BuildON project focuses on the transition towards decarbonization and digitalization of buildings.Building digitalization is an innovative and systematic approach that offers excellent potential for better energy management, benefiting building occupants, owners, and the energy system.Over 42 months and using a combination of technologies, involving monitoring, assessment, prediction and optimization, BuildON will promote a multidisciplinary approach to improve the energy performance of buildings by developing replicable and intelligent building services for the transition to a heterogeneous system of technological tools.Co-Funded by the European Union and the UK Research and Innovation (UKRI).This Project is funded by the European Union under the EU Programme Horizon-CL5-2022-D4-01-03 under Grant Agreement Number: 101104141. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or CINEA. Neither the European Union nor the granting authority can be held responsible for them.This work was funded by UK Research and Innovation (UKRI) under the UK government's Horizon Europe funding guarantee grant number 10069441.