(a)        On a zoning lot where there is an existing building to remain, the requirements governing height and location of street walls shall not apply within a volume defined by the rear wall of the existing building (W2), the front lot line (W1), the prolongations of the side walls (L) and a height of 125 feet above curb level.

If, after January 10, 1985, any demolition or destruction occurs within the volume defined, the requirements governing street wall height shall apply.

EXISTING BUILDING VOLUME FOR

MODIFICATION OF STREET WALL REQUIREMENTS

(b)        The City Planning Commission may authorize modifications in the required street wall location if the Commission finds that the existing buildings, or existing open areas serving existing buildings to remain on the zoning lot, would be adversely affected by the location of the street walls of the development, enlargement or alteration in a manner prescribed in paragraph (a) of this Section.