Stairways Lighting

(1)  Every stairway shall be lighted.

(2)  Except as provided in Sentence (3), 3-way wall switches located at the head and foot of every stairway shall be provided to control at least one lighting outlet with fixture for stairways with four or more risers in a house or an individual dwelling unit.

(3)  The stairway lighting for basements that do not contain finished space or lead to an outside entrance or built-in garage and that serve not more than one dwelling unit is permitted to be controlled by a single switch located at the head of the stairs.

Article 9.34.2.3 Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.