The apartment to be reformed occupies the top floor of a building of the mid-nineteenth century, of classicist composition, with pilasters, Ionic capitals and sculptural decorations on the lintels and corbels, in the heart of the Gothic quarter of Barcelona. It has an area of 61.34 m² and a configuration very characteristic of the residential type tested in the city at that time.

It is accessed through a staircase located in the centre of the property that divides the residence into two halves, with the day pieces at the back and the night pieces at the front, connected by a long corridor next to the median wall.

The structure is made of load-bearing walls and wooden beams, with floors displaying various materials that reveal the transformations introduced over time. It does not present particular pathologies, but it does have a scant conservation status that recommends reinforcing the slab with a distribution layer to allow for the new distribution of the spaces.

The basic sanitary elements will be maintained and the new kitchen will be placed next to them, in the area with less light. It is conceived as a linear element partially incorporated into the dining room-work room, which occupies the main part of the piece that faces to the inner courtyard, through which it benefits from the sun and the views.

The space currently occupied by the corridor, the distributor in front of the toilet and the hall is replaced by a linear element of a doubly trapezoidal plan. This new corridor resolves the access to the apartment, gives entrance to the new bathroom and the main rooms at both ends and houses a cabinet for general use and a bookshelf. This enriches the only interior space of the apartment and gives it a greater complexity than that of a simple circulation element. At the end of this corridor is the living room, facing the corner of the streets between which the building is located. Next to it is the bedroom.