Ontario Building Code Online

| Amendment | Description | |-----------|-------------| | | New Supplementary Standard SB-12 (energy efficiency for houses & small buildings) – tightened thermal bridging, mandatory hot water pipe insulation, increased blower door testing. | | Jan 2022 | Changes to Part 3 – new provisions for mass timber construction (up to 12 storeys), updated elevator requirements. | | 2024–2025 (expected) | Adoption of NBC 2020 with Ontario amendments – focus on climate resilience (floodproofing, cooling in residential buildings), updated snow/rain maps, stricter accessibility. |

We are currently seeing a quiet arms race between developers trying to save floor space and code consultants using fire modeling software to prove that a two-stair building is safe without meeting the strict prescriptive measurements. It’s a fascinating intersection of software simulation and 19th-century fire safety philosophy. ontario building code

[Current Date] Subject: Regulatory Framework for Construction in Ontario Authority: Building Code Act, 1992 (S.O. 1992, c. 23) | Amendment | Description | |-----------|-------------| | |

In the past, two stairs were almost always enough. Today, with buildings growing taller and denser, the OBC is increasingly demanding a or enhanced evacuation strategies (like elevators used for evacuation) for taller buildings. | We are currently seeing a quiet arms