The Ontario Building Code | Room and Space Height
3.7.1.1. Room and Space Height
(1) The height of every room and space shall be sufficient so that the ceiling or ceiling fixtures do not obstruct movement or activities below.
(2) The unobstructed height in dwelling unitsand sleeping rooms in Group C occupancies shall conform to Subsection 9.5.3.
In Plain Language
Every room and space must be tall enough that the ceiling or ceiling fixtures don't interfere with movement or activities below, with dwelling units and Group C sleeping rooms following the specific height rules in Part 9.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.