If a nonconforming use has been changed to a conforming use, or if the nonconforming use of a building, structure or premises is discontinued for the time period specified below, the said use shall be considered abandoned, and said building, structure or premises shall thereafter be used only for a use permitted as an allowed outright use or as a conditional use in the district in which it is located:
A.
Residential uses in a commercial zoning district: five years, unless the building has been altered to the point that it is no longer suitable as a residence;
B.
All other uses: two years.
(Ord. 89-O-446 § 1. Formerly 17.120.030; Ord. 90-O-446.B § 3; Ord. 09-O-637 § 2)