This architectural proposal regards an old industrial building which is converted into a contemporary office space, fully integrated into the broader residential area where it is situated. The existing stone shell acts as a base of the new building, which is developed in height, so as the configuration of the façades follow a course from solid to transparent. At the same time, even if from the outside there is the sense of a single volume, the building is fragmented in its interior, since the plan is organized in the perimeter of two atriums and the circulation is developed through bridges and open stairwells. The atriums function as cores of green, whilst in combination with the roof openings, revert the introvert character of the building, creating a feeling of external space in the interior of the building.