Data on residential renovations are crucial for assessing their energy efficiency and living conditions of residents. Based on the real estate register data in Slovenia, we have information about the year of construction of buildings, as well as the year of renovation of roofs, facades, windows, and installations. However, the data for the period after 2007, when the last real estate census was conducted, is incomplete. Moreover, official surveys also have very limited data on this topic. To get more detailed insights into the renovation procedures of Slovenian households, we conducted our own survey on a web panel, which provided insights into renovation characteristics not captured by existing data sources. This contribution compares survey data on renovations with registry data and attempts to evaluate the quality of survey data.

The author acknowledge receiving funding from the Slovenian Research Agency for the project Using questionnaires to measure attitudes and behaviours of building users [Z5-1879] and from the European Cooperation in Science and Technology for the InnoRenew project [grant agreement #739574] under the H2020 Spreading Excellence and Widening Participation Horizon2020 Widespread-Teaming program.