In the 1950s and 1970s, the Hamburg housing market was under great pressure. It was primarily cooperative housing companies that provided answers to the model of the respective decade, from the structuring concept of the structured and loosened up city of the 1950s to the model of “urbanity through density” of the late 1960s to the early 1970s. The estates of these decades are characterised by a low building density, unsatisfactory open spaces, and a need for modernisation of the existing building stock; from today’s perspective, they call for restructuring and upgrading. The aim of the procedure is to develop approaches and ideas for 14 Hamburg housing estates in close cooperation with the Hamburg housing cooperatives. Experimental and innovative approaches to solutions should be generated that enable discussion and provide transferable starting points in order to generate added value for the city as a whole and to show development options for the quarters dating from these decades.