The project´s main difficulty was to design a residential building in a corner lot with an immovable house on the first floor and a market on the ground floor, saving distances, such as the challenge that Pierre Chareau had in the “Maison de Verre”. Thus, the building had no other chance but to grow crossing this “rock”, just as a Bonsai does it naturally. In this way, the structure was thought as a tree, with roots, trunk, branches and fruits. The roots would be three perforated concrete tubes that would go from the foundations, trough the three central yards of the house (without interfering with its ordinary life) till a cantilevered concrete slab placed one floor upon the terrace of the house. On the ground, the bearing walls of the market, supporters of the house, would be replaced by another cantilevered concrete slab, placed on the first floor, which would enable the market to be completely covered by glass. From the upper slab towards the sky, a centric concrete tube, the tree trunk, receives the loads of the fruits, the apartments, also helped by a perimeter ring of concrete columns, the branches. Both of them, the trunk and the branches, would load their stresses to the cantilevered slab, and both slabs would do the same to the roots.

In regards to the apartments, the existence of two typologies, one bedroom and two bedrooms in two floors, gives diversity to the building trough the type of people that could live in. Finally, the facades of the building would be completely solved by different rows of bricks, acting like blind walls, parasols and, even, railings.