The Ontario Building Code | New Building Systems and Extension of Existing Building Systems
11.3.1.2. New building Systems and Extension of Existing Building Systems
(1) Except as provided in Article 11.3.3.1. and Section 11.5., the design and construction of a new building system or the extension of an existing building system, shall comply with all other Parts.
11.3.2. Extension of Buildings
In Plain Language
New building systems and extensions of existing ones must meet the requirements set out in this article, distinguishing added systems from repairs to existing ones.
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.