1. Yard requirements shall be set forth under the Schedule of Lot, Yard, and Bulk Requirements for each zoning district. Front, side and rear yards shall be provided in accordance with the regulations hereinafter indicated and shall be unobstructed from the ground level to the sky, except as herein permitted.
2. No part of a yard or other open space or off-street parking or loading space required in connection with any building for the purpose of complying with this Zoning Code shall be included as part of a yard, open space, or off-street parking or loading space required for another building and or lot.
3. No yard or lot existing at the time of passage of Zoning Code shall be reduced in dimension or area below the minimum requirements set forth herein. Yards or lots created after the effective date of this Zoning Code shall meet the minimum requirements herein.
4. All accessory buildings when connected to the principal building (e.g., attached garages) shall comply with the yard requirements of the principal building, unless otherwise specified.
5. The Zoning Administrator may permit a variation in front yard setbacks to allow new or relocated structures to conform to the average existing setback provided that: (i) more than 40 percent of the frontage on one side of a street between intersecting streets is occupied by structures on the effective date of this Zoning Code; and (ii) a minority of such structures have observed or conformed to an average setback line. See illustration for different provisions:
6. The Zoning Administrator
may permit a variation in rear yard setbacks to allow for new or relocated detached garages to conform to the average existing setback provided that: (i) more than 40 percent of the frontage on one side of an alley between intersecting streets is occupied by structures on the effective date of this Zoning Code, and (ii) a minority of such structures have observed or conformed to an average setback line. However, in no case shall this be permitted when Section 165A.22(8) of this chapter applies.
7. Where 40 percent or more of the frontage on one side of a street between two intersecting streets is developed and the buildings on this side of a block have developed and observed a front yard setback greater than the depth herein required, new buildings shall not be erected closer to the street than the average front yard so established by the existing buildings, provided that no building shall be required to have a front yard setback greater than 50 feet.
8. Any side or rear yard in a residential district which is adjacent to any existing industrial or commercial use shall be no less than 25 feet and shall install and maintain landscaping and planting suitable to provide effective screening.
9. Any yard for a commercial or industrial use located within any Commercial or Industrial Zoning
District that is adjacent to any residential use or district shall be increased to 40 feet and shall contain landscaping and planting suitable to provide effective screening, except in the Downtown Commercial District. Included in the increased yard, a solid or semi-solid fence or wall at least six feet (but not more than eight feet high) shall be provided adjacent to an adjoining residential district unless the adjacent residential district and industrial district are separated by a street right-of-way. Said fence shall:
A. Be maintained in good condition.
B. Be constructed of commercially available fencing.
C. When exceeding six feet in height, be required to be setback from the property line by one foot for every additional foot of height.