Portable Stacked Cabin Multi-storey portable buildings are the perfect solution for businesses hoping to expand, but have limited on-site space to do so. Made up of our self-contained portable cabins, the buildings we manufacture can be two or three storeys high, offering plenty of space for additional offices or teaching facilities. These building types are therefore a popular option for businesses and schools, allowing them to achieve two or three times more working space without having to comprise on the amount of ground area available.