A. 
Buildings occupied in whole or in part, as defined in this chapter, shall comply with the requirements hereinafter set forth concerning occupancy, size, light and ventilation in order to provide a safe and healthful environment.
B. 
The term "accessory use" shall have a uniform meaning and shall apply in the same manner and under the same conditions or restrictions to all residential buildings.
Buildings, for the purpose of this chapter, shall be classified in respect to their occupancies as follows:
A. 
One- and two-family dwellings: Buildings containing one or two dwelling units with not more than one family in either one of such dwelling units.
B. 
Multiple dwellings:
(1) 
Buildings containing three or more dwelling units.
(2) 
Apartment houses.
(3) 
Garden apartments.
C. 
Accessory structures: Garages, carports and similar type structures on residential premises.
The maximum occupancy of a dwelling unit shall not exceed one person for each 100 square feet of floor area in the habitable spaces of said dwelling unit. For the purposes of this section, kitchens shall not be deemed habitable space. In any event, there shall not be more than three occupants, consisting of no more than two adults, together with one child under two years of age, in any one bedroom. Children under six months of age shall not be counted in determining the number of occupants in a dwelling unit.
A. 
It shall be prohibited to use for sleeping purposes any kitchen, nonhabitable space or public space.
B. 
It shall be prohibited in any dwelling to use any cellar space as habitable space.
A. 
Size.
(1) 
Habitable space shall have a minimum ceiling height of seven feet six inches over 50% of the floor area. The floor area where the ceiling height is less than five feet shall not be considered in computing floor area.
(2) 
A dwelling unit shall contain at least one habitable room having a minimum of 150 square feet of floor area and a minimum horizontal dimension of 10 feet.
(3) 
Kitchens shall have a minimum of 60 square feet of floor area and other habitable spaces shall contain not less than 80 square feet of floor area and shall have a minimum horizontal dimension of seven feet.
(4) 
Every alcove less than 60 square feet in area, except a cooking space or foyer, shall be deemed to be part of a habitable room. The area of the opening in the dividing partition between the alcove and the room shall be at least 80% of the wall area of such partition, measured on the alcove side, but not less than 40 square feet. The depth of such alcove shall not exceed 1/2 its width. The floor area of the alcove shall be added to the floor area of the room in determining light and ventilation requirements for the room. An alcove with an area of 60 square feet or more, but less than the required area of a habitable room, shall be separately lighted and ventilated, as required for habitable space.
B. 
Basements. Basements shall not be deemed habitable space where required windows are located only on one wall and the depth of the basement space exceeds four times its clear height.
C. 
Light and ventilation.
(1) 
Habitable space shall be provided with natural light through one or more windows, skylights or transparent or translucent panels, or any combinations thereof, that face directly on legal open spaces at least six inches above the adjoining finished grade or that are above a roof.
[Amended 9-5-2000 by L.L. No. 10-2000]
(2) 
Habitable space shall be provided with artificial light.
(3) 
Habitable space shall be provided with natural ventilation through openable parts of windows or other openings in exterior walls that face legal open spaces above the adjoining finished grade or above a roof, or through openable parts of skylights, providing total clear ventilation area equal to not less than 5% of the total floor area of each habitable space.
(4) 
Habitable space may also be provided with mechanical ventilation, in addition to natural ventilation.
D. 
Miscellaneous requirements.
(1) 
Dwelling units shall be separated from each other and from other spaces outside the dwelling unit.
(2) 
Sleeping rooms within dwelling units shall be separated from each other and from other spaces outside the sleeping rooms to provide privacy.
E. 
Attics. An attic may be converted to habitable space if the conversion satisfies all relevant requirements of the NYS Residential Building Code, as in effect at the time of the application.
[Added 10-25-2016 by L.L. No. 4-2016]
A. 
Height. Public space shall have a minimum height of seven feet six inches, measured from finished floor to finished ceiling.
B. 
Light and ventilation.
(1) 
Public spaces shall be provided with artificial light.
(2) 
In public stairs, stairways and passageways, artificial light shall be electric lighting available at all times so as to afford safe passage for occupants and users. Such lighting shall conform to the following: A sufficient number of fixtures shall be provided so that the distance between fixtures is not more than 30 feet and so that no wall is more than 15 feet distant from a fixture. Incandescent lighting shall be based on not less than 1/4 watt per square foot of floor area, except that each fixture shall have a lamp or lamps with a total of not less than 60 watts. Fluorescent lighting shall be based on not less than 1/10 watt per square foot of floor area, except that each fixture shall have a lamp or lamps of a total of not less than 40 watts. Where, under these formulas, the calculated wattage does not correspond to that of a standard lamp, the next larger size shall be used.
(3) 
Public spaces shall be provided with either natural ventilation, conforming to the requirements for habitable space, or with mechanical ventilation.
A. 
Height. Nonhabitable space, except crawl spaces and attics, in multiple dwellings shall have a minimum height of seven feet measured from floor to ceiling.
B. 
Toilet rooms and bathrooms.
(1) 
Toilet rooms and bathrooms in one- and two-family dwellings shall have provisions for privacy.
(2) 
Toilet rooms and bathrooms for dwelling units in multiple dwellings shall be located within the dwelling units and shall be accessible from any sleeping room without passing through any other sleeping room and shall have provisions for adequate privacy.
(3) 
Toilet rooms for employees in multiple dwellings shall be in separate rooms for each sex where there are five or more employees, shall be readily accessible to such employees and shall not open directly into any public kitchen or other public space used for the cooking or preparation of food.
(4) 
In one- and two-family dwellings, bathrooms and toilet rooms shall be provided with floors of moisture resistant material.
(5) 
In multiple dwellings, floors of bathrooms, toilet rooms and similar spaces shall be waterproof; such waterproofing shall extend six inches or more above floors except at doors, so that floors can be flushed or washed without leaking.
(6) 
In all dwellings, shower enclosures and bathtubs shall be maintained in a watertight condition.
C. 
Light and ventilation.
(1) 
Kitchenettes, bathrooms and toilet rooms shall be provided with artificial light appropriate for the use of such rooms.
(2) 
Laundry rooms, furnace rooms and similar nonhabitable space shall be provided with artificial light appropriate for the intended use of such rooms.
(3) 
Stairs shall be provided with artificial light to allow safe ascent or descent.
(4) 
Kitchenettes, bathrooms and toilet rooms shall be provided with ventilation in accordance with either of the following:
(a) 
Natural ventilation, as required for habitable space, except that such openable areas shall be not less than 1 1/2 square feet for bathrooms or toilet rooms and not less than three square feet for kitchenettes.
(b) 
Mechanical ventilation exhausting not less than 25 cubic feet per minute for bathrooms and toilet rooms and not less than 100 cubic feet per minute for kitchenettes.
(5) 
Spaces in multiple dwellings which contain central heat-producing, air-conditioning and other equipment or which are designed or used for the parking or storage of motor vehicles shall be ventilated directly to the outer air, and air from these spaces shall not be recirculated to other parts of the building.
(6) 
Ventilation shall be provided in unheated attics, spaces below flat roofs and crawl spaces. Location and net areas of ventilation openings shall be such as to minimize deterioration of structural members from condensation or other causes, in conformity with generally accepted standards.
A. 
Safe, continuous and unobstructed exit shall be provided from the interior of the building to the exterior at street or grade level.
B. 
Exits shall be arranged, constructed and proportioned so that occupants may escape safely from the building in case of emergency.
C. 
In one- and two-family dwellings, in addition to a primary exit from the building, there shall be provided a secondary exit or, in lieu thereof, one or more exit openings for emergency use. A second means of egress from a cellar shall be permitted only through an areaway via a ladder to grade.
[Amended 4-23-2002 by L.L. No. 9-2002]
D. 
In multiple dwellings approved exits shall be provided.