Rear yard depth may be reduced by ten percent from the required minimum depth on a lot which at the time of the enactment of this Zoning Code (Ordinance 340, passed December 19, 1966) is less than 100 feet deep, if the building is not higher than two and one-half stories and if the owner of record does not own adjoining property to the rear. However, no required rear yard shall be less than ten feet deep.
   (a)   Rear yards may be measured to the center of an adjoining alley, but in no case shall a building or structure be erected within less than six feet of such an alley.
   (b)   Structures or projections into rear yards may be permitted as follows: Fences, plantings or walls, not over five feet above the average natural grade; fire escapes, six feet from the building; and bays and balconies, not more than three feet from the building.  The sum of the lengths of such projections shall not exceed one-half of the width of the rear wall.
   (c)   Chimneys, flues, belt courses, leaders, sills, pilasters, lintels, ornamental features, cornices, eaves, gutters and other similar structures or projections into or over a required rear yard shall not extend more than one and one-half feet.
   (d)   Terraces, steps, uncovered porches or similar features shall not extend more than ten feet into a required rear yard, or be closer than six feet to an alley, or be within ten feet of a rear lot line, not an alley lot line, or be within six feet of an accessory building.
   (e)   Open or lattice-enclosed fire escapes, fireproof outside stairways and balconies opening upon fire towers projecting into a rear yard not more than five feet, may be permitted by the Building Inspector.
(Ord. 340.  Passed 12-19-66.)