The ruling on borrowing a sum from a bank to buy a house, with the bank stipulating an increase upon repayment

Question:
May Allah reward you. The questioner says: I wanted to buy a house through a bank, so they told me that they would write a contract between them and the house owner for a period of fifteen days. If I complete my paperwork with them, the bank will pay the amount to the house owner; if I do not complete the paperwork, the bank will not pay anything. Is this sale valid?

Answer:
This requires consideration. First, the bank does not buy the house to own it; rather, it buys it for you, as if it is your agent, and it pays the price as a loan that it will recover from you with an increase. This is not permissible. This is a matter that is not permissible. However, if the bank has houses, if it has ready-made houses available and sells you one of them, there is nothing wrong with that. But if it buys it for you from people and pays the price and takes an increase from you, this is an expression of it being your agent and that it paid the price on your behalf in the form of a loan and recovers it with an increase. Yes.