In an Apartment A District the following regulations shall apply. No building may be erected or used and no lot or premises may be used except for:

No multiple dwelling shall contain more than 24 apartments to house 24 families.

The minimum lot area for multiple dwellings shall be 1,500 feet per family, but in no event shall the lot area be less than 7,500 square feet.

Where a multiple dwelling is erected on a lot abutting a residence district of higher classification, a minimum side and/or rear yard of 25 feet abutting said district will be required.

No multiple dwelling shall exceed three stories, with a maximum height of 45 feet.

In the case of a building other than one used for dwelling purposes, no building or part thereof shall exceed three stories, with a maximum height of 45 feet, except a church spire or belfry.

The building area shall not exceed 35% of the lot area.

Each multiple-dwelling unit or apartment shall provide a minimum clear floor area of the following square footage:

There shall be a front yard, the depth of which shall not be less than 30 feet.

On a corner lot, a front yard shall be required on each street, and unless the building is controlled by § 248-74, the front yard on the narrower street frontage shall be not less than 30 feet in depth and the other front yard shall be not less than 20 feet in depth, and if the street frontages are equal, a minimum front yard of 30 feet in depth shall be required on each street front.

The minimum front-yard depth shall be the same as the average front-yard depths of the existing buildings within 200 feet on each side of the lot and within the same block front and district No front yard shall be required to have a depth greater than 40 feet.

On an interior lot, a multiple dwelling shall have two side yards, one on each side of the main building, each of which shall be no less than 20 feet in width.

When multiple dwellings are grouped in the same lot or plot, the unobstructed open space between the exterior wall of such building shall be not less than 30 feet.

On a corner lot a multiple dwelling shall have only one side yard abutting an interior lot adjacent thereto, said side yard to have a minimum width of 20 feet. The other side yard fronting on the street shall be considered a front yard and shall conform to the provisions of § 248-73.

In the case of a multiple dwelling there shall be a rear yard the depth of which shall not be less than 25 feet.

No apartment house or multiple dwelling as provided for herein shall be permitted unless provided with municipal sewerage or unless an independent sewage disposal plant, approved by the Nassau County Department of Health, is constructed for the sanitary disposal of sewage of such buildings.

No building shall be constructed on a lot having a width and a frontage of less than 75 feet, except that where a lot fronts on a turnaround in a subdivision the Planning Board may reduce this required width and frontage to not less than 1/2 the requirement.

Except for single-family dwellings, public schools, municipal uses of the Village of Westbury and accessory uses permitted thereto, and except as exempted by § 248-252 of this chapter, no building permit shall be issued and no building or use shall be established, except in conformity with a site development plan or special use permit, as appropriate, approved in accordance with Articles XXVIII and XXIX of this chapter.