This project was born from the radicalisation of everything that seemed valuable to us in the domestic typological tradition of Barcelona's Eixample district. Thus, the type plants are formalised following the distribution of equal (or almost equal) rooms that traditionally characterised the housing of the area at the end of the 19th century. Homes that have seen their use modified over the decades without substantial changes. An apparently rigid system that, nevertheless, has allowed its use to change over time. Understanding this typological condition, the housing building has been conceived as a system of rooms in which each apartment can be expanded or reduced - by adding or subtracting pieces - to respond to the future needs of its inhabitants. With this flexibility in mind, the rooms have similar dimensions allowing to eliminate any kind of spatial hierarchy and program predetermination. Each floor can be defined and reprogrammed as needed, even the position of the kitchen can vary. This flexibility is possible thanks to the location of the bathrooms, where the vertical installations that can connect to all the rooms are concentrated. Initially, each floor is divided into 4 apartments of 5 rooms connected to each other without the need for a corridor. The kitchen is placed in the centre, the other rooms can be used, indiscriminately, as bedrooms, studies or living rooms. The ground floor, for its part, reinterprets the traditional and popular halls of the Eixample, where marble and large spaces define the place of reception and representation. As large habitable objects, traditional furniture is transformed here into petri volumes placed in the middle of a large open space. The uncovered interior courtyards allow for natural ventilation and literally turn the ground floor into an extension of the garden and the street, where it rains. Something similar happens with the façade, where the traditional archetypal composition has been directly replicated. The façade is proposed following a direct reinterpretation of the "ordinary" and traditional architecture of the Cerdà’s Eixample, in which lime stucco with decorative motifs, vertical openings, balconies and shutters predominate.