Is it permissible to purchase a house or an apartment in a housing cooperative that relies on a system of buying shares in a housing company, knowing that this company may obtain usurious loans from banks to cover the costs of major renovations, and the buyer pays a portion of these loans?

It is not permissible for a housing company to borrow with usury, nor to contribute to it as long as it engages in such practices. Borrowing with usury is a grave sin and carries severe warnings. If the buyer is the one borrowing from the bank to pay for the apartment, this is even more prohibited. It is forbidden to purchase apartments with usury, and high housing prices do not make usury permissible. One can rent a dwelling or seek permissible alternatives, such as someone who buys an apartment and then sells it in installments.