The concept underlying the Loft Cube is to exploit large, flat, city-centre roof areas that have hitherto remained unused. The rooftops would form the base for lightweight, mobile dwelling units. After a two-year preliminary phase, the planners presented the prototypes for their modular housing cells in 2001 on the roof of the Universal Music building in Berlin. The Loft Cube can be erected in two to three days, including the internal finishings. It can also be dismantled in the same short time and moved to another location. Using a helicopter, the cube can be transported in its entirety.