The intervention consists of recovering the townhouse, stripping it of any non-original elements and creating an open-plan space to enhance its square floor plan. A new volume is added on the north side, built using a lightweight timber structure that follows the main lines of composition of the original building while also distinguishing it. The energy performance of the two spaces conditions the distribution of the brief, situating the more permanent uses in the original house, with greater thermal inertia, and the multipurpose uses in the extension. Inserted between the two volumes is a nucleus that houses the vertical communications, installations and restrooms. The garden retains its original character, with a large permeable surface area that will act as a sustainable drainage system.