No portion of a building in the R-3, R-4, R-4X1, or R-4X2 zones above the ground level shall exceed one hundred seventy five feet (175') in either width or depth. If a building exceeds one hundred seventy five feet (175') in width or depth belowground level, then any two (2) portions of the building aboveground level that would together exceed one hundred seventy five feet (175') shall be considered separate buildings with an assumed common lot line between them, and each portion shall be set back from such assumed common lot line as prescribed in section 10-3-2807 of this article. (Ord. 95-O-2239, eff. 7-7-1995; amd. Ord. 96-O-2266, eff. 10-18-1996; Ord. 98-O-2306, eff. 9-11-1999)