The main external architectural intervention is to the back of the building, in the form of a new extension at lower ground floor, the roof of which, partially covered in structural glass, becomes a terrace which is reached from the raised ground floor. The rear extension has its own patio at lower level with a tall granite wall, part of which forms a waterfall from the garden above.
Internally, the spaces were redesigned extensively. The new lower ground floor was excavated further to allow even higher ceilings. It encompasses the kitchen, eating area and family living room. The raised ground, at entry level, contains the formal living and dining room, completely open t o each other and with a new, specially-cantilevered staircase connecting the two floors. The staircase is made up of a folded steel sheet connected to a steel beam within the wall. The steel plates are then clad in walnut, with a glass balustrade connected to the side.
Another important element in the room is a leather-covered side unit, which curves around at the top and continues across the ceiling. The unit contains a dumb waiter from the kitchen below, a bar, TV set, storage and incorporates lighting at the top.