This programme of a mere 20 housing units adapts to the complexity of the lot and the diversity of the surrounding buildings. The main building opens up to the interior of the patio and leans upon a long, thick dividing wall which increases thermal inertia. The rest of the facade is a double glass skin with blinds in between, which keep heat out in the summer while in winter, the sun’s rays heat the inner side of the facade, which radiates this heat at night. This aspect, along with the use of solar panels and plantcovered roofs, will allow the reduction of energy consumption of up to 50 kWh/m2 per year.