In Portugal, concepts such as sustainable construction, sustainable development, and urban sustainability indicators still have limited use and application. Thus, the aim of this paper is to create the bases for the establishment of a suport system for the evaluation and sustainability quality certification for the built environment, covering building and public open spaces. The certification system will be applied to the municipally of Coimbra, more specifically to its parishes. Then, through the results of testing, it is possible to check which aspects need improvement and what measures could be implemented to improve sustainability.