The “House M” is located in Lujan, Buenos Aires province, Argentina. Is a single-family house project which was designed from its orientation and environmental characteristics. The house relates with the enviroment by its transparency and also introducing three patios, that divide the different program of the house, mostly solved on the ground floor. The ground floor is conected to the master bedroom by a concrete stair. On the south face of the house, the main access and all the services were located in order to generate a total permeability to the north side and the environment. The use of materials such as concrete, glass and wood where used to achieve architectural synthesis.