What inspections are required during a basement renovation in New Brunswick and at what stages do inspectors need to visit?

A permitted basement renovation in New Brunswick requires four key inspection stages: framing, insulation, rough-in (electrical and plumbing), and final. Each inspection must be completed and passed before work proceeds to the next phase, and no walls or ceilings can be closed up until the inspector has signed off on what is behind them.

The framing inspection is the first visit after you have built your stud walls, bulkheads, and any partition framing. The inspector verifies that wall framing is properly secured, that there is an adequate air gap between the framing and the foundation wall (critical in NB where moisture wicks through concrete and block foundations), and that any structural modifications — such as lally column relocations or header installations — match the approved plans. If you are adding a basement bedroom, the inspector will confirm that your egress window rough opening meets code: a minimum 3.8 square feet of clear opening with a sill height no more than 1,500 mm from the finished floor. This is a life-safety requirement with no exceptions.

Next comes the insulation inspection, which is particularly important in New Brunswick's Maritime climate. The inspector checks that insulation meets the minimum R-12.5 requirement for basement walls (R-20 is recommended for NB's cold winters), that the vapour barrier is correctly placed on the warm side of the insulation assembly, and that there are no gaps or compression points that would create cold spots and condensation. If you are using closed-cell spray foam ($4.00-$7.00 per square foot installed), it acts as both insulation and vapour barrier, which inspectors in NB are familiar with. If you are using rigid foam board with a stud wall in front, the inspector verifies proper sealing at joints and transitions. Fiberglass batt insulation directly against a foundation wall will typically be flagged — it traps moisture against the cold concrete and leads to hidden mold, which is a well-known problem in NB basements.

The rough-in inspections cover electrical and plumbing work before anything gets covered by drywall. The electrical inspector verifies that all basement outlets have GFCI protection, that bedroom circuits have AFCI protection, that outlet spacing meets code, and that your panel has sufficient capacity for the new circuits. Many older NB homes have 60-amp service, which often requires an upgrade to 100 or 200 amps ($1,500-$4,000) to support a finished basement. The plumbing inspector checks drain connections, venting, supply lines, and backwater valve installation if you are adding a basement bathroom.

The final inspection happens once all finishing work — drywall, flooring, trim, fixtures, and paint — is complete. The inspector confirms that smoke detectors and carbon monoxide detectors are installed in the correct locations, that all electrical outlets and fixtures are properly covered, that the space meets minimum ceiling height requirements (6 feet 5 inches for habitable space), and that the finished product matches the approved permit drawings.

In Moncton, Saint John, and Fredericton, the city building departments handle inspections directly and can typically schedule visits within a few days of your request. In rural areas governed by Regional Service Commissions, scheduling can take longer — plan for up to a week between requesting and receiving an inspection. Your contractor should coordinate inspection timing to avoid costly delays between trades.

One critical NB-specific note: never close up walls before the rough-in inspection. If an inspector finds closed walls, they can require you to tear out the drywall at your expense. Budget an extra few days at each stage for inspection scheduling, and your project will stay on track.

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

• Gionetterenovations
• Thirty Four Renovations