Is it permissible for an Islamic bank to purchase an apartment from a cooperative society by installments, and then sell it to me at a profit? Or does this fall under the category of usury (riba)?

"A bank's purchase of an apartment from a cooperative society and then selling it in installments (murabaha to the one who commands the purchase) is permissible in principle. However, in this case, the apartment is owned by you, so the bank's involvement to pay the remaining installments is a loan. If the bank recovers the installments with an increase, it is a prohibited usurious loan, and the transaction is not considered murabaha."