No building shall hereafter be erected, enlarged or altered unless, as so erected, enlarged or altered, it shall comply with the setback provisions of this article and unless the lot on which such building stands shall have a rear yard, the location, area and use of which shall comply with the setback and other provisions of this chapter.

Every principal building on a lot in any Residence C District shall set back from the rear lot line at least 20 feet, if three stories in height, and at least 15 feet, if less than three stories in height, except that, in the case of a lot which has been less than 100 feet in depth at all times since November 8, 1922, the required setback shall be reduced by six inches for each foot that the depth of such lot has, throughout that period, been less than 100 feet, provided that no such setback shall be less than 15 feet.

Except in Village Center Area Districts, every building in any business district shall set back at least 10 feet from the rear lot line of the lot on which it stands, except that the part of such building nearest the rear lot line may be at least 50 feet from the front lot line, and no setback from the rear lot line shall be required if such rear lot line adjoins the right-of-way of an operating railroad, all subject to the condition that, if any part of such building is used for residence purposes, such building shall be set back from the rear lot line at and above the level of the lowest story used for residence purposes, at least as much as the setback required in § 310-44 of this Code for a building of the same height in a Residence C District. No specific minimum required rear yard setbacks are established within the Village Center Area Districts except that where the rear yard of a lot adjoins a lot in any Residence A or C District which is in residential use, every building shall be set back at least one foot for each one foot that the building exceeds the height of existing grade at the closest point of the rear line. Other than as set forth above, the Planning Board, in connection with its review of site plans, shall establish such setbacks as it may determine necessary for purposes of appropriate site design, safety of pedestrian and traffic circulation, the maintenance of adequate separation between commercial uses and neighboring properties in residence districts and in consideration of any special setbacks which may have been previously established by the Village to protect adjacent residential areas. Within any setback area established by the Planning Board, said Board may require landscaping of such type and extent as it shall determine appropriate to provide adequate screening from neighboring properties and streets and to further the design guidelines as set forth herein.

Every building in a Business C District shall set back from any rear lot line which is also a residence district boundary line at least 50 feet, of which not less than the first 20 feet contiguous to the residence district boundary line shall be landscaped.

Every nonresidential building hereafter erected or enlarged on a lot in any Residence A District shall set back from the rear lot line at least such distance as may be prescribed by the Planning Board pursuant to Chapter 251, Site Plan Review, of this Code.