Since 2009, social sustainability has been one of the four pillars of subsidized housing in Vienna. How this social sustainability is defined must always be renegotiated and optimized. This is because the requirements change in line with the social and demographic changes in society. Today, it is possible to respond to the needs of single parents, the elderly and young people in a more targeted way than in the past. This was one of the main goals in the development of the Wolfganggasse neighborhood.