Field help:
Acquisition / production of the building
Indicate whether you purchased or built the property yourself.
- Select “The property was purchased” if you bought the house or flat.
- Select “The property was built/constructed” if you built or had the house built yourself.
Important: For the tax reduction, the property must be older than ten years at the start of the energy efficiency measures. In the case of a purchase, the start of the initial construction of the building is decisive – not your purchase date.
Example: You buy 2024 a house built in 1998 and start 2025 roof insulation. Select “The property was purchased”. The start of construction in 1998 is decisive for the ten-year period.
