This version is not peer-reviewed. Alejandro Jiménez Rios * ,Juliana Calabria-Holley ,Francisco Javier Castilla Pascual ,Anushka Gupta Alejandro Jiménez Rios * ,Juliana Calabria-Holley ,Francisco Javier Castilla Pascual ,Anushka Gupta You are already at the latest version Approximately 80% of the buildings that will exist in 2050 have already been built, yet most perform poorly in terms of energy efficiency and fail to deliver net-positive outcomes.