The objective of this Final Degree Project is to make a rehabilitation and a change of use of a residential building of the year 1960, which has been closed for a few years, located in Barcelona in the neighbourhood of Sarrià. The plot where this building is located is between two other buildings and has access from the Gresolet street, where we find the main building that consists of 3 floors and the other access is on the Duquessa D'orleans street, where there is a small building with a single floor and basement. The purpose of the project is to conserve the existing structure, modifying it as little as possible, extend it and carry out an internal reform obtaining a new distribution and gaining meters in each of the plants. Giving different uses to the two buildings that are in the plot dividing the garden in two to make them independent.