With the development of digitalization and its impact on domestic spaces, there is an increase in available data that describes the building performance and occurring processes in them. Integrated Smart Home systems usually control automatic temperature adjustment, light brightness levels, the position of the window openings or weather compensation. It provides insight into historical energy use and collects and stores information from installed sensors. As a result, there is an increase in data on actual outdoor and indoor boundary conditions which later can be used in creating the baseline models of buildings. It leads to a reduction of the Energy Performance Gap when compared with standard input models. Correspondingly, it allows for identifying best practices, establishing reference points for measuring and rewarding good performance, as well as increasing the general awareness of energy efficiency among building occupants which can result in behaviour changes.