(a) In a Class U1 District, for every dwelling erected there shall be a side yard along each lot line other than a front line or rear line. Each single-family dwelling shall be deemed a separate structure and shall have side yards as above prescribed.
(b) In a Class U1-A1 or U1-A2 District, the least dimension of a side yard shall be twenty- five feet, and at least forty percent of the average width of the lot, as measured between the front line and the rear line of the main structure, shall be devoted to side yards.
(c) In a Class U1-A3 or U1-A4 District, the least dimension of a side yard shall be fifteen feet, and at least forty percent of the average width of the lot, as measured between the front line and rear line of the main structure, shall be devoted to side yards. (Ord. 3053. Passed 3-14-00.)