62-344 - Developments on piers LAST AMENDED 12/5/2024 In all districts, the underlying height and setback regulations shall be inapplicable to #developments# on #piers#. In lieu thereof, the provisions of this Section shall apply. The #base plane# of a #pier# shall be the elevation of the finished surface of the #pier#, below which no portion of a #building or other structure# penetrates, except for the supporting structure, plumbing or utility lines. In the event portions of a #pier# have different surface elevations, the surface elevation of at least 50 percent of the #pier# shall be used to establish the #base plane#. The height of all #buildings or other structures# on #piers# shall be measured from the #base plane#. For #buildings# with pitched roofs, maximum #building# height shall be measured to the midpoint of such pitched roof. The obstructions permitted pursuant to Sections 23-41, 24-51, 33-42 or 43-42 shall apply. In addition, a dormer may penetrate a required setback area above a height of 30 feet provided the aggregate width of dormers on any given #building# wall does not exceed 50 percent of the width of such #building# wall. (a) Height and setback regulations on #piers# The height of a #building or other structure# on a #pier# shall not exceed 30 feet. However, where a setback at least 15 feet deep is provided, the maximum height of a #building or other structure# shall be 40 feet. Such required setback shall be provided at a minimum height of 25 feet and a maximum height of 30 feet, and may be reduced to 10 feet in depth along any portion of the #building or other structure# fronting on an open area of the #pier# having a dimension of at least 40 feet measured perpendicular to such fronting portion. In addition, wind energy systems shall be allowed, provided such a system does not exceed a height of 85 feet, as measured from the base plane to the highest point of the wind turbine assembly or, when located above a roof of the #building#, a height of 55 feet, as measured to the highest point of the wind turbine assembly, whichever is higher. (b) #Building# width and spacing regulations on #piers# The maximum length or width of any #building or other structure# on a #pier# shall be 200 feet. The provisions of Section 23-371 (Distance between buildings) shall be inapplicable on #piers#. In lieu thereof, the minimum distance on a #pier# between any two #buildings or other structures# that do not #abut# shall be 100 feet. However, such limitations shall not apply to any #building or other structure#, no portion of which exceeds 30 feet in height. Permitted obstructions above the #base plane# within such required open areas between #buildings or other structures# shall be limited to those allowed above the lowest level of a #visual corridor# pursuant to Section 62-513 (Permitted obstructions in visual corridors), except that freestanding #accessory# #buildings or other structures# shall also be permitted provided they do not exceed a height of 30 feet and a total area, in aggregate, of 900 square feet. A minimum spacing of 15 feet shall be provided between such #accessory# #buildings or other structures# and any other #building or other structure# on the #pier#. (c) Modification of #pier# #bulk# regulations Modification of the regulations of this Section involving the height and setback or width and spacing of #buildings or other structures# on #piers# shall only be allowed by special permit or authorization of the City Planning Commission pursuant to Sections 62-835 (Developments on piers or platforms), 74-711 (Landmark preservation in all districts), 74-79 (Transfer of Development Rights From Landmark Sites) or 75-24 (Bulk Modifications Associated With a Transfer of Development Rights From Landmark Sites), as applicable.