An addition of 3 floors over a conservated building, originally planned by Architect Carl Rubin in the international style.The original square composition maintains the horizontal continuous lines by subtracting volumes in favor of balconies along the whole facade. In addition, the original mass is characterized by being shifted on the plan aspect (which creates an open space in the entrance of the building) as well as on the section aspect (by planning the apartments on the half floors). In order to keep the original proportions, the addition was designed by positioning a disconnected floating element over the existing mass, That features a material that contrasts the white city plaster – cortan rust steel. Positioning the addition over the entrance hall which the original plan allowed, completes both parts as one.