A. There shall be a rear yard upon each lot in an R-2 zone behind every main building of not less than twenty-five feet or twenty percent of the depth of the lot, whichever is less; provided, however, the rear yard may be reduced to five feet if not more than fifty percent of the lot is covered by buildings or structures.

B. For multiple-family dwellings only, where the rear property line separates a lot in an R-2 zone from an adjacent lot zoned R-1, E, MH or a PUD or R-2 project of one family character with private rear and/or side yards, the rear yard shall not be less than ten feet for the first story and twenty-five feet for the second and additional stories. (Ord. 3681 § 2, 1995; Ord. 2980 § 1, 1985; prior code § 17.15.060)