Commercial Renovation Permit Guide for Ontario

Permits are one of the most misunderstood parts of a commercial renovation in Ontario. Tenants and building owners routinely underestimate what requires a permit, how long approvals take, and what the consequences are for skipping the process. This guide covers what you actually need to know before you start.

What Requires a Building Permit in Ontario

Under the Ontario Building Code (OBC), a building permit is required for any construction or renovation that involves:

• Structural changes, removing or adding walls, columns, or load-bearing elements
• Plumbing, any new or relocated drains, supply lines, or fixtures
• HVAC, new ductwork, unit additions, or significant modifications to existing systems
• Electrical, new panels, major circuit additions (these require an ESA electrical permit separately)
• Egress changes, any modification to exits, corridors, or means of escape
• Change of use, converting a space from one occupancy classification to another (e.g., office to restaurant)
• Accessibility, any changes affecting barrier-free access routes

Purely cosmetic work, paint, carpet replacement, relamping, replacing like-for-like fixtures, generally does not require a permit. When in doubt, a quick call to the building department will confirm.

When You Also Need an Electrical Safety Authority (ESA) Permit

The building permit and the ESA permit are separate. Electrical work in Ontario requires an ESA permit regardless of whether a building permit is also required. Your electrician applies for this directly. Make sure your contractor explicitly confirms who is pulling the ESA permit before work starts.

The Application Process in Major GTA Municipalities

Toronto: Applications go through the City of Toronto's permit portal. Complex commercial projects often require a pre-application consultation. Expect 4-10 weeks for a complete application to be approved, depending on complexity and current backlog.

Mississauga: The City of Mississauga uses an online portal. Standard commercial TIs are typically reviewed within 3-6 weeks for a complete submission. Incomplete applications restart the clock.

Brampton, Vaughan, Markham, Hamilton: Similar online portals. Review timelines vary by season and current backlog, budget 3-8 weeks for standard commercial applications.

A complete application includes architectural drawings stamped by a registered designer or architect, a project description, site plan, and any required engineering letters. Incomplete submissions are the single largest cause of permit delays.

Who Pulls the Permit: Contractor or Tenant?

Either can act as the permit holder, but the permit holder is legally responsible for ensuring the work complies with the approved plans and all inspections are completed. In practice, most experienced commercial contractors pull the permit themselves. This is preferable, they know what the drawings need to show, they manage the inspector relationship, and they're accountable for the outcome.

If your contractor suggests you pull the permit yourself, ask why. Occasionally there is a legitimate reason, but more often it is a sign the contractor is not experienced with the permit process.

Required Inspections

Most commercial renovation permits require at minimum:

• Framing rough-in inspection, before drywall is closed
• Mechanical/plumbing rough-in inspection, before walls close
• Electrical rough-in, ESA inspector, before walls close
• Final occupancy inspection, after all work is complete

Missing an inspection and closing the walls anyway can result in an order to open the walls back up. Scheduling inspections is the permit holder's responsibility and must be built into the project schedule, not treated as an afterthought.

What Happens If You Renovate Without a Permit

Unpermitted commercial work creates real problems:

• Forced remediation, the municipality can order you to open walls or undo work to verify code compliance
• No occupancy, you may not be able to legally occupy or operate from the space
• Insurance issues, a claim arising from unpermitted work may be denied
• Lease complications, many commercial leases require that tenant improvements be permitted; unpermitted work can constitute a lease breach
• Resale or re-leasing problems, a future tenant or buyer will identify unpermitted work during due diligence

The short-term time savings of skipping a permit almost never justify these risks.

How VNG Handles Permits

VNG manages the full permit process on every project that requires one. We coordinate the drawings, submit the application, respond to plan review comments, schedule all required inspections, and close the permit at the end of the project. Permit management is not an add-on, it is part of the standard scope.

If your current contractor's quote does not include permit management, ask them explicitly who is responsible for each step. The answer will tell you a lot about how the project will be managed.