“Living Box" is a project of compact living unit. It is a proposal of ultralight, expandable house. It consists of two equal modules which during transportation can be reduced to the dimensions of standard cargo container. After arriving to a desired spot, they can be quickly converted to a large and comfortable living space. the structure is an aluminium frame covered with a glass fibre and propylene. This solution guarantees mobility and possibility of placing one unit on another, creating in this way a habitation complex. The application of this solution is infinite: from holiday villas, on-roof lofts, temporary habitation for workers, till alternative houses for the natural disaster victims.