This article presents the methodology used and results achieved in a study on strategies of sustainable architectural rehabilitation in a group of stilt house dwellings (palafitos) in the city of Castro. In addition to the concept of "sustainable architectural rehabilitation", environmental, social and economic, as well as architectural factors are addressed. They are evaluated qualitatively and quantitatively with the understanding that they come together to reaffirm the value and identity of a culture. The case that was chosen, stilt houses in Castro from the Pedro Montt 2 neighborhood, presents the opportunity to analyze the evolution of fragile pieces of architecture with heritage value that are destined to change uses or be adapted to the transformations that the city and society have experienced in recent decades. Data was collected, and different stilt house units were inspected with regards to three variables (environmental, physical and socioeconomic). Then intervention proposals were outlined that preserve local values and attributes and open opportunities to improve social and economic conditions for their inhabitants.