In Subarea A2, as shown on Map 1 (Special Inwood District – Subdistricts and Subareas) in the Appendix to this Chapter, for shoreline adjacent lots, the following height and setback regulations shall apply:

1. Street wall location
   
   The street wall location provisions of paragraph (a) of Section 35-631 shall apply except that street walls shall extend to at least the minimum base height set forth in paragraph (b) of this Section, or the height of the building, whichever is less.
2. Base height and setbacks
   
   The minimum base height shall be 60 feet on all street frontages. Within R9A Districts, or C1 or C2 Districts mapped within R9A Districts, the maximum base height shall be 105 feet. Within R8 Districts, or C1 or C2 Districts mapped within R8 Districts, the maximum base height before setback shall be 105 feet if the building’s maximum overall height does not exceed 155 feet, or 85 feet if a building is developed with a tower in accordance with the regulations of paragraph (e) of this Section.
   
   At a height not lower than the minimum base height nor higher than the maximum base height specified for the applicable district, a setback with a minimum depth of 10 feet shall be provided from the street wall of the base. Such setbacks may be modified in accordance with the provisions of Section 23-433.
3. Within 50 feet of the shoreline
   
   Within 50 feet of the shoreline, the height of a building along 30 percent of the length of a zoning lot, as measured parallel to Ninth Avenue, shall be limited to a maximum height of 30 feet, and the height along the remaining 70 percent may rise to a maximum height of 85 feet.
4. Maximum transition height
   
   After the required setback, buildings may rise to a maximum transition height of 155 feet. However, for portions of buildings exceeding the maximum base height with a gross area of a story of 10,000 square feet, or more, exclusive of any permitted dormers, setbacks shall be taken at any point above 125 feet to achieve a footprint reduction of 10 percent from stories below 125 feet. Any portion of a building that exceeds the maximum transition height shall be considered a tower and subject to the provisions of paragraph (e) of this Section.
5. Tower regulations
   
   Any portion of a building that exceeds the maximum transition height shall be subject to the following tower provisions:
   1. the gross area of any story shall not exceed 10,000 square feet, except that any dormers provided within the setback area shall not be included in such gross area;
   2. the gross area of any story located above 205 feet shall not exceed 90 percent of the gross area of that story located directly below a height of 205 feet;
   3. no portion of such tower shall be located within 80 feet of the shoreline;
   4. the width of such tower shall not exceed 100 feet, as measured parallel to Ninth Avenue. Such width shall be measured in plan and shall include the total width of the combined lot coverage of all stories above 125 feet; and
   5. the maximum height of such tower shall not exceed 245 feet.

Zoning lots with a lot area in excess of 1.5 acres may contain a second tower, provided that the heights of the two towers differ by at least 50 feet from each other, and provided that the combined width of the towers does not exceed 140 feet, as measured parallel to Ninth Avenue. Such width shall be measured in plan and shall include the total width of the combined lot coverage of all stories above 125 feet.