The historical Ensemble Kraftwerk Bille in Hamburg will be developed and used for mostly office spaces with the addition of an event hall, small public services and a hotel. The competition asked for two roof extensions for the offices as well as a newbuild structure for the hotel. Extensions in such a context give the possibility to create different types of spaces and offer qualities beyond being purely functional and flexible, which becomes more and more important if we think about our working life of the future. This can mean offering spaces with different spacial qualities depending on needs and the possibility to have a direct connection to outdoors. All new structures are lifted from the existing base on the same historical level, offering an open floor where one can step outside and connect to the other buildings around.