Expandable container houses are among the most popular solutions in today’s prefab building industry. They offer fast installation, cost-efficiency, and complete customization. But one crucial decision remains: Which size should you choose?
This guide explains everything you need to know about 20ft, 30ft, 40ft, and small modular units. We break down the specs, use cases, logistics, and how to choose the right model for your project.
| Size | Expanded Area (㎡) | Typical Applications | Container Loading Capacity |
| 20ft | ~36㎡ | Singles, Airbnb, portable office | 2 units / 40HQ container |
| 30ft | ~56㎡ | Couples, small families, holiday rentals | 1 unit / 40HQ container |
| 40ft | ~74㎡ | Family homes, offices, commercial use | 1 unit / 40HQ container |
| Small Unit | 18.5–27.5㎡ | Guardhouses, kiosks, booths |
The 20ft expandable unit unfolds to approx. 36㎡. It fits perfectly for one person or for short-term rental models.
Why choose 20ft:
Offering 56㎡ of interior space, the 30ft expandable container is ideal for couples or small families who need a full set of rooms in a compact footprint.
Key advantages:
With approx. 74㎡ of living space, the 40ft model can support multiple bedrooms, an open kitchen, and optional terraces or solar systems.
Ideal for:
Small units aren’t designed for primary housing but serve important supporting roles. Each unit ranges from 18.5–27.5㎡.
Perfect for:
Before choosing, consider:
| Scenario | Recommended Size |
|---|---|
| Single-user / Airbnb | 20ft |
| Couple or Small Family | 30ft |
| Family Home / Office Use | 40ft |
| Kiosk / Guard Post / Add-on Use | Small Unit |
Need help choosing? Our engineering team provides:
Free layout consultations
Customized drawings
CE, AS/NZS, and international compliance
