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SEC. 51A-4.408.   MAXIMUM BUILDING HEIGHT.
   (a)   Special height provisions.
      (1)   Structures for utility and public service uses and institutional uses may be erected to any height consistent with the Federal Aviation Administration air space limitations, residential proximity slope height restrictions, and the building code. Exceptions:
         (A)   No portion of a structure that exceeds the maximum structure height specified in the district regulations (Divisions 51A-4.100 et seq.) may be located above a residential proximity slope. See Section 51A-4.412.
         (B)   Local utility transmission and distribution lines and supporting structures are exempt from residential proximity slope height restrictions.
         (C)   A mounted cellular antenna, as defined in Paragraph 51A-4.212(10.1), attached to a utility structure is exempt from residential proximity slope height restrictions if the utility structure is greater than 65 feet in height. For purposes of this subparagraph, a utility structure means an electrical transmission distribution tower, an elevated water storage tank, and any other structure operated by a municipality, a transit authority, or a certificated, franchised, or licensed utility company in connection with provision of the utility.
         (D)   A tower/antenna for cellular communication, as defined in Paragraph 51A-4.212(10.1), is exempt from residential proximity slope height restrictions if a specific use permit is required, or if a modification to an existing tower/antenna for cellular communication use is modified in a manner that does not substantially change the physical dimensions of the existing tower/antenna for cellular communication or its auxiliary building. A modification substantially changes the physical dimensions of an existing tower/antenna for cellular communication or its auxiliary building if it meets any of the criteria listed in 47 C.F.R. §1.40001(b)(7), as amended.
      (2)   In a district in which building height is limited to 36 feet or less, the following structures may project a maximum of 12 feet above the maximum structure height specified in the district regulations (Divisions 51A-4.100 et seq.):
         (A)   Structures on top of a building:
            (i)   Elevator penthouse or bulkhead.
            (ii)   Mechanical equipment room.
            (iii)   Cooling tower.
            (iv)   Tank designed to hold liquids.
            (v)   Ornamental cupola or dome.
            (vi)   Skylights.
            (vii)   Clerestory.
            (viii)   Visual screens which surround roof mounted mechanical equipment.
            (ix)   Chimney and vent stacks.
            (x)   Amateur  communications tower.
            (xi)   Parapet wall, limited to a height of four feet.
         (B)   Structures at grade level:
            (i)   Amateur  communications tower.
Note:  The heights allowed in Subsection (a)(2) are subject to any residential proximity slope height restrictions that may be contained in the district regulations for a particular district. (See Divisions 51A-4.100 et seq.).
      (3)   The maximum building height requirements in a planned development district are controlled by the planned development district regulations.
      (4)   In single family, duplex, townhouse, MF- 1(A), MF-1(SAH), MF-2(A), and MF-2(SAH) districts:
         (A)   no dormer eaves may project above the maximum structure height specified in the district regulations (Divisions 51A-4.100 et seq.); and
         (B)   the highest point of a structure with a gable, hip, gambrel, or dome roof may not project more than 12 feet above the maximum height specified in the district regulations (Divisions 51A-4.100 et seq.).
   (b)   Schedule of maximum building heights.  Except as otherwise provided in this section, a person shall not erect, alter, or convert any structure or part of a structure to exceed the maximum height standards in the district regulations (Divisions 51A-4.100 et seq.). A schedule of maximum building heights is contained in Section 51A-4.410.
   (c)   FAA Height Restrictions.  To protect navigable airspace, no structure shall be erected, altered, or maintained at a height in excess of limits established by Federal Aviation Administration regulations.  (Ord. Nos. 19455; 20037; 21663; 22639; 24543; 26578; 28072; 29984 )