Notice: This site currently shows the 2012/2017 edition of the Ontario Building Code. The current legally effective code is the 2024 edition (O.Reg. 163/24), in effect since January 1, 2025. Confirm current requirements at ontario.ca.
Navigate

The Ontario Building Code | Required Floors-on-Ground

9.16.1.3. Required floors-on-Ground

(1) All spaces within dwelling units, except crawl spaces, shall be provided with a floor-on-ground, where,

(a) access is provided to the space, and

(b) a floor supported by the structure is not provided.

In Plain Language

A floor-on-ground is required under the conditions set out in this article, distinguishing when a slab floor is mandated versus optional.

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.