Post-war middle-class housing played a key role in constructing and transforming the cities of Europe and America, deeply impacting today’s urban landscape. And yet, this stock has been underrepresented in a literature mostly focused on public housing and the work of a few master architects. This book is the first attempt to explore such housing from an international perspective. It provides a comparative insight into the processes of construction, occupation and transformation of residential architecture built for the middle-classes in 12 different countries between the 1950s and 1970s. It investigates the role of models, actors and policies that shaped the middle-class city, tracing geographies, chronologies and forms of development that often cross national frontiers. This study is particularly relevant today within the context of «fragilization» which affects the middle-classes, challenging, as it does, the urban role played by this residential heritage in the light of technological obsolescence, trends in patterns of homeownership, as well as social and generational changes.