What inspections are required during a bathroom renovation under the Ontario Building Code?

A permitted bathroom renovation in Toronto typically requires two to four inspections at specific stages of construction, and work cannot proceed past each stage until the inspector signs off. The exact inspections depend on your scope of work, but the most common are plumbing rough-in, electrical rough-in, and final inspections.

Plumbing Rough-In Inspection

If your bathroom renovation involves any new or modified drain, waste, or vent piping, or new water supply lines, the plumbing rough-in must be inspected before walls and floors are closed up. The City of Toronto plumbing inspector will verify that drain pipes are properly sized and sloped (minimum 1/4 inch per foot for horizontal runs), vent connections comply with Ontario Building Code requirements, supply lines are properly supported and insulated where necessary, and all connections are watertight. Your licensed plumber should schedule this inspection and be present when the inspector arrives. This is a critical inspection — covering up plumbing before it passes rough-in inspection can result in the city requiring you to open walls at your expense.

Electrical Rough-In Inspection (ESA)

All new or modified electrical work in Ontario bathrooms must be inspected by the Electrical Safety Authority (ESA) before being concealed behind drywall or tile. The ESA inspector verifies that GFCI protection is provided for all bathroom receptacles, circuits are properly sized (dedicated 20-amp circuits for bathroom receptacles is standard), wiring is properly routed and supported, heated floor circuits are correctly installed with proper ground fault protection, and exhaust fan wiring meets code. Your licensed electrician arranges the ESA inspection as part of their scope. The inspection must happen after rough-in wiring is complete but before drywall, cement board, or backer board covers the work.

Framing Inspection

If your renovation involves structural modifications — removing a wall, enlarging a doorway, reinforcing floor joists for a heavy freestanding tub, or modifying the floor structure for a curbless shower — a framing inspection is required before the work is enclosed. The inspector verifies that structural modifications match the approved plans, proper headers and supports are in place, and fire-stopping is installed where required (especially important in semi-detached and row houses across Toronto where fire separations between units must be maintained).

Final Inspection

Once all work is complete — fixtures installed, tile finished, everything functional — a final inspection confirms that the completed bathroom meets Ontario Building Code requirements. The inspector checks fixture clearances (minimum 15 inches from toilet centreline to side wall, 21 inches clear space in front of toilet), hot water temperature limiting (maximum 49 degrees Celsius at the fixture, requiring thermostatic or pressure-balance shower valves), exhaust fan operation and exterior venting, and overall compliance with the approved plans.

Practical Tips for GTA Homeowners

Inspection scheduling in Toronto typically requires 48 hours' notice, though busy periods may require more lead time. Your contractor should coordinate inspections into the project schedule so there is minimal downtime — experienced GTA bathroom contractors know the inspection sequence and plan their work accordingly. Each failed inspection means corrective work and re-inspection, which adds time and potentially cost to your project.

Keep your permit documents and all inspection reports in a safe place. When you eventually sell your Toronto home, proof of permitted and inspected work adds value and avoids complications during the buyer's due diligence process. A clean permit history is especially important in the competitive GTA real estate market.