Do I need an engineer to remove a wall during a renovation in NB?

Yes — if the wall is load-bearing, New Brunswick's building code requires a structural engineer's assessment and stamped drawings before any removal work can proceed, and the building permit office will not issue the permit without it. This is not a bureaucratic formality; it's the calculation that determines whether the beam replacing your wall will actually hold the weight above it for the next 50 years.

The engineer's role in a wall removal project is specific and essential. They assess the load path from the roof or upper floor down through the wall being removed, calculate the required beam size (width, depth, species, and grade of lumber or the equivalent in LVL or steel), specify the bearing point requirements at each end of the beam, and confirm that the foundation beneath the new posts can handle the concentrated load. They then produce stamped drawings that your contractor works from and that the building inspector uses to verify the work was done correctly.

In New Brunswick, a structural engineering site visit and stamped drawing package for a residential wall removal typically costs $600 to $1,500, sometimes more for complex situations involving long spans, heavy upper-floor loads, or existing structural conditions that need addressing. Some engineering firms offer preliminary remote consultations for a lower fee before committing to a full assessment. This is worth doing early in your planning process to understand what you're dealing with before you've committed to a contractor or timeline.

For partition walls — walls that carry no structural load — you technically don't need an engineer. But here's the honest challenge: definitively identifying which walls are partition walls in an older NB home requires the same kind of knowledge and access that makes an engineer valuable in the first place. Many experienced renovation contractors can identify obvious partition walls with confidence, and a good contractor's assessment can save you engineering fees on straightforward cases. However, if there is any doubt — any at all — spending $600 on a structural engineer's opinion is far cheaper than discovering mid-demolition that the wall was carrying load.

NB's building permit process enforces this properly. When you apply for a building permit to remove a wall (which is required whenever structural modifications are made to a home), the municipality's building inspector will review the scope of work. For any load-bearing wall, they will require engineered drawings. If you proceed without a permit and without engineering, you're creating a serious liability: your home insurance may deny claims related to the structural modification, and when you sell your home, the lack of permit history for structural work is a material disclosure issue that sophisticated buyers and their home inspectors will catch.

The practical advice is simple: hire a contractor experienced in structural renovations, have them identify whether the wall is load-bearing, get the engineer in before finalizing your budget, and pull the permit. The engineering and permit cost adds $700 to $2,000 to your project but protects a $300,000 to $600,000 asset and ensures the work is done safely. The alternative — saving that money and hoping the wall wasn't structural — has produced some very expensive outcomes in NB homes over the years.

For straightforward partition wall removals in clearly non-structural locations (a closet wall, an interior bathroom partition, a small bedroom divider that clearly runs parallel to the floor joists and has no load above), an experienced contractor's assessment is often sufficient. When in doubt, call the engineer. It's the kind of decision that experienced project managers make reflexively, and it's one of the reasons their renovations don't end up as cautionary tales.

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Looking for experienced contractors? The New Brunswick Construction Network connects homeowners with qualified professionals:

• Thirty Four Renovations
• Gionetterenovations