§ 153.050  GENERAL REQUIREMENTS.
   The minimum lot area, minimum width of lot, minimum depth of front yard, rear yard and minimum width of each side yard for each district shall be as shown in § 153.051.
   (A)   Lots or parcels which abut on more than one street shall provide the required front yards along each street.
   (B)   All structures and accessory buildings whether attached to the principal structure or not, and whether open or enclosed, including porches, carports, balconies, roof overhangs or platforms above normal grade level, shall not project into any minimum front, side or rear yard; nor into any required open space or buffer. Where multi-dwelling buildings (apartments, townhouses and the like) are to be built on one lot (or parcel) along with other buildings or structures, the required yards shall be construed to apply to each building as opposed to each dwelling unit.
   (C)   Any lot of record existing on the effective date of this chapter may be used for the erection of a structure conforming to the use regulations of the district in which it is located, even though its area and width are less than the minimum requirements of this chapter.
   (D)   A buffer including appropriate screening, is hereby required on each lot boundary of a parcel where due to: rezoning of the parcel, newly zoning the parcel, creation of a PUD on the parcel or, the granting of a conditional use or variance for the parcel; a difference in intensity of land use between the adjacent parcels will occur. On the lot or parcel where the change in intensity of land use occurs, new structures or uses shall not be located or conducted closer to any lot boundary of any other lot having a different intensity of land use value than the distance calculated by applying the following formula:
      (1)   Subtract the assigned intensity of land use values of the respective parcels using those prescribed in this chapter and, for the first increment the buffer shall be ten feet and an additional 15 feet of buffer will be added for each incremental change in value assigned for intensity of land use beyond the first change.
         (a)   The buffers shall be measured on a line perpendicular to each boundary and shall run parallel to those boundaries.
         (b)   Example: subtract the intensity land use of R-1 (value=2) from that of R-3 (value=4) and the difference (4-2=2) would be 2, and the buffer would be ten feet for the first increment plus 15 feet for the second increment, or a total of 25 feet (10 feet+15 feet=25 feet). This buffer, where applicable, shall be in addition to any required side or rear yards specified under this chapter and applies to a PUD.
      (2)   In any case nonresidential structures or uses shall not be located closer to any lot line of any other lot in any R Zoning District than the distance specified in the following schedule:
 
Use
Minimum Side or Rear Yard Abutting Any Lot in Any R District
Churches, schools and public or semi-public structures
40 feet
Off-street parking spaces and access drives for nonresidential use
20 feet
Recreation facilities, entertainment facilities, all business uses and all industrial uses
60 feet
 
   (E)   Where adjacent structures have front yard set back different from those required, the minimum front yard setback shall be the average of these existing structures.
(1988 Code, § 11.12-1)