1. A transaction consisting of two separate loans for the same borrower by the same lender. The initial loan is used to finance the construction of a new home; upon completion of construction, the loan is repaid by a second loan, which is a permanent mortgage on the home. The initial construction loan is usually an adjustable-rate mortgage, while the subsequent mortgage might be any one of the mortgage types available.
2. The simultaneous use of a first and second mortgage to finance a home. The first loan is usually made for 80% of the home's value and has a first lien position, while the second loan is usually for 10-20% of the home's value and has a second lien position. This transaction is frequently used to avoid having to pay private mortgage insurance. This type of combination loan is also known as a "piggy-back" or "80-10-10 transaction".