According to HABITAT III, roughly a quarter of the world's urban population—equivalent to the combined populations of Spain, Italy, France, Germany, the United Kingdom, Brazil, and the United States—lives in slums. In São Paulo, IBGE found that 1.2+ million people live in slums. These areas are becoming increasingly dense, which poses a challenge for sewage and drainage systems. Paraisópolis is the densest slum in São Paulo, and its streams have been occupied by housing. Sondotécnica presents Autodesk technology—Civil 3D, ReCap, Revit, InfraWorks, InfoWorks ICM, and InfoDrainage software—as a solution. Through building information modeling (BIM), we interpret the existing situation and can perform the simulation and validation of the sanitary sewage and drainage project, restoring the stream clean and integrated into urban life. The goal is to transform the slums into sustainable environments.