As used in this article, the following terms shall have the following meanings:
(1) LENDER. A person who holds a mortgage, lien, deed of trust, or other security interest in property. The term includes an assignee, receiver, or other transferee of the interest.
(2) RESIDENTIAL REAL PROPERTY. Any of the following:
a. A single-family house.
b. A duplex, triplex, or quadraplex.
c. A unit in a multi-unit residential structure in which title to an individual unit is transferred to the owner of the unit under a condominium or cooperative system.