The Ontario Building Code | Areas of Master Bedrooms
9.5.7.2. Areas of Master Bedrooms
(1) Except as provided in Article 9.5.7.3., at least one bedroom in every dwelling unit shall have an area of not less than 9.8 m² where built-in cabinets are not provided and not less than 8.8 m² where built-in cabinets are provided.
In Plain Language
Master bedrooms have their own minimum area requirement set out in this article, typically larger than the general bedroom minimum.
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.