Sec. 14-78. - Office and institutional district (OI).
   (a)   Intent. The regulations of the office and institution district (OI) are intended to provide for the development of general office uses, educational and research facilities, public service offices, institutional and their necessary support functions.
   (b)   Permitted uses. See Sec. 14-90 for table of permitted uses as a principal use in the office and institutional district.
   (1)   Additional specifications. 
      a.   Accessory uses and structures are permitted when located on the same lot as the principal use, within the zoned area.
      b.   Open storage shall be prohibited as a principal and/or accessory use.
   (2)   Alternative energy systems. Provisions of sections 14-121 and 14-122 shall apply.
   (c)   Conditional zoning districts. For the office and institutional district, a parallel conditional zoning district is authorized for establishment, pursuant to G.S. 160D-703. See section 14-90 for table of uses as a special use in the office and institutional special use district. Accessory uses and structures are permitted when located on the same lot as the principal use, within the zoned area.
   (1)   Additional specifications. 
      a.   Public/private utility facilities. Public works and public and private facilities such as water and sewage plants, transformer stations, transmission lines, pumping stations, water towers, and telephone exchanges, provided:
         (i.)   Such facilities are essential to the service of the area.
         (ii.)   No vehicles or materials shall be stored on the premises, and no offices shall be permitted.
         (iii.)   All buildings shall be set back at least 20 feet from all property lines and shall be designed and landscaped with a buffer strip in such a way as to blend in with the surrounding area.
         (iv.)   All dangerous apparatus shall be enclosed by a screen fence or wall at least eight feet in height.
   (d)   Minimum building setback requirements. The minimum building setback shall be as follows in an office and institutional district:
   (1)   From any arterial or collector street right-of-way, 40 feet.
   (2)   From any local street right-of-way, 20 feet.
   (3)   From any interior lot line adjacent to commercial or industrial zoning, ten feet.
   (4)   From any interior lot line adjacent to residential, 20 feet.
   (5)   From any access easement, 15 feet.
   (e)   Maximum building height requirements. The maximum building height for the office and institutional district:
   (1)   Adjacent to a residential zoning district shall be 40 feet.
   (2)   Adjacent to a nonresidential zoning district, no height restrictions.
(Ord. of 7-10-2000, § 4.4.5; Ord. of 7-9-2001; Amend. of 3-8-2004; Amend. of 7-12-2004, § B); Amend. of 12-06-2010; Amend. of 9-6-2011; Amend. of - - )
   Cross reference—Businesses, ch. 6.