Urban Planning is a discipline that covers the whole of spatial expressions of social processes. Like economics and culture, spatial development has an impact on all sectors of policy. The theme of this event focuses on diversity, growth and sustainable development, which are the key points for urban development in general. This paper concentrates on the creation of physical conditions, with particular emphasis on the accommodation of social differences in our built environment, the processes that lead to segregation, and how planning methods could provide a counterweight.