169.08 SUPPLEMENTAL YARD AND HEIGHT REGULATIONS.
Any building, structure, or use hereafter erected, altered, or established shall comply with the general yard space requirements of the district within which it is located, except as specified herein.
   1.   Location of Required Yard. The required yard space for any building, structure, or use shall be contained on the same lot as the building, structure, or use and such required yard space shall be entirely upon land in a district in which the principal use is permitted.
   2.   Reduction or Sharing of Required Yards or Space Prohibited. No lot, yard, court, parking area, or other space shall be reduced in area or dimension so as to make said area or dimension less than the minimum required for this code. No part of a yard, court, parking area, or other space provided for any building or structure to comply with the provisions of this code shall be included as part of a yard, court, parking area, or other spaces required under this code for another building or structure.
   3.   Required Yards for Existing Buildings. No yards, now or hereafter provided, for a building existing on the effective date of this Zoning Ordinance shall subsequently be reduced below (or further reduced if already less than) the minimum yard requirements of this code for equivalent new construction.
   4.   Required Yards on Major Streets.
      A.   Major Streets. All applicable building setbacks and yard requirements set forth in this code shall be measured and determined from the existing street right-of-way.
      B.   Private Streets. All applicable building setbacks and yard requirements along private streets shall be measured from the nearest line of the access easement.
      C.   In all C, O-RP, and I-1 districts on lots fronting on two nonintersecting streets, a front yard must be provided on both streets.
      D.   On corner lots in all districts there shall be a front yard on both streets.
   5.   Transitional Yards. Where a lot is in a C or I-1 district and is next to an R district, the side or rear yard required in that R district must be provided along the boundary line.
   6.   Yards with More than One Principal Building. When two or more buildings are permitted on a lot, the required yards shall be maintained around the group of buildings.
   7.   RD Side Yards. In all RD two-family dwelling unit districts, only the side yard on the detached side of the dwelling will be required. No side yard will be required on the side of the dwelling located on the common lot line.
   8   Permitted Encroachments into Required Yards and Exceeding Maximum Building Height.
      A.   An encroachment is the extension or placement of an accessory structure or architectural feature into a required yard. Permitted encroachments are indicated in Table 169.08-1: Permitted Encroachments into Required Yards and Exceeding Maximum Building Height.
         (1)   Section 169.06 contains regulations on accessory buildings and uses not listed in Table 169.08, which may include additional permissions or restrictions for their permitted encroachment into yards.
         (2)   When an accessory structure or architectural feature regulated by Table 169-08 is prohibited from encroaching in a required yard, the structure or architectural feature may be located in the corresponding yard beyond the required yard unless specifically prohibited by the table.
         (3)   Encroachments shall be subject to the corner visual clearance.
      B.   In districts where a maximum height is imposed, such height limitations shall not apply to certain appurtenances and structures and are indicated in Table 169-08: Permitted Encroachments into Required Yards and Exceeding Maximum Building Height.