Loans from Muslims and non-Muslims Banks
Question :

Is it permissible to take a loan from Muslim or non-Muslim (private or state-owned) banks?

Answer :

It is not permissible to take a loan from a private bank that is wholly or partially owned by Muslims with a condition in the loan contract to pay interest to the bank. It is also not permissible to take a loan from a non-Muslim private bank. It is permissible to borrow from both kinds of banks if the loan agreement was without stipulation of any interest.
If the bank is owned by a government, then it is allowed to take the money without the intention of borrowing it, but with the intention of taking it on behalf of his Eminence and own it afterwards. The money paid will be treated like government taxes.

Mortgage
Question :

Most of the banks propose to their clients mortgage loans with interest payments. Is it permissible for Muslims to take these loans knowing that one will be obliged to pay interest for them?

Answer :

It is not allowed to take mortgage loans with interest from private banks. It is permissible from government banks without the intention of borrowing, but the individual collects the funds on behalf of his Eminence (may Allah prolong his life) and then takes ownership of them after that. Interest is then paid just like paying taxes to the government.