82-321 - Special tower coverage and setback regulations LAST AMENDED 12/5/2024 The requirements set forth in Section 23-435 (Tower regulations) for any #building#, or portion thereof, that qualifies as a “tower” shall apply, except as modified in this Section. (a) At any level at or above a height of 85 feet above #curb level#, a tower shall occupy in the aggregate not less than 30 percent of the #lot area# of a #zoning lot#. However, any #story# located within the highest 15 percent of the tower may cover less than 30 percent of the #lot area# of a #zoning lot# provided that the gross area of any such #story# does not exceed 90 percent of the gross area of that #story# directly below the highest 15 percent of the tower. (b) At all levels at or above a height of 85 feet from #curb level#, the minimum required setback of the #street wall# of a tower shall be at least 15 feet from the #street line# of Broadway or Columbus Avenue, and at least 20 feet on a #narrow street#. (c) At least 60 percent of the total #floor area# permitted on a #zoning lot# shall be within #stories# located partially or entirely below a height of 150 feet from #curb level#. For the purposes of determining allowable #floor area#, where a #zoning lot# has a mandatory 85 foot high #street wall# requirement along Broadway, the portion of the #zoning lot# located within 50 feet of Broadway shall not be included in #lot area# unless such portion contains or will contain a #building# with a wall at least 85 feet high coincident with the entire #street line# of Broadway. For the purposes of determining the permitted tower coverage in Block 3, as indicated on the District Plan in Appendix A of this Chapter, that portion of a #zoning lot# located within 100 feet of the west #street line# of Central Park West shall be treated as if it were a separate #zoning lot# and the tower regulations shall not apply to such portion.