San Francisco-based 3D-printing startup Apis Cor has successfully finished a residential house printing project - built in just a day, on-site, at a cost of around $10,000. The main components of the 400-square-foot-home, including the walls and partitions, were printed solely with a concrete mixture. After printing out the walls, the company's large crane-like 3D printer was removed, and contractors installed insulation, windows, and a roof. The house consists of a hallway, bathroom, living room, and kitchen and is located in one of Apis Cor’s facilities in Russia. These houses could be used to help quickly re-house people affected by natural disasters.