Ontario Building Code Section 9.37: Seasonal Recreational Building Standards and Exclusions
Sarah's Expert Insight
OBC Compliance Specialist
"At empcontracting.ca Inc. your construction contractor in London, Ontario, we find that clients in the Muskoka and Oakville regions often misunderstand the 'seasonal' designation; while Section 9.37 offers cost-saving exemptions on insulation and finishes, any intent to list the property on rental platforms like Airbnb immediately triggers the full requirements of Sections 9.5 to 9.8. Navigating these foundation and fire safety rules early in the design phase is critical to avoiding costly retrofits when converting a summer cottage into a year-round or income-generating asset."
Section 9.37 of the 2024 Ontario Building Code (OBC) outlines the specific requirements and exemptions for buildings intended for seasonal recreational use. Understanding these regulations is vital for property owners and developers working with empcontracting.ca Inc. your construction contractor in London, Ontario, to ensure safety and legal compliance.
9.37.2. General Requirements and Exclusions
For seasonal recreational buildings, the OBC provides significant flexibility compared to year-round residential structures. Under Subsection 9.37.2.1, these buildings are generally exempt from Sections 9.5. to 9.7. and 9.9. to 9.11., provided they are not used for rental or tourist accommodation.
Insulation, Flooring, and Mechanical Systems
While flooring must support live and dead loads, it does not need to comply with the rigid standards of Section 9.30 if it is tight-fitting. Additionally, thermal insulation, vapour barriers, and mechanical ventilation are not mandatory for seasonal dwellings. However, if a builder chooses to install these systems, they must meet the standard Part 9 requirements.
9.37.2.2. Foundation and Structural Masonry
Continuous perimeter foundation walls are not mandatory for seasonal structures. When using unit masonry columns (piers), specific height-to-width ratios must be maintained:
- Hollow Masonry: Height must not exceed 4 times the least dimension.
- Solid Masonry: Height must not exceed 10 times the least dimension.
- Reinforced Columns: Height must not exceed 18 times the least dimension when reinforced with four 13 mm bars and filled with concrete.
9.37.2.4. Mandatory Smoke Alarms
Despite the various exemptions for seasonal buildings, fire safety remains a priority. Every dwelling unit governed by this section must be equipped with smoke alarms that comply with Subsection 9.10.19. there are no exceptions for seasonal use regarding life safety devices.
9.37.3. Requirements for Seasonal Tourist Accommodations
Compliance for Rental and Commercial Use
It is important to note that if a seasonal building is intended for rent or tourist accommodation, the exemptions for room dimensions, stairs, and egress (Sections 9.5. to 9.8.) no longer apply. These structures must meet a higher standard of compliance to ensure occupant safety.
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.