Do you need a Structural Engineer's Report?

A Structural Engineer's Report is a document, prepared and sealed by a licensed Professional Engineer (P.Eng.), that describes the condition of a building's structure and gives a professional opinion on it. Because it carries an engineer's seal, it's something a building department, a lender, an insurer, or a buyer's lawyer will accept as authoritative — which is exactly why people ask for one.

In Ontario, these reports are governed by the same professional standards as any engineering work: they're issued under a firm's Certificate of Authorization from Professional Engineers Ontario and prepared with reference to the Ontario Building Code. That's the short version. Here's when one actually comes up.

When you might need a Structural Engineer's Report

Most residential reports we're asked for fall into one of these situations:

• Buying or selling a home. A buyer (or their lawyer or lender) wants an engineer's opinion on a foundation crack, a sagging floor, a previous renovation, or a home inspector's "recommend further evaluation by a structural engineer" note.
• Visible signs of distress. Stair-step cracking in block or brick, bowing foundation walls, doors that won't latch, sloping floors, or a beam that's clearly deflecting. A report tells you whether it's cosmetic or a real problem — and what to do about it.
• Removing or altering structure. Taking out a load-bearing wall, cutting a new opening, or adding load. Your building department will usually want a sealed drawing or report before issuing the permit.
• Legalizing existing work. A deck, a basement apartment, or an addition that was built without a permit and now needs to be documented and assessed.
• Insurance or financing. An insurer or a lender requires confirmation that the structure is sound before they'll write the policy or close the deal.
• After an event. Fire, water, a vehicle impact, or a heavy snow load — anything that may have affected the structure.

A good report doesn't just say "there's a crack" — it tells you whether it matters, why, and what to do next.

What's actually involved

For a typical residential report, the process is straightforward:

1. Site inspection. An engineer visits and examines the relevant structure — the foundation, framing, beams, and whatever prompted the call. We document what we see, with measurements and photos.
2. Assessment. We evaluate the structure against the Ontario Building Code and sound engineering judgement: is it adequate, is there a deficiency, and what's causing it?
3. The sealed report. You receive a written, sealed report stating our findings and recommendations — repairs if needed, or confirmation that the structure is sound. It's yours to submit to your building department, lender, insurer, or lawyer.

How long does it take, and what does it cost?

Most straightforward residential reports are turned around within one to two weeks of the site visit. Cost depends on the size of the home and what triggered the report, but it falls in a predictable range — and we quote a fixed fee in writing before we start, so there are no surprises.

What a report is not

A Structural Engineer's Report is not a general home inspection. A home inspector looks broadly at the whole house — roof, electrical, plumbing, and so on — and flags concerns. A structural engineer goes deep on the structure specifically and provides a sealed professional opinion that carries legal and regulatory weight. The two are complementary: home inspectors often recommend a structural engineer when they spot something outside their scope.

This article is general information, not engineering advice for a specific building. Every structure is different — for an opinion on yours, please get in touch.

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