Except as otherwise provided in Section 17.52.090, no building or structure in a C-1 district shall have a height in excess of forty-five (45) feet, or in excess of thirty-five (35) feet if the building or structure is situated within fifty (50) feet of the boundary line of an R-1, R-2 or R-3 or R-S district. (Prior gen. code § 8-48.8)