The GAPxPLORE project aims to evaluate the EPG in the Swiss building stock. It studies how the EPG is distributed among the building typologies (performance level and age). Large-scale datasets from a range of sources containing calculated and real energy consumption data of buildings are analysed. GAPxPLORE also investigates the Energy Savings Deficit (ESD), defined as the difference between expected and achieved energy consumption reductions in renovated buildings. The focus lies on the final energy consumed for heating and domestic hot water in residential buildings.