After the 27F 2010 earthquake in central-south Chile a rethinking of the residential architecture was necessary. This was seen as an opportunity to review and improve energy efficiency of housing, both on its morphological-constructive aspects and on the methodological procedures for new development. Simulations of thermal performances indicate that the climatic conditions in the zone lead to winter heating demand that can be better fulfilled with a correct study of the morphology of the dwelling: shape factor, envelope, direct solar gain and orientation among others. From an urban distribution point of view, the prioritization of collective housing over single-family dwellings is a major factor in the final results. The integration of thermal mass and the improvements of the thermal envelope can contribute to a better construction standard that will help to reduce the energy consumption. During the research some housing prototypes have been designed, revealing a better integration to the local climatic and geographical conditions.