The plot is exceptional: widely visible from the corner of Avenue of Flanders, it is very close to the Bassin de la Villette and it benefits of such a length of 36 meters of frontage facing south.Some options obviously emerged:_Using the Southern front line by designing of a "thermal" front with loggias, will able to regulate the temperature for summer to winter comfort. A buffer space consists of two sliding glass windows thathave several environmental advantages: the heat losses are reduced, the heat from sunlight is absorbed by the floor and walls during the day and then released at night, and fresh air provided by controlled mechanical ventilation is then preheated._Designing multi-oriented apartments with entrance and bathroom in the north and rooms with balconies shooting south. Some flats even have a double height in the living room._ Developing a stepped shape for the building to the West, with private terraces and green roofs to open up views to the West and create favourable external spaces for all.