To clarify, I am buying the house solely because of equity, my girlfriend / wife is also moving in and contributes to the repayment. Now the bank is not satisfied since she is not listed in the land register, that she is paying along. The bank wants a separate apartment or living level in the house and then it is OK. I can build it that way now and change it later, which, however, leads to additional costs. That's why I am asking myself whether I should have the two doors changed right after the loan is approved in the way I want anyway. That is the question, not whether I should reconsider building or not! Furthermore, my construction company says that changes during the construction phase are common. As mentioned, it is just two doors that have to be relocated ... please only answer if you know... or tips in that direction.