A pair of two-story houses that are exceptionally efficient in terms of energy, due to the use of natural light as well as rainfall. They are located on a couple of adjacent lots that are also very steep, which is ideal for achieving the best views of the Valle de Bravo lake from the top floors. The materials used in construction and in finishes, along with a functional design, make sure the project is in perfect harmony with nature. Green roofing, local stone, and the façade lattice made out of specially-treated wooden slats all contribute to the houses full integration into the landscape.