Pre-approval is part of your Tower mortgage loan application. A Tower pre-approval letter shows your financing has been credit approved, and strengthens your offer over other bidders. In some areas, real estate agents require a pre-approval letter before showing a buyer a house or submitting an offer to the seller. When you have a pre-approval letter from Tower, you will know how much house you can afford before you start looking. Use the online mortgage application to apply for pre-approval