2024 Ontario Building Code

Effective January 1, 2025, Ontario is adopting the 2024 Ontario Building Code to replace the 2012 Ontario Building Code.

Applicants may submit permit applications under the 2012 Ontario Building Code until March 31, 2025. These applications must have a substantial portion of the design and specifications completed prior to December 31, 2024. Construction for projects under the 2012 Ontario Building Code must commence within 6 months of permit issuance.

Overview: 2024 Ontario Building Code 

• Doing it Right Guide - 2024 Part 9 Ontario Building Code Changes

The Details: 2024 Ontario Building Code

Click on a document title below to download and review the new 2024 Building Code requirements. All documents are in PDF format.

• 2024 Building Code Key Changes Technical Bulletin
• 2024 OBC Div A
• 2024 OBC Div B Part 1 - General
• 2024 OBC Div B Part 2 - Farm Buildings
• 2024 OBC Div B Part 3 – Fire Protection, Occupant Safety, and Accessibility
• 2024 OBC Div B Part 4 – Structural Design
• 2024 OBC Div B Part 5 – Environmental Separation
• 2024 OBC Div B Part 6 - HVAC
• 2024 OBC Div B Part 7 - Plumbing
• 2024 OBC Div B Part 8 Sewage Systems
• 2024 OBC Div B Part 9 Housing and small buildings
• 2024 OBC Div B Part 10, 11, and 12
• 2024 OBC Div C
• 2024 OBC Modular Housing and Tiny Homes