2024 OBC Standards: Minimum Door Sizes and Glass Requirements for Ontario Construction
Sarah's Expert Insight
OBC Compliance Specialist
"In high-demand markets like London and Oakville, correctly implementing Section 9.5.5.1 is the difference between a successful secondary suite conversion and a failed inspection. As senior consultants at empcontracting.ca Inc., we prioritize these framing dimensions early in the design phase to ensure that barrier-free requirements and egress widths are never compromised by structural oversights."
When planning a renovation or new build, compliance with the 2024 Ontario Building Code (OBC) is mandatory for safety and legal occupancy. At empcontracting.ca Inc. your construction contractor in London, Ontario, we ensure every entry point and glazed surface meets these rigorous provincial standards.
9.5.5.1. Minimum Residential Door Dimensions
The OBC Table 9.5.5.1 dictates the minimum width and height for doors depending on their location and function within a dwelling or secondary suite.
Primary Access and Utility Areas
- Main Entrance & Vestibules: Minimum 810 mm width and 1,980 mm height.
- Secondary Suite Entrances: Must maintain 810 mm x 1,980 mm for required entrances.
- Basement Passage & Utility Rooms: Required minimum of 810 mm width and 1,980 mm height.
Interior Living Spaces
- Standard Bedrooms & Balconies: Minimum 760 mm width and 1,980 mm height.
- Bathrooms and Walk-in Closets: Minimum 610 mm width and 1,980 mm height.
- Rooms off Narrow Hallways (710 mm): Minimum 610 mm width and 1,980 mm height.
Specialized Door and Accessibility Standards
9.5.5.2 Public Water-Closet Rooms
For commercial or public-facing projects, doors to water-closet rooms must be significantly larger, requiring a minimum of 810 mm width and 2,030 mm height to ensure public accessibility.
9.5.5.3 Barrier-Free Bathroom Requirements
In suites where barrier-free paths are required, door widths are adjusted based on hallway size. If a corridor is less than 1,060 mm wide, the bathroom door must provide a clear opening of at least 810 mm to accommodate mobility devices.
9.6.1. Glass Application and Safety
Section 9.6 regulates the use of glass in both interior and exterior applications. This includes glass in shower enclosures, site-built windows, and glazed partitions. Adhering to these standards is essential for preventing injury and ensuring structural durability in varied climates, from the humid summers of London to the winter conditions in Muskoka.
Disclaimer: This content is generated from the Ontario Building Code for educational purposes. Always consult with a licensed professional engineer or your local building department before starting any construction project in London, Ontario.