The Ontario Building Code | Surface Drainage
9.14.6.1. surface Drainage
(1) Thebuilding shall be located or the building site graded so that water will not accumulate at or near the building and will not adversely affect adjacent properties.
In Plain Language
Surface drainage around a building must be managed as set out in this article, directing rainwater and runoff away from the foundation.
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.