Note: This is general planning information only. Always check the property, local council requirements, building approval pathway, engineering, services and supplier inclusions before paying a deposit or ordering a container home.

When people compare container homes, the first question is often whether to start with a 20ft or 40ft container. The answer depends on use, site access, layout expectations and the full project budget.

A 20ft container can be practical for compact offices, studios and simple accommodation ideas. A 40ft container gives more room for a bedroom, bathroom, kitchenette and storage, but it usually needs more space for delivery, placement and site work.

When a 20ft container may suit

• You want a backyard office, studio, sleepout, small guest room or simple cabin-style space.
• The site has tight access or limited room for placement.
• You want to keep the project compact and easier to transport.
• You are comparing a lower-cost starting point.

When a 40ft container may suit

• You want a more usable living-style layout.
• You need separate sleeping, bathroom, kitchenette or storage areas.
• The site has enough access for delivery and placement.
• You want the space to feel less temporary and more like a small home.

Costs that apply to both sizes

Whichever size you choose, allow for transport, unloading, foundations, tie-down, engineering, services, approval checks, fit-out, decks, stairs, drainage and contingency.

A simple comparison approach

1. Write down the intended use.
2. Sketch the space you need.
3. Check access and placement on the property.
4. Compare what each supplier includes and excludes.
5. Ask what changes if approval, engineering or services become more complex.