.
Furniture Clearances That Make a Plan Work
| Element | Minimum | Comfortable |
|---|---|---|
| Double bed plus access | 1.4 × 1.9 m with 0.6 m one side | 0.6 m both sides |
| Kitchen work aisle | 1.0 m | 1.2 m |
| Counter depth | 0.6 m | 0.65 m |
| Shower tray | 0.9 × 0.9 m | 1.0 × 1.2 m |
| WC front clearance | 0.6 m | 0.75 m |
| Dining seat per person | 0.55 m | 0.65 m |
A 2.35 m finished width fits a 0.6 m counter on one side, a 1.0–1.2 m aisle, and a 0.6 m tall unit on the other — provided you resist adding a second counter run on the opposite wall.
Three Layouts That Work in Practice
- Studio 20ft (couple): entry and glazing at one end, kitchenette and bathroom grouped on the wet wall, bed at the far end with a fold-down desk. Best when the unit is a cabin, office, or rental.
- One-bed 40ft: bedroom at one end with the bathroom beside it, open living and kitchen in the middle, storage along the spine. The most liveable single-container plan.
- Two-bed 40ft high cube: sleeping lofts over the bathroom and kitchen, living at the glazed end. Works where loft sitting height can be kept above roughly 1.1 m.
Layout Mistakes That Cost Space
- Placing the bathroom mid-wall, cutting the plan into two narrow zones.
- Using swinging doors in the narrow band instead of pocket or sliding doors.
- Spreading plumbing to both ends, doubling the service run and the cost.
- Ignoring insulation thickness, then finding the aisle 150 mm too narrow.
- Designing storage as furniture rather than as built-in volume.
FAQ
What is the internal width of a container house?
About 2.35 m (7.7 ft) after insulation — the key constraint for layouts.
How do I make a container home feel bigger?
Use end glazing, light colors, built-in storage, a loft (high-cube), or choose an expandable unit that unfolds wider.
Can I combine two containers into one room?
Yes — remove a shared wall (with a steel header beam) to join two units side-by-side into a wide open space.
Is a loft worth it in a 20ft?
In a high-cube 20ft, a loft over the wet area adds real sleeping space without lengthening the unit.
