ABSTRACTTwo of the main problems of mankind are the lack of housing and the accumulation of solid waste and garbage thatultimately brings environmental problems. Within this solid waste are plastics such as the PET bottles (for examplesoda bottles). In order to try to solve both problems, since 2001 Eco-Tec Soluciones has pioneered in the constructionof houses and water storage structures with PET bottles filled with rammed earth. Groups GRIME and Estructuras yConstrucción of the Pontificia Universidad Javeriana, associated with Eco-Tec Soluciones, documented the constructiveprocess and performed tests to evaluate the mechanical resistance to compression forces of earth-filled PET bottles.Pilot tests were also carried put for the mechanical behavior of walls made with earth-filled PET bottles subjected toloads perpendicular to the plane of the wall. These results and analyses are presented in this paper.The paper presents the main results of the research project “Construction with PET plastic bottles” developed by theMaterials and Structures Research Group (GRIME) in conjunction with the Structures group of the Pontificia UniversidadJaveriana. The authors wish to thank the Department of Architecture and Civil Engineering Laboratory at the PontificiaUniversidad Javeriana for its support during the development of this research.