Mobile homes, trailers, house trailers, trailer coaches, and similar property used or intended to be used for residential, office, or commercial purposes and permanently affixed to real property under AS 34.85.150 are classified as real property for tax purposes unless expressly classified as personal property by ordinance. This section does not apply to house trailers and mobile homes that are unoccupied and held for sale by persons engaged in the business of selling mobile homes. In this section, “mobile home” has the meaning given to “manufactured home” in AS 45.29.102.