Every building shall be designed, constructed, and equipped to provide adequate light and ventilation.
All buildings shall face a street or public alley or a private street.
Windows must cover 10% or 20% of the floor area.
Courtyard is a portion of a yard which the permitted limit of paving/hardscaping shall not exceed 50% of the area of the yard.
Courts, yards, and light wells shall be measured clear of all projections from the walls except for roof leaders, wall copings, sills, or steel fire escapes not exceeding 1.20 meters in width.
The minimum horizontal dimension of the court shall be not less than 2.00 meters. All inner courts shall be connected to a street or yard, either by a passageway with a minimum width of 1.20 meters or by a door through a room or rooms.
Artificial Ventilation
The ceiling height must be at least 2.40 meters.
Artificial Ventilation for Two Storey or More
− First Storey has a minimum ceiling height of 2.70 meters.
− Second and succeeding storeys must have a headroom clearance of 2.10 meters above finished floor.
Natural Ventilation
The ceiling height must be at least 2.70 meters.
Mezzanine floors shall have a clear ceiling height not less than 1.80 meters above and below it.
Kitchen
3.00 sq. meters or at least a dimension of 1.50 meters
Human Habitations ▪
6.00 sq. meters or at least a dimension of 2.00 meters
Bath and Toilet ▪
1.20 sq. meters or at least a dimension of 0.90 meters
School Room
3.00 cu. meters or at least a dimension of 1.00 sq. meters.
Workshops, Factories, and Offices
12.00 cu. meters of air space per person.
Habitable Room
14.00 cu. meters of air space per person
Every room without an artificial ventilation system shall be provided with a window or windows with a total free area opening and equal to at least 10% of the floor area of the room.
Ventilation or vent shafts
horizontal cross-sectional area of not less than 0.10 sq. meter for every meter of height of shaft.
area shall not be less than 1.00 sq. meters and shall have its least dimension less than 600 millimeters.
Airducts
minimum unobstructed cross-sectional area of not less than 0.30 sq. meter with a minimum dimension of 300 millimeters.
openings shall be not less than 300 millimeters above the bottom of the shaft and the street surface or level of court.
Above-Grade Rooms
Rooms for administrative purposes, restaurants, markets, factories, etc.
Not less than 3 changes of air per hour
Rooms Other than Accessory Dwellings and Boiler Rooms