Interior yard space shall be provided on each lot equal to at least 15% of the lot area, or 900 square feet, whichever is less, and shall be completely open from ground to sky except for a patio, pergola, or a roof or balcony overhang not exceeding 30 inches.  Interior yard space may include all of that open area from the required front yard setback line to the rear property line which has a minimum dimension of 10 feet by 15 feet.
(`64 Code, Sec. 34-42.1)  (Ord. No. 893, 1019, 1777, 1611)