As used in this article, the following terms shall have the meanings indicated:
ACCESSORY DWELLING UNIT
A separate dwelling unit incorporated within or to become part of an existing detached one-family dwelling which dwelling also contains a primary dwelling unit.
CELLAR
That portion of a building which is partly or completely below grade and having at least 1/2 of its height below grade.
DWELLING UNIT
A room or group of rooms within a building forming a single habitable residential unit with permanent facilities for living, sleeping, cooking, eating and sanitation.
FLOOR AREA
The sum of the gross horizontal areas of the several floors of a dwelling, excluding garage areas and cellar floor areas. Such gross horizontal areas shall be measured from the outside walls of the dwelling, without deduction for hallways, stairs, closets, thickness of walls, columns or other features.
PERSON
A natural person only and not a corporation, partnership or other similar entity.
PRIMARY DWELLING UNIT
The main dwelling unit constituting the space remaining in such dwelling after the creation of an accessory dwelling unit.