Do I Need a Permit for Commercial Renovation in Ontario?

Yes, most commercial renovations in Ontario require a building permit. The Ontario Building Code (OBC) requires a permit for any construction that involves structural changes, changes to mechanical or electrical systems, fire separations, plumbing, or a change of use. In practice, this covers nearly every commercial renovation beyond cosmetic work.

What Requires a Permit

Under the OBC and municipal bylaws across Ontario, you need a building permit for:

• Adding or removing walls (even non-load-bearing partitions in many municipalities)
• Any electrical work beyond replacing fixtures on existing circuits
• Any plumbing work (new sinks, relocating fixtures, adding washrooms)
• HVAC modifications (new ductwork, relocating diffusers, adding units)
• Installing or modifying fire alarm systems
• Installing or modifying sprinkler systems
• Change of occupancy classification (for example, converting an office to a restaurant or medical clinic)
• Adding a kitchen exhaust hood system
• Accessibility modifications that involve structural or mechanical work

What Does Not Require a Permit

These types of work generally do not require a building permit in Ontario:

• Painting
• Replacing flooring without changing floor levels
• Installing furniture and workstations
• Replacing ceiling tiles in an existing grid
• Cosmetic updates to reception areas (new finishes on existing walls)
• Replacing light fixtures on existing circuits (no new wiring)

Even for exempt work, check with your municipality. Some cities, including Toronto, have stricter requirements than the provincial minimum.

What Happens If You Renovate Without a Permit

Skipping the permit is risky and can be expensive:

1. Stop-work orders. A building inspector can shut down your project if they discover unpermitted work. This delays your timeline by weeks or months.
2. Fines. Ontario municipalities can levy fines for unpermitted construction. In Toronto, fines can exceed $25,000.
3. Forced removal. You may be ordered to remove completed work and restore the space to its previous condition, at your cost.
4. Insurance issues. If a fire or structural failure occurs in an unpermitted space, your insurance carrier may deny the claim.
5. Lease complications. Most commercial leases require the tenant to obtain permits for any construction. Unpermitted work is a lease violation.
6. Resale and re-leasing problems. Future tenants, buyers, or landlords will discover the unpermitted work during due diligence.

How the Permit Process Works

Step 1: Drawings

You need construction drawings prepared by a licensed architect or designer. For a typical commercial renovation, the drawing set includes architectural plans, reflected ceiling plans, electrical plans, mechanical plans, and plumbing plans. Complex projects may also require structural and fire protection drawings.

Step 2: Submission

The drawings are submitted to the municipal building department along with an application form and fees. VNG handles this submission for all projects we build.

Step 3: Plan Review

A plan examiner reviews the submission for OBC compliance. This review takes 6-10 weeks in Toronto, 5-8 weeks in most 905 municipalities. If deficiencies are found, you receive a deficiency letter and must respond with revised drawings.

Step 4: Permit Issued

Once approved, the permit is issued and posted at the job site. Construction can begin.

Step 5: Inspections

During construction, the building department conducts inspections at key milestones: framing, mechanical rough-in, electrical rough-in, insulation, and final. Each inspection must pass before proceeding.

Step 6: Occupancy

After the final inspection passes, you receive an occupancy certificate confirming the space is safe and code-compliant.

Permit Fees in Ontario (2026)

Permit fees vary by municipality and are typically calculated as a percentage of construction value:

• Toronto: approximately $10-15 per $1,000 of construction value, plus plan review surcharges
• Mississauga: approximately $12-16 per $1,000 of construction value
• Brampton, Vaughan, Markham: similar range, $10-15 per $1,000

For a $200,000 office renovation in Toronto, expect permit fees of approximately $3,000-4,500.

VNG manages the full permit process for every project from drawing coordination through submission, deficiency responses, inspection scheduling, and occupancy certificate. Request a quote to discuss your project.