How can a building adapt to the existing city, and how can a building adapt to the way we live our lives today?As a result of population growth and changing living conditions we have to reconsider the way we build and live today. We need to live closer on smaller space. In Oslo there are several leftover sites in the city structure. I have chosen three sites, NEXTTO, BETWEEN and ONTOP. They are all located in a historical context and surronded by apartment buildings from the 1890s. How can the buildings adapt to their surrondings? There are more single parents, part-time parents,elderly and people who choose to live alone. Can architecture adapt to these changes in peopleslife situations, and create a more social and inclusive everyday life?We need to coexist.