Only 0.7 percent of residential buildings in Germany will have had their facades, roofs or windows spruced up in 2023. A report commissioned by the Federal Ministry of Economics in 2022 stated that 1.7 to 1.9 percent of all residential buildings would have to be renovated for energy efficiency every year.
The German Economic Institute (IW) also put the necessary renovation rate at around two percent. A rate of two percent means that it would take mathematically 50 years until all of the houses in the republic were thoroughly renovated.