Field help: (2023) Start of production

Enter here the date on which the construction of the building began. The building must be more than ten years old at the start of the energy efficiency measure.

The decisive factor for determining the 10-year period is the start of the building's construction. In the case of buildings for which a building permit is required, the date on which the first building application was submitted shall be considered the start of construction.

If the date of the application for construction is not known for a building constructed before 2010, it is sufficient to enter the 01.01. of the year of construction; e.g. for the year of construction 1960, "01.01.1960" must then be entered.

In the case of objects for which building permission is not required and for which building documents must be submitted, the date on which the building documents were submitted is considered to be the start of the building's construction.