The Kreuzberg Tower was part of the 1987 International BauAufstellung (IBA) Program. The German program continues to support innovative architecture and design through built and unbuilt projects. In 1987 the IBA invited noted architects and designers to envision new low and middle income housing for West Berlin. Hejduk's project is composed of a 14 story tower with two separate 5 story wings. The neutral coloured tower and wings feature green geometric shapes attached to the façades. These extrusions serve as balconies and sun shades for the low income housing units.