The Ontario Building Code | Groundwater Level Change
4.2.4.9. Groundwater Level Change
(1) Where proposedconstruction will result in a temporary or permanent change in the groundwater level, the effects of this change on adjacent buildings shall be fully investigated and provided for in the design.
In Plain Language
Where proposed construction will cause a temporary or permanent change in the groundwater level, the effects of that change on adjacent buildings and structures must be evaluated and addressed.
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.