3 Patios House is a modern two-story house located in Lomas de Chapultepec, Mexico, designed in 2018 by Once Once Arquitectura . Description Casa 3 Patios was a project assignment for a Client to live the house with her teenage son. The program was to design a modern home that could be enjoyed in different ways in its interior and exterior spaces, to provide solutions for climatic comfort with passive and active energy systems, enhance state of the art sustainable solutions, and to be of commercially attractive if wanted to be sold. We decided to approach the program creating a big central patio fully covered of a red Mexican granite stone, Porfido, mostly used as a floor finish in colonial plazas and courtyards to give authenticity and character. This patio was carefully thought to be closed with a glass facade on its south-east side and a skylight roof to receive the first sun rays and heat itself and the rest of the house by thermal mass heat radiation in winte