All stories that partially or wholly exceed the applicable maximum heights set forth in Section 87-322 (Base heights and transition heights) shall be considered a “tower” and may exceed such transition height only in accordance with the tower provisions of this Section.
(a) Maximum number of towers
For zoning lots with less than 130,000 square feet of lot area, only one tower shall be permitted. For zoning lots with 130,000 square feet of lot area or more, not more than two towers shall be permitted. The minimum separation between any two towers on the same zoning lot shall be 60 feet.
All towers shall comply with the applicable setback provisions set forth in paragraph (b) of Section 87-322.
The dormer provisions of paragraph (c)(1) of Section 23-621 (Permitted obstructions in certain districts) shall not apply to the tower portion of a building. In lieu thereof, up to 50 percent of the width of the street wall of a tower shall be permitted to encroach into a required setback area, except in setback areas along the shore public walkway.
(c) Maximum tower size
Each story of a tower shall not exceed a gross area of 10,000 square feet, except that any encroachment into a setback area provided in accordance with paragraph (b) of this Section need not be included in such gross area.
(d) Maximum tower width
On Parcels 1, 3, 4 and 7, as shown on Map 1 in the Appendix to this Chapter, the maximum width of any story of a tower facing the shoreline shall not exceed 130 feet, and on Parcel 2 the maximum width of any story of a tower facing mapped parkland shall not exceed 100 feet.
(e) Maximum height of towers
For zoning lots with 100,000 square feet or less of lot area, the maximum height of a tower shall be 300 feet, and for zoning lots with more than 100,000 square feet of lot area the maximum height of a tower shall be 400 feet.
However, for zoning lots with two towers, such maximum tower height of 400 feet shall apply to only one tower and a maximum tower height of 260 feet shall apply to the second tower. There shall be a height differential of at least 40 feet between any two towers on a zoning lot.
(f) Tower top articulation
The uppermost three stories of a tower, or as many stories as are located entirely above a height of 300 feet, whichever is less, shall have a lot coverage not exceeding 90 percent of the lot coverage of the story immediately below such stories.