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OBC DIVISION B · PART 9 · SECTION 9.39 — PARK MODEL TRAILERS

When does the Ontario Building Code apply to park model trailers?

Park model trailers are accepted where they conform to the CSA Z241 series of standards; the OBC then governs site-related matters like foundations, anchorage and service connections. Units built to Z241, unlike RVs, are treated as code-recognized recreational buildings.

Code reference
The Code recognizes park model trailers constructed in conformance with the CSA Z241 standard series, treating factory certification as satisfying the requirements for the unit itself. On-site requirements, including support, anchorage against wind, and connection of water, sewage and other services, fall under Code and municipal control, and placement generally still involves permits and zoning approval.
OBC Division B, Section 9.39.

Paraphrased for clarity — open this provision in the BUILDAiD Library for the exact wording.

What this means in practice

The division of responsibility is the key concept: the factory and its CSA certification cover the box, while the municipality regulates everything about how and where it lands, including permits, setbacks, seasonal-use zoning and service hookups. Buyers should verify the Z241 compliance label, since an uncertified unit cannot ride on this section and may be unapprovable. Also understand the use limits: park models are recreational units, and using one as a permanent year-round dwelling typically conflicts with both the standard's intent and local zoning, a frequent point of enforcement in trailer parks and rural lots.

Plain language

A park model trailer built and labelled to the CSA Z241 standard is code-acceptable as a factory unit; the local building department then oversees how it is supported, tied down and hooked up. You still usually need a permit to place one.

Related questions

What foundation and anchorage requirements apply to park model trailers in Ontario?

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This page is provided for general information. Building code requirements depend on your specific project, occupancy and municipality, and code editions change. Always verify requirements against the current Ontario Building Code and confirm with your local building department.