To buy (or to sell) one must do lots of checks to the point of having the impression of playing the IndianaJones town planning permits. Must also make diagnoses. They are mandatory. For the most exhaustive information possible for the buyer.
A poor energy diagnosis can prevent the property from being rented from 2025
Information diagnostics that may have consequences. Notably energy diagnostics. A bad grade will not allow you to rent your property if the class is not upgraded. Of course, this can also play on negotiation of the selling price, and even on the loan requested from the bank to acquire the property.