The planning based on environmental and social considerations has been well received due to its importance for urban sustainability. On the other hand, housing is still an unmet need in many cities around the world, which reinforces a scenario of compact cities, consolidated, and in need of expansion through high-density housing. This research identifies definitions and some experiences developed in Spain in the aforementioned areas, under the framework of ecological urbanism, in order to develop qualitative considerations towards a housing and city model that provides feedback for this discourse and give new insight for the design of better cities and housing in line with current needs. The Spanish case was chosen due to the fair amount of research on the subject, practical cases, evaluation tools, how easy is to corroborate information, and access more documentation.