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.
The Process at a Glance
We confirm your scope against the Ontario Building Code and your municipal zoning by-law - free.
Ontario law requires a qualified, registered designer for most permit drawings.
Site plan, floor plans, elevations, sections, structural details, and energy compliance - typically in 5–10 business days.
We package and file the application through the city’s portal, with every required form and schedule.
The examiner reviews for code compliance; we respond to any comments so a complete submission clears quickly.
Once approved, the municipality issues your building permit and you can begin construction.
Book city inspections at each required milestone through to final sign-off.
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.
Ready to start your project?
Ontario Design Studio delivers BCIN-certified, OBC-compliant building permit drawings across Ontario and the GTA. Call 416-558-9607 or request your free quote.
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.