1153.01 SIDE YARDS IN RESIDENCE DISTRICTS.
   (a)   In a Class U1, U2 or U3 District, for every building erected, there shall be a side yard along each lot line other than a front line or rear line.
   (b)   Each single-family dwelling, each two-family dwelling and each apartment house shall be deemed a separate building, and shall have side yards as above prescribed, except that two single-family dwellings may be attached as a double house and be considered a single building where permitted in a Class U1 or U2 District.
   
   (c)   The least dimension of a side yard shall be not less than three feet, and the total width of side yards shall be not less than eleven feet. However, in the event of an attached garage, the combined side yards shall be not less than ten feet; in the latter case, the width of the respective sides shall be approved by the Board of Zoning Appeals.
   (d)   For an apartment house in a U3 District, the least dimension of each side yard shall be not less than ten percent (10%) of the average width of the lot, but such least dimension need not exceed twelve feet.
   (e)   Under each subsection of this section, the least dimension shall, in no case, be less than one-sixth of the height of the building. (Ord. 121-1962. Passed 12-17-62.)