What is the ruling on buying a brother's house with a loan from an Islamic bank, knowing that the loan amount is less than the value of the house, and the purpose is to invest the loan amount in building another house, bearing in mind that the questioner lives with his brother?

If the bank grants a loan for purchasing a house, it is not permissible for the borrower to agree with his brother on a fictitious sale of the brother's house so that they can both benefit from the loan. It is advisable to present the matter to the scholars of the land due to their expertise in the conditions of real estate loans.