Is it permissible to take an interest-bearing loan from non-Islamic banks for the purpose of building a home, given the unavailability of Islamic alternatives, the urgent need for housing, and the fact that dealing with these banks is a necessity for receiving salaries and safeguarding money?

The problems mentioned in the question are caused by straying from Sharia and replacing it with man-made laws that permit the unlawful, which feeds usurers. Dealing with usurious banks is forbidden, unless a person is forced to open a current account or rent a safe deposit box to protect their money from theft, on condition that they close it as soon as an alternative becomes available. As for borrowing from them with interest for marriage or housing, it is not permissible except in cases of extreme necessity, when lawful alternatives are unavailable.