1135.02  HEIGHT AND BULK REGULATIONS.
   In any Residence C District, the following limitations and requirements shall apply:
   (a)    Height.  No building shall exceed seventy feet or six stories in height. Towers may be erected above such height, provided any such tower does not exceed one hundred and fifty feet or twelve stories in height above the ground level, and providing further that any such tower sets back from every street and lot line in addition to other yard and set-back requirements, herein specified, one foot for each three feet of height in excess of seventy feet.
   (b)    Rear Yards.  There shall be a rear yard on every lot which shall have a minimum depth of twenty feet which shall be increased by four feet for each additional story of the building above the second story.
   (c)    Side Yards. There shall be a side yard on each side of every building, other than an accessory building. The minimum width of any side yard shall be five feet which shall be increased by two feet for each additional story above the second  story.
   (d)    Set-back.  No building shall be erected, reconstructed or altered so as to project in any manner beyond a line which is distant from the street line the average distance therefrom of the buildings fronting on the same side of the street within the block at the time of the passage of Ordinance 2816, passed January 5, 1949. Where there were existing buildings at the time of the passage of Ordinance 2816, passed January 5, 1949 on only one side of the street within the block, the set-back line on the vacant side shall be the same as the improved side of the street within the block. Where there is no building fronting on either side of the street within the block, no new building shall be erected with its street wall or walls nearer than twenty-five feet to the street line; however, this provision does not include steps, uncovered porches and covered but unenclosed porches on the first story which do not extend more than ten feet beyond the front wall of the building. On a corner lot, the street frontages which are not opposite to the rear lot line, shall be exempt from the above provisions.
   (e)    Lot Area Per Family.  The minimum requirements as to lot area per family shall be as follows:
      One family dwelling, 3,500 square feet.
    Two family dwelling, 2,000 square feet.
      Row house, 1,250 square feet.
      (1955 Code. §1135.02)