The Ontario Building Code | Construction on Fill
4.2.4.13. Construction on Fill
(1) buildings may be placed on fillif it can be shown by subsurface investigationthat,
(a) the fillis or can be made capable of safely supporting the building,
(b) detrimental movement of the building or services leading to the buildingwill not occur, and
(c) explosive gases can be controlled or do not exist.
In Plain Language
Buildings may be placed on fill provided a subsurface investigation shows the fill can safely support the building and that detrimental settlement or other adverse effects won't occur.
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.