This work exposes a methodology to assess and to identify areas of greater urban vulnerability due to imbal-ances generated by spontaneous urban growth. The residential sector, basic infrastructure services, occupation in the territory, its evolution in terms of growth, energy needs and their respective emission of pollutants are evaluated. In relation to the basic infrastructure services, electricity and natural gas networks are analyzed. The offer is analyzed from its qualities, with the coverage of each network and the users’ opinions (demand). With the obtained results, maps were built to identify homo-geneous areas in order to define the growing unsustainability.Instituto de Investigaciones y Políticas del Ambiente Construido (IIPAC)