All accessory off-street parking spaces on the ground floor level of a building shall be wrapped by floor area in accordance with paragraph (a) or, where applicable, screened in accordance with applicable provisions of paragraph (b) of this Section.

(a)        Along typical street wall frontages

For the ground floor level, or portions thereof, of buildings with a street wall width of 100 feet or less along a street frontage, any portion of an accessory off-street parking facility that is located above curb level, except for permitted entrances and exits, shall be located behind permitted floor area so that no portion of such facility is visible from adjacent public sidewalks or publicly accessible areas. Such floor area shall have a minimum depth of 15 feet, as measured perpendicular to the street wall of the building.

(b)        Along wide street wall frontages

For portions of ground floor levels of buildings with a street wall width exceeding 100 feet along a street frontage, at least 100 feet of such frontage shall comply with the provisions of paragraph (a) of this Section. Any portion of such an accessory off-street parking facility that is located above curb level within the portion of such ground floor level street wall in excess of 100 feet, may either be wrapped by floor area in accordance with paragraph (a) of this Section, or shall be subject to the following design requirements:

(1)        any non-horizontal parking deck structures shall not be visible from the exterior of the building in elevation view;

(2)        opaque materials shall be located on the exterior building wall between the bottom of the floor of each parking deck and no less than three feet above such deck; and

(3)        a total of at least 50 percent of such exterior building wall, or portion thereof, with adjacent parking spaces shall consist of opaque materials which may include permitted signs, graphic or sculptural art, decorative screening or latticework or living plant material.