The 1960s is a transitional era in the history of architecture. The Byker housing redevelopment project well reflects this situation, and is a good example of materialization of social pluralism and expressional needs of a community. Therefore it was investigated in order to see its meanings in the history of mass housing in the Western countries. The conclusions are as follows: It is the first large-scale project where the concept of user participation was sucessfully realized; It suggested various tools of desirable design methodology; It made a paradigmatic change from modernism to post-modernism in the history of contemporary mass housing projects.