Section 121-331 - Street wall regulations
For all buildings , 100 percent of the width of street walls along a street frontage at the ground floor level shall be located within eight feet of the street line . For any story above the ground floor level , at least 70 percent of the width of street walls shall be located within eight feet of the street line and extend to at least a minimum base height of 60 feet, or the height of the building , whichever is less; or as modified by Section 121-332 (Base Height Regulations). Up to 30 percent of the aggregate width of street walls above the ground floor may be recessed beyond eight feet of the street line , provided that any such recesses deeper than 10 feet along a wide street or 15 feet along a narrow street are located within an outer court . In addition, the street wall location provision of this paragraph shall not apply along such street line occupied by a public plaza as set forth in Section 37-70 (PUBLIC PLAZAS), nor within 15 feet of a landmark building or other structure .