What inspections are required during a home addition build in Ottawa?

A home addition in Ottawa is inspected by the City at set points during construction, and those inspections are tied to your building permit. The exact list of required inspections comes with your permit, so read it carefully and make sure your contractor knows which stages must be booked before work moves on. Covering up work before it has been inspected can mean opening walls back up so the inspector can see it.

The stages typically follow the order the building goes up. Early on, the inspector looks at the excavation and footings before concrete is placed, checking depth and size against the approved drawings. Under the Building Code, footings on clay or soils that are not clearly defined must be at least 1.2 m deep and not less than the depth of frost penetration, and on sensitive clay, including Leda clay, footing sizes must be engineered. If your engineer or a geotechnical report specified anything special, it should be visible at this point.

Later inspections usually cover the foundation and drainage before backfill, the structural framing once it is complete, and the insulation and air/vapour barrier before drywall goes up. Additions also have to meet energy requirements; one verified example is that an addition can use the Code's addition table, which calls for R-60 in an attic ceiling and R-19 plus R-5 continuous insulation in above-grade walls, though your designer may use a compliance package instead. Plumbing work is inspected as part of the building permit, since plumbing alterations and extensions require one.

Some inspections come from outside the City. Electrical work needs an ESA notification or permit, and ESA inspects the wiring, typically before walls are closed and again when the installation is finished. Gas work is done by a TSSA-certified gas technician. Ask ESA and your gas technician about current fees rather than relying on old figures.

The final building inspection confirms the finished addition matches the approved plans and that earlier deficiencies have been fixed. How long the whole sequence takes depends on the project and on scheduling, so ask the City for current inspection booking times and build that into your schedule.

Remember that both the owner and the contractor are responsible for making sure the permit is obtained and followed. When you interview contractors, ask how they book inspections and handle deficiencies. You can browse addition contractors in the Ottawa Construction Network directory and compare itemized quotes.

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

• Homeupgraders
• RenoMotion Inc.
• Humble Homes - property maintenance
• Regimbal
• Dreamwood Construction & Renovations