How the Ontario Building Permit Process Works

Understanding the building permit process in Ontario helps you plan your project timeline, budget accurately, and avoid costly delays. Here's a complete step-by-step guide from initial planning to final inspection, based on our experience preparing hundreds of permit applications across Ontario municipalities.

Step 1: Determine If You Need a Permit

In Ontario, a building permit is required for most construction, demolition, and renovation work. Common projects requiring permits include new construction, additions, basement conversions, structural changes, and deck construction over 600mm above grade. Read our guide: Do I Need a Permit for My Renovation?

Step 2: Hire a BCIN-Certified Designer

Ontario requires that building permit drawings be prepared by a BCIN-certified designer, architect, or professional engineer. Learn more about what BCIN certification means and why it matters for your project.

Step 3: Prepare Permit Drawings

Your drawing package typically includes site plan, floor plans, elevations, cross-sections, structural details, and energy compliance documentation. The specific requirements depend on your project type. Ontario Design Studio delivers drawings in 5–10 business days.

Step 4: Submit to Your Municipality

Submit your permit application along with drawings, completed forms (including Schedule 1), and applicable fees to your local building department. See typical permit fees by municipality.

Step 5: Plans Review

A plans examiner reviews your submission for OBC compliance. Typical timelines: 10–20 business days for residential, 20–40+ for commercial.

Step 6: Permit Issuance

Once approved, your building permit is issued. Post the permit on your job site before starting construction. If your application receives a deficiency notice, we can help resolve it.

Step 7: Construction & Inspections

During construction, you'll need to book inspections at key stages — footings, framing, insulation, and final. Pass all inspections to receive your occupancy permit.

Frequently Asked Questions

How long does the building permit process take in Ontario?

The total process depends on two phases: drawing preparation (5–10 business days with Ontario Design Studio) and municipal review (10–20 business days for residential, 20–40+ for commercial). Simple residential projects can be approved in as little as 3–4 weeks total, while complex commercial projects may take 2–3 months.

What happens during a building permit inspection?

During construction, your municipality's building inspector visits your site at key milestones: footings/foundation, framing, insulation/vapour barrier, and final inspection. You must call to book each inspection before covering the previous stage. Pass all inspections to receive your occupancy permit.