The original layout of the building to be renovated provided for two apartments per floor. Although these were approximately symmetrical, they had, in fact, considerable differences in lighting given the corner situation of the building and the existence of a dividing wall. The apartment with facade to the corner streets could open windows both on one of its smaller sides and one of the longest ones. The apartment adjoining the party wall, however, could only light up on its smaller side. This required the creation of a lighting and ventilation patio for the second apartment that was detrimental to its spatial quality.

The new duplex to be made preserves the duplicity in plan that the current organization suggests, so that it allocates the band that gives to the street to a more "public" zone and the band related to the dividing wall to a more "private" zone. The first consists of the dining room, the living room and the mezzanine, which are arranged in a double height space containing the inner staircase leading to the upper level of the duplex. The second contains the kitchen, the office, the laundry room and the toilet (on the ground floor) and the master bedroom with a dressing room and the bathroom (on the first floor), organized around a generous, fully glazed patio that favours the relationship between the inner and outer spaces.

Circulations are organised in such a way that rooms such as the toilet can be used from both "public" areas (dining room or living room) and "private" areas (kitchen or study-office) without interfering in other spaces in order to ensure the privacy of residents.