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OBC DIVISION B · PART 3 · SECTION 3.15 — SIGNS

When does a sign need a building permit under the Ontario Building Code?

Larger signs are designated structures under the Building Code Act, notably ground signs and signs on buildings above a threshold height, commonly cited as more than 7.5 m above grade, and require a building permit and compliance with Section 3.15. Municipal sign bylaws apply separately.

Code reference
Signs above prescribed size or height thresholds are designated structures to which the Building Code Act and the Code apply, requiring a permit before erection. Section 3.15 sets out the construction requirements for regulated signs, addressing their structural adequacy, materials, supports and anchorage, and their relationship to the buildings and spaces around them.
OBC Division B, Section 3.15 (Signs); Division A designated structure provisions

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

What this means in practice

Two approval streams run in parallel and confuse applicants: the municipal sign bylaw governs what a sign may say, its size and its zoning appropriateness, while the OBC permit governs whether the structure will stay up. A bylaw variance does not waive the building permit, and vice versa. Tall pylon signs, large fascia signs and rooftop installations typically need engineered drawings for the permit. A common pitfall is a sign company installing first and permitting never; orders to remove unpermitted large signs are routine enforcement actions.

Plain language

Small shop signs usually only need approval under your city's sign bylaw. Big signs, tall pylon signs or large signs mounted high on buildings, also need a building permit, because they are real structures that must be engineered not to fall.

Related questions

What are the structural requirements for signs under the Ontario Building Code?What rules apply to projecting signs over sidewalks in Ontario?What are the requirements for roof signs on buildings 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.