If your renovation moves walls, touches mechanical systems, changes the use of the space or adds plumbing, you need a permit — and in practice that covers almost every commercial renovation worth doing. Straightforward interior work clears review in 10 to 20 business days in most GTA municipalities; zoning and change-of-use reviews run 30 to 60+. Total permit costs on a mid-size job usually land between $3,000 and $15,000. Everything below is about keeping your project at the short end of those ranges.
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Get a build-out estimate → or call 647-477-7999In Ontario, the Ontario Building Code (OBC) requires a building permit for most commercial renovation work that goes beyond purely cosmetic changes.
When in doubt, call the building department — the call is free, and guessing wrong isn't.
Your contractor should map this against your scope. Most commercial renovations need at least a building permit; plumbing, HVAC, electrical and signage often carry their own, and a change of use adds zoning review on top.
Commercial applications typically need completed forms, architectural drawings of the proposed changes, mechanical and electrical drawings (engineer-stamped in many cases), fire safety plans where occupancy or layout changes, proof of ownership or the building owner's authorization, and the fees.
Simple commercial interior renovations clear in 10 to 20 business days in most GTA municipalities. Zoning or change-of-use projects run 30 to 60+ business days, and high-rise or heritage-designated buildings add reviews on top. These are the weeks you can't buy back later — which is why the application has to be complete the first time.
The permit gets posted on site for the whole build. Inspections are mandatory at set stages — framing, rough-in, insulation, final — and each has to pass before the work gets covered up.
A final inspection confirms the work meets code. Skip it and the problem doesn't go away — it resurfaces with your insurer, a future buyer, or an occupancy question, always at a worse time.
An inspector who finds unpermitted work can issue a stop-work order, require finished walls opened up for inspection, or require the work redone entirely — with fines on top. Every path through that scenario costs more than the permit would have.
A good contractor manages the whole permit process. Not all do. Settle who owns applications, fees and inspections before you sign the contract — not after the first missed inspection. (At Buildup, permits are part of project management, full stop.)
Permit time is the most common reason commercial renovations run late. If you're working toward a lease start or an opening date, count the permit weeks from day one and start the application while the design is still being finalized. Our commercial renovation timeline guide shows where permitting sits in the overall schedule.
Adding a washroom or moving a few walls feels minor. In a commercial building it can shift fire separations and accessibility compliance — the kind of thing that surfaces at the worst possible moment: an insurance claim, a sale, a fire inspection.
Fees vary by municipality and scope. In the City of Toronto, commercial building permits are calculated on the estimated construction value, with separate fees for trade permits. As a rough guide:
For a mid-size commercial renovation, total permit costs typically run $3,000 to $15,000. Real money — and still a fraction of what unpermitted work costs to unwind.
We've run this process through most GTA building departments; the requirements differ, the failure modes don't. We identify every permit your scope needs, submit complete packages, coordinate the engineers' drawings, book and manage the inspections, and don't hand the project over until the final sign-off is in.
Buildup Contracting builds commercial interiors across Toronto & the GTA — restaurants first, retail and office built with the same discipline. Explore our retail fit-out services and office & commercial tenant improvement services, or book a free site walk — written scope and estimate within one business day.
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Every review from a GTA operator we built for
“BuildUp handled the full build-out of our restaurant and I honestly couldn't have asked for a smoother process. Lev understood from day one how important it was to open on schedule, and he kept everything moving — permits, inspections, the kitchen, the dining area — without me having to chase anyone.”
Kamesh Parcha · via Google
What happens when you get in touch
You deal with Lev directly. He does the site walk and writes the scope — not a salesperson who hands you off.
A written scope and a first read on budget within one business day.
Nothing is booked or billed until you say so. The site walk is free anywhere in the GTA.
WSIB clearance · $5M commercial liability · 1-year workmanship warranty · Mon–Fri 8am–6pm
Free · one business day
Three questions. We come back with a preliminary scope and a first read on budget within one business day — plus a free site walk anywhere in the GTA if it makes sense.
Prefer to talk? Call 647-477-7999. WSIB clearance and $5M commercial liability insured · 1-year workmanship warranty.
Planning a build-out
Buildup Contracting builds offices, retail stores and restaurants across the Greater Toronto Area — permits, trades and inspections on one contract, with a written scope and a first read on budget within one business day of the site walk.
Restaurant constructionRetail fit-outsOffice and commercial TIFranchise and multi-unitLandlords and property managers
Building in a specific city? These pages cover the local approvals, the departments that review them, and what usually moves the schedule there.
More of the research we use to scope real projects:
Commercial kitchen design mistakesChoosing a restaurant contractorOffice fit-out costs in TorontoBubble tea shop build-outsLease-to-opening checklistChoosing a renovation contractorAll guides
Send us the unit address, approximate square footage and your concept. We walk the space for free, then send a written scope and a real price range — no obligation.
