(1) Occupied Area. Not more than sixty percent (60%) of the lot area shall be occupied by buildings.

(2) Open Area. The open area shall not be less than forty percent (40%) of the area of the lot and shall consist of at least the required minimum front, rear and side yards, as provided in subsection 14-604(5) herein.

(3) Minimum Lot Area. The minimum lot area shall be one acre.

(4) Building Setback Line.

(a) The building setback line shall be thirty (30) feet from all street lines, except that the loading and unloading portion of a building shall be set back no less than fifty (50) feet from all street lines.

(.1) No fences shall be permitted in the setback area.

(5) Yards.

(a) Front Yards. The required minimum depth of the front yard shall be the depth required between the street line and the building setback line, as specified in subsection 14-604(4) herein.

(b) Side Yards. Each building shall have two (2) side yards neither of which shall be less than fifteen feet in width; provided that where such building is located on a corner, the side yard on the intersecting street shall be adjudged a front yard and its width shall not be less than the setback required for front yards as specified above; except that in the case of a property line bordering upon a railroad right-of-way, such distance shall be not less than ten feet.

(c) Rear Yards. The minimum depth of a rear yard shall be fifteen feet, except that in the case of a property line bordering upon a railroad right-of-way, such distance shall be not less than ten feet.