SEC. 51-4.408. MAXIMUM BUILDING HEIGHT.

   (a)   Special height provisions.

   (1)   Structures for utility and service uses and institutional uses may be erected to any height consistent with the Federal Aviation Administration air space limitations and the building code, if setbacks are provided as required by Sections 51-4.401, 51-4.402, and 51-4.403. However, local utility transmission and distribution lines and supporting structures, and, as specified in this paragraph, mounted cellular antennae are exempt from the setbacks required by Sections 51-4.401, 51-4.402, and 51-4.403. A mounted cellular antenna, as defined in Section 51-4.202(12), attached to a utility structure is exempt from the setbacks required by Sections 51-4.401, 51-4.402, and 51-4.403 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.

      (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 height specified in Section 51-4.410:

         (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; and

            (xi)   parapet wall, limited to a height of four feet; and

         (B)   structures at grade level:

            (i)   amateur communications tower.

      (3)   The maximum building height requirements in a planned development district are controlled by the planned development district regulations. The maximum permitted height in a matrix district is established by the city council at the time the district is created.

      (4)   In single-family, duplex, townhouse, MF-1, and MF-2 districts:

         (A)   no dormer eaves may project above the height specified in Section 51-4.410; 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 height specified in Section 51-4.410. (See illustrations in Figure 1.)

FIGURE 1
ILLUSTRATION OF SECTION 51-4.408(a)(4)

(Insert diagram here)

de   =   dormer eaves.

e   =   the lowest eaves of the structure.

g   =   grade (the average of the finished ground surface elevations measured at the highest and lowest exterior corners of the structure)

g1 1    =   the lowest finished ground surface elevation at an exterior corner of the structure.

g2 2    =   the highest finished ground surface elevation at an exterior corner of the structure.

h1 3    =   the vertical distance measured from grade to the midpoint of the vertical dimension between the lowest eaves and the highest ridge of the structure.

h2 4    =   the vertical distance measured from grade to the highest point of the structure.

r   =   the highest ridge and the highest point of the structure.

s   =   a sloping ground surface.

The height specified in Section 51-4.410 plus 12 feet is the maximum permitted vertical distance measured from grade to the highest point of the structure.

Dormer eaves may not project above the height specified in Section 51-4.410. (Ord. 18481)

      (5)   In an SC district, the following additional height regulations apply:

         (A)   The maximum building height in an SC district is 120 feet unless the SC district boundary line does not touch at any point the boundary line of a zoning district in which building height is limited to less than 240 feet, in which case the maximum building height in the SC district is 240 feet.

         (B)   All portions of a building within 330 feet of private property in an R, R(A), D, D(A), TH, TH(A), or CH district, or within 330 feet of that portion of a planned development district restricted to single-family and/or duplex uses, are limited to 60 feet in height. The distance measured is the shortest distance between the building and the private property.

         (C)   For purposes of this subsection, “private property” means any property not dedicated to public use, except that "private property" does not include:

            (i)   a private street or alley;

            (ii)   property on which a utility and service use, as defined in Section 51-4.202, is being conducted as a main use; and

            (iii)   a railroad right-of-way.

      (6)   In an NO, LO, MO, or GO district in which building height is limited to 35 feet or less, the structures in Subsection (a)(2) may project a maximum of four feet above the maximum permitted height established for the district by the city council.

   (b)   Schedule of maximum building heights.

      (1)   Except as 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 Section 51-4.410. (Ord. Nos. 18481; 18597; 18849; 19455; 21000; 27404; 28072)

 

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