Karsten needs money from the bank. The bank does not pay if it is not in the designated rank. Otherwise, it has no security. The rank is still occupied by the old land charge of the previous owner. The old one out, new bank in, pay the house = transfer of ownership according to the contract, then build. Unfortunately, it takes time because the land registry office is involved twice. Maybe the new bank will accept the notarized statement that he has initiated the creation of the land charge.