“Small buildings (sheds, garages) are exempt.” Fact: Detached garages under 10 sq.m. (108 sq.ft.) are exempt, but any garage with heating or a door connected to the house triggers CO alarm requirements.
The Supplementary Standard SB-12 has been overhauled. For residential homes (Part 9 buildings), prescriptive thermal resistance (R-value) requirements have increased: ontario building code 2024
: A three-month transition period was provided until March 31, 2025 . This allowed permit applications for projects already substantially designed under the previous 2012 Code to proceed. “Small buildings (sheds, garages) are exempt
The new code structure is unique: the regulation itself is a concise one-page document that adopts the by reference, supplemented by a specific Ontario Amendment Document for provincial-only variations (such as accessibility and sewage systems). 3. Key Technical Changes by Category Housing and Secondary Suites (Part 9) The 2024 Ontario Building Code | ontario.ca For residential homes (Part 9 buildings)
Ontario Amendments to the National Building Code of Canada 2020 Ontario Rural Wastewater Centre Official Code Documents The primary "paper" or reference for the code is the 2024 Building Code Compendium , which is available in both digital and print formats: ontario.ca 2024 Ontario Building Code Compendium (Vol 1)