The project addresses the conversion of a hillside building, originally divided into four residential units, through an intervention that radically redefines its spatial organisation, transforming it into a single-family residence. The distinctly elongated plan (32 × 5 metres) becomes both the starting point and the condition from which the design concept develops. The system of external circulation – roads, walkways, terraces and stairs – is translated into the interior, generating a new distribution scheme: the staircase, set against the retaining wall, frees the depth of the plan while preserving the continuity of openings towards the valley. A key element of the intervention is the exposed reinforced concrete wall beam, which supports the staircase and reconnects the floor slabs. Its vertical development – extending over eight metres from the semi-basement to the sleeping level, without touching the ceiling – gives it, alongside its structural role, a symbolic presence Within this narrow, vertical space, a specific spatial condition emerges: the stairwell, approximately one metre wide and over eight metres high, introduces an upward expansion, with almost monumental proportions that invite contemplation, counterbalanced by the swimming pool at the semi-basement level – long and narrow like the building’s plan and visible from the dining and living areas. The interiors are defined through a controlled reduction of materials - concrete, basalt stone laid in a grid pattern, glass and white lacquered wood - and by a system of bespoke furnishings that integrates function and spatial construction. “The project is characterised by a high quality of contemporary living, achieved through a dialogic relationship with its context, expressed in the respect for the existing building and in the proposal of an intervention that is at once minimal and rich in functions and meaning.” (from the jury statement, OAB Award 2010)