The basic objective of this paper lies on examining the interrelations that may eventually occur between the design of new urban environments - mostly those that follow today's postmodern urbanism guidelines - and the corresponding perception people develop about them. In other words, it aims at investigating the possible links between design and perception, and, hence, the influence that environmental design may exert on environmental perception. Or, alternatively, the possibility that design may be influenced by environmental perception. In psychological terms, this implies on studying changes that may arise in the urban quality known as urbanity, that is to say, in the dynamic texture of existential experiences that are conferred to people as they use the urban environment; and, as such, an issue deserving utmost attention both in urbanism and environmental psychology matters.