In all districts, the underlying permitted obstruction regulations shall be modified by this Section.

(a)        Balconies

Unenclosed balconies complying with the provisions of Section 23-132 (Balconies in R6 through R10 Districts) may encroach into any required open area on the zoning lot. However, balconies that encroach into waterfront public access areas shall be regulated by the provisions of paragraph (a)(1) Section 139-51 (Area-wide Modifications).

(b)        Dormers

Above the maximum base height, dormers shall be permitted to encroach into a required setback area, except setback areas adjoining tower portions of buildings and setback areas facing waterfront public access areas, provided that:

(1)        the aggregate width of all dormers does not exceed 50 percent of the width of the street wall of the highest story entirely below the maximum base height;

(2)        the aggregate width of all dormers with a depth exceeding seven feet does not exceed 30 percent of the width of the street wall of the highest story entirely below the maximum base height.

Such dormers need not decrease in width as the height above the maximum base height increases.