Land registry costs for transfer of ownership

I believe it is only the transfer of the old properties to the heirs that is free of charge

I see the context the same way. The property must first be transferred to the heirs (free of charge for up to 2 years), because it can only be divided by the owners. In your case, this probably happened during an appointment with the notary; for the mere transfer after inheritance, a notary is not necessarily required. It is enough to present the certificate of inheritance at the land registry office.

The solution to the mystery is, according to the land registry office, that a new survey was conducted :( Therefore, these costs are incurred ... Well, as the saying goes? You have to have money.