A present nonconforming use or occupancy not permitted under the provisions of this title may be continued, but the nonconforming use or occupancy shall not be expanded. A nonconforming use or occupancy existing at the time of the passage hereof may not be reconstructed or structurally altered to an extent exceeding an aggregate cost of fifty percent (50%) of the value of which such building is assessed on the records in the office of the county assessor unless such building is changed to conform to the provisions of this title. A nonconforming occupancy or use may not be changed unless changed to an approved use. Notwithstanding use, a variance may be issued to modify size, yard, or setback requirements for an otherwise conforming use or occupancy. Nothing in this title shall require the change of any building now constructed. (Ord. 749, 5-18-2015)