21.01.2026
The energy efficiency preference index among single-family homeowners is 46 (on a scale of 0 to 100), indicating untapped potential for improvement. The analysis reveals a divided market: approximately a fifth of households are completely passive, living in energy-inefficient homes and not considering renovation. Most of the remaining households are already on the path to greater efficiency, either by actively considering renovation or by having already updated individual elements such as windows, the facade, or the roof.