Casa Pedegral formerly known as Casa Prieto López, was designed at the beginning of the architect's third and most celebrated artistic phase. The house is now named for the neighborhood where it is located, an affluent suburb on the southwestern outskirts of D.F. In the 1940s, when Barragán purchased the real estate cheaply from the government, it was a desolate petrified lava field. In the years that ensued, it served as the canvas for an ambitious modernist urbanization project, in which Barragán and his contemporaries sought to develop the area while preserving the integrity of its unique ecosystem.
Barragán celebrates the petrified lava and weaves this into the design of Casa Pedegral. It is not only feature in the outside living areas and surrounds, but into the dining room and molten lava wine cellar.