Ontario Building Code

Prior to December 31, 1975, the province of Ontario did not have a Building Code and each Ontario municipality had the authority to enforce its own building rules. 

The first Ontario Building Code came into force on December 31, 1975, which introduced the first Ontario Building Code (OBC). It superseded all municipal laws regarding design and construction of buildings and set out technical requirements for the construction and demolition of buildings.

The primary purpose of the OBC is to promote public safety by applying appropriate uniform building standards by creating uniform building regulations throughout the Province. 

The Ontario Building Code Act provides the authority for the regulations which are noted in the Ontario Building Code for  construction of buildings in Ontario. See below.

Ontario Building Code Act

Ontario Building Code (OBC) 2024

Ontario Building Code (OBC) 2012

The following link outlines the Building Code regulation changes from 2022. 

NEW 2022 O.B.C. REQUIREMENTS FOR STAIRS, HANDRAILS AND GUARDS

ONTARIO BUILDING CODE CHANGES- RADON

Ontario Building Code General Information Bulletins:

• Tiny Homes (Division C 1.11.)
• Site Assembled & Factory-Built Homes (Division B 9.1.1.9)
• Secondary Suites - In Buildings Older Than 5 Years

A Highlight of the 2024 Ontario Building Code Changes:

• Heating and Ventilation - Part 6 & 9.32
• Part 7 Plumbing
• Part 9