(a)        Except as otherwise provided in this Section, any large-scale residential development for which application is made for an authorization or special permit or modification thereto, in accordance with the provisions of this Chapter, shall be on a tract of land that at the time of application is all under the control of the applicant(s) as the owner(s) or holder(s) of a written option to purchase. Except as otherwise provided in this Section, no authorization or special permit or modification thereto, shall be granted for such large-scale residential development unless the applicant(s) acquired actual ownership (single fee ownership or alternate ownership arrangements according to the zoning lot definition in Section 12-10 for all zoning lots comprising the large-scale residential development) of, or executed a binding sales contract for, all of the property comprising such tract.

(b)        Notwithstanding the provisions of paragraph (a) of this Section, the following actions shall be permitted:

(1)        When a large-scale residential development is part or all of a designated urban renewal project, the City's urban renewal agency, or a person authorized by such agency, may make application for and may be granted authorizations or special permits under the provisions of this Chapter, even though such large-scale residential development does not meet the ownership requirements set forth in paragraph (a) of this Section. All parcels comprising such large-scale residential development shall be within the designated urban renewal area and subject to the urban renewal controls set forth in the approved urban renewal plan.

(2)        In the event that the urban renewal plan has expired, the owner(s) of a vacant parcel(s) within such large-scale residential development, if located in a former urban renewal area listed in this paragraph, (b)(2), may make application for and may be granted modifications of authorizations or special permits previously granted under the provisions of this Chapter with respect to such parcel(s), subject to the conditions of paragraph (b)(5) of this Section.

(3)        The owner(s) of a developed parcel(s) within a large-scale residential development located in a former urban renewal area listed in paragraph (b)(2), where at least 50 percent of such parcel(s) is located within a C1-9 or C2-8 District, may make application for, and may be granted, modifications of authorizations or special permits previously granted under the provisions of this Chapter, in order to utilize available floor area for commercial or community facility uses, subject to the conditions of paragraph (b)(5) of this Section and provided further that:

(i)        no residential use existing prior to July 23, 2008, located above the level of the ground floor may be changed to a non-residential use;

(ii)        the enlarged portion of the building shall be restricted to community facility uses and commercial uses listed in Use Groups 6A and 6C, provided that any ground floor community facility use, and any bank or loan office shall occupy not more than 25 feet of the wide street frontage, measured to a depth of 30 feet from the wide street line, and no community facility use shall be permitted above the level of the second story ceiling;

(iii)        any enlargement fronting upon Columbus or Amsterdam Avenue shall contain a number of establishments, such that the entire block front on Columbus or Amsterdam Avenue shall contain no fewer than three establishments, each with a separate entrance on Columbus or Amsterdam Avenue. The Columbus or Amsterdam Avenue frontage of any one such establishment shall not exceed 100 feet;

(iv)        the ground floor street wall of an enlargement located within C1-9 or C2-8 Districts shall be glazed with transparent materials which may include show windows, glazed transoms or glazed portions of doors. Such glazed area shall occupy at least 70 percent of the area of each such ground floor street wall, measured to a height of 12 feet above the level of the adjoining sidewalk or public access area;

(v)        required open space with appropriate circulation, seating, lighting and plantings shall be accessible and usable by all residents of the large-scale residential development;

(vi)        a plan, including elevations, shall be submitted showing the proposed building(s) and modification, and open space; and

(vii)        the enlargement enhances the streetscape and the design promotes a harmonious relationship with the existing buildings and contiguous blocks within the large-scale residential development.

In addition, any significant adverse impacts resulting from a development or enlargement pursuant to such modifications, considered in combination with developments or enlargements within the former urban renewal area listed in paragraph (b)(2), previously the subject of modifications under this paragraph, (b)(3), shall have been avoided or minimized to the maximum extent practicable by incorporating as conditions to the modification those mitigative measures that have been identified as practicable.

The provisions of paragraphs (b)(3)(ii) and (b)(3)(iii) shall not apply to enlargements of community facility uses and bank or loan offices existing prior to July 23, 2008, provided that such enlargement does not increase existing street frontage on Columbus or Amsterdam Avenues by more than 10 feet.

An application filed pursuant to this paragraph, (b)(3), shall be referred to the affected Community Board, and the City Planning Commission shall not grant any modification of an authorization or special permit pursuant thereto prior to 45 days after such referral.

(4)        For any large-scale residential development located in the Community District(s) listed in this paragraph, (b)(4), the owner(s) of a vacant parcel(s) may make application for and may be granted modifications of authorizations or special permits previously granted under the provisions of this Chapter with respect to such parcel(s), subject to the conditions of paragraph (b)(5).

(5)        Modifications of authorizations or special permits previously granted under the provisions of this Chapter, as permitted in paragraphs (b)(2), (b)(3) and (b)(4) of this Section, shall not:

(i)        result in the distribution of floor area from any zoning lot not coextensive with or included within such parcel(s); or

(ii)        increase the total allowable floor area on any zoning lot included within such parcel(s) beyond that amount permitted by the applicable district regulations.

Such modifications may include the withdrawal of such parcel(s) from the boundaries of the large-scale residential development, provided that such modification would not create a non-compliance within the large-scale residential development.

(6)        When a large-scale residential development is to be developed or enlarged through assemblage by any other governmental agency, other than the City’s urban renewal agency, or its agent, having the power of condemnation, authorizations or special permits may be applied for and may be granted under the provisions of this Chapter, even though such large-scale residential development does not meet the ownership requirements set forth elsewhere in this Section.

(7)        In the event that the urban renewal plan has expired, the owner(s) of a parcel(s) of land previously used as open space for a term of years that has expired within such large scale residential development, if located in a former urban renewal area listed in this paragraph, (b)(7), may make application for and be granted modifications of authorizations or special permits previously granted under the provisions of  this Chapter, where such modifications do not seek the distribution of floor area from any zoning lot not included within such parcel(s), for a development that includes a building and public open space permitted by the applicable district regulations. Such modifications shall result in a site plan that includes a building and public open space that are appropriately located and oriented with respect to other uses in the surrounding area.