The project at hand deals with the revitalisation and further development of a post-war modernist housing complex in the 10th district of Vienna. Within the design process the existing is regarded as a resource rather than a limitation. The building fabric is updated while the needs of 21st century occupants are likewise taken into consideration. The research has, for example, covered the modification of Tour Bois-le-Prètre by the Lacaton Vassal architects and the rehabilitation of the Park Hill settlement in Sheffield. The concept: the modification of the existing buildings, the redensification through two new buildings and the restructuring of the open space. All buildings have layouts of varying types and adaptable structures (skeleton and cross-wall construction). The floor plans can flexibly be adapted to changing inhabitant needs through modular shelves. So-called neutral layouts and 3 meter ceiling height in one of the new buildings provide for changeable unit sizes and commercial as well as residential use.