Cities are engines of social change and diversity, whose density is increasing in many places. What housing models and architectural concepts do we need to secrure the quality of life in urban centres in the long term ? This book documents 26 current urban huosing projects, including neighbourhood and multistorey apartment buildings, cooperative complexes and social housing, or townhouses. The individual projects are presented from the organisation of the floor plan to the constructional detail. How open or seperated are they towards the urban environment ? Xhich materails and types of construction are suitable for which functions ? A complementaty section of the book shows how extensions, conversions, and refurbishments also contribute to meeting economic and ecological housing requirements in the city