When Do You Need an Engineer for Your Sign Project in Ontario?

In Ontario, all signage is governed by the Ontario Building Code 2024, not just municipal sign by-laws. An Engineer is legally required on a sign project in four specific cases: when the sign weighs more than 115 kg, is attached to a parapet wall, is a roof sign with any face over 10 m², or is a ground sign over 7.5 m in height (review only). Engineers must be licensed Professional Engineers under the Professional Engineers Act, carry liability insurance, and be registered with PEO. Engineering involvement includes structural design review, stamping of drawings, and—where required—General Review, which involves on-site inspection during installation. Early coordination with an engineer reduces permit risk, delays, and liability.