The Ontario Building Code | Building Areas
3.9.3.1. building Areas
(1) A single portable classroom shall be not more than 100 m2in building area, and not more than 1 storey in building height.
(2) For the purposes of Subsection 3.2.2., where the horizontal distance between portable classrooms is less than 6 m, a group of portable classrooms may be considered as a single building with a building area equal to the aggregate area of the portable classrooms.
In Plain Language
A single portable classroom is capped at 100 square metres in building area and 1 storey in height, and where portable classrooms sit less than 6 m apart, a group of them can be treated as one combined building for area purposes.
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.