Expandable houses give buyers more interior space without requiring the full shipping footprint of a permanently wide building. The side wings are folded for transport, then opened on site to create a larger usable layout. The right choice is not only about floor area: delivery access, placement space, room count, utilities, and intended use all affect the decision.
PHINIDE offers expandable-house planning around 20ft and 40ft model sizes. This guide explains the practical differences before you request a delivery and installation quote.
20ft expandable house dimensions
The 20ft expandable house has an expanded external size of 6300 x 5900 x 2500 mm, approximately 20.67ft x 19.36ft x 8.20ft. Its packed size is 2200 x 5900 x 2500 mm, approximately 7.22ft x 19.36ft x 8.20ft. The catalog reference weight is approximately 5,512 lbs.
This size can be a strong starting point for a compact living area, guest accommodation, a project office, a one-bedroom layout, or a tailored two- or three-bedroom plan where the space is used efficiently. Final room planning depends on the bathroom, kitchen, storage, and circulation requirements.
40ft expandable house dimensions
The 40ft expandable house has an expanded external size of 6300 x 11800 x 2500 mm, approximately 20.67ft x 38.71ft x 8.20ft. Its packed size is 2200 x 11800 x 2500 mm, approximately 7.22ft x 38.71ft x 8.20ft. The catalog reference weight is approximately 11,023 lbs.
The longer model creates more room for separated sleeping areas, a larger living zone, a kitchen, storage, or project accommodation. It is usually the better starting point when privacy between rooms, a larger common area, or a more complete residential layout matters.
How to choose between 20ft and 40ft
Start with the intended use
For a compact guest unit, field office, small family layout, or limited site, the 20ft model may be more practical. For multi-room living, team accommodation, a larger family plan, or a more substantial common area, the 40ft model provides more planning flexibility.
Review the packed delivery size, not only the expanded size
The packed width is much narrower than the expanded building, but the delivery vehicle still needs a clear route, turning space, overhead clearance, and a safe unloading position. A quote should account for gates, driveways, utility lines, road restrictions, and lifting equipment before the model is confirmed.
Allow room for deployment and installation
Site planning must include the full expanded footprint, working clearance for the crew, access to the entrance, and a level placement area. Water, drainage, electrical connections, HVAC planning, and local permit requirements should also be reviewed early for residential or long-term use.
Typical materials and structure
The expandable-house catalog configuration references a galvanized square-tube frame, insulated sandwich panels, an 18 mm cement-fiber floor, and double-glazed door and window options. Product details can vary by selected layout, climate needs, and local requirements, so the final bill of materials should be confirmed with the quotation.
Questions to answer before requesting a quote
- What city and site address will receive the unit?
- What will the space be used for: living, guest use, office, project accommodation, or storage?
- How many bedrooms, bathrooms, and common areas are needed?
- Is there clear vehicle and lifting access to the final placement area?
- What utilities, foundation, permits, or inspections may apply?
- What is the required delivery timeline?
Plan your expandable-house project
Share your city, intended layout, site access information, and preferred delivery date. PHINIDE can help match a 20ft or 40ft expandable model to the project and identify the details needed for shipping and installation planning.