"My contractor said I don't need a permit."
That sentence has cost Toronto homeowners thousands of dollars, killed real estate deals, and turned insurance claims into denials. Let's talk about what actually happens when you build without a permit in Toronto — because the consequences are worse than most people think.
The 50% Surcharge
Let's start with the one that hits your wallet first.
If the City of Toronto discovers you've done work without a permit, they charge a "construction without permit" surcharge equal to 50% of the regular permit fee. The minimum surcharge is $214.79, and the maximum is $29,456.99 per permit.
So that deck permit that would have cost $214.79? Now it's $322+. That basement renovation permit that would have been $577? Now it's $866+. And you still have to get the permit — the surcharge is on top of the regular fees.
Source: Toronto Building Permit Fees (toronto.ca)
The Provincial Fine: Up to $50,000
The surcharge is just the City's fee. Under the Ontario Building Code Act (Section 36), building without a permit is an offence that carries real fines:
- First offence (individual): Up to $50,000
- Subsequent offences (individual): Up to $100,000
- Corporation first offence: Up to $500,000
These are maximums — courts don't always impose the full amount. But the exposure is real, and inspectors can and do refer cases for prosecution.
Source: Ontario Building Code Act, 1992
The Stop-Work Order
When the City discovers unpermitted work in progress, the first thing that happens is a stop-work order. All construction must halt immediately — no exceptions — until you apply for and receive a permit.
That means your contractor is standing around (or gone), your renovation is half-finished, and you're living in the chaos while the permit application works its way through the system. Applications with stop-work orders don't get fast-tracked. They go through regular review.
Source: Working Without a Permit (toronto.ca)
You May Have to Tear It Down
Here's the one that really stings: the City can require you to undo completed work.
If an inspector can't verify what's behind the walls — the framing, the electrical, the plumbing, the insulation — they may require you to open it all up. Drywall comes down. Tile comes off. That finished basement gets un-finished.
And if the work doesn't meet code? You may have to do more work than you originally planned. Additional structural support. Fire separation. Upgraded mechanical systems. All at your expense.
Insurance Denial
This is the consequence most homeowners don't see coming until it's too late.
Home insurance policies typically exclude or deny claims for damage arising from unpermitted work. If your unpermitted electrical causes a fire, or your unpermitted plumbing causes a flood, your insurer can refuse the claim entirely.
Think about that for a moment. You save a few hundred dollars on a permit, and a year later your basement floods because of improperly installed plumbing. The insurance company pulls the permit history, sees no permit was issued, and denies your $80,000 claim.
It happens. Regularly.
The Resale Nightmare
Planning to sell your home someday? (You probably are.) Here's how unpermitted work comes back to haunt you.
When a buyer makes an offer, their lawyer orders a Property Information Report from the City. This report shows every permit ever issued for the property — and every permit that should have been issued but wasn't.
If the buyer's lawyer spots a finished basement with no permit, an addition that doesn't match the original plans, or open permits that were never closed, here's what happens:
- The deal stalls. The buyer's lawyer advises against closing until permits are resolved.
- The buyer demands a price reduction — often $10,000–$50,000+ to cover the cost of retroactive permits, engineering reports, and remediation.
- The buyer walks away. In a competitive market, they'll just buy a house without permit problems.
- Title insurance may not cover it. Many title insurance policies exclude known code violations.
One real estate lawyer in Toronto put it bluntly: unpermitted work is one of the most common deal-killers in residential real estate.
"My Contractor Said I Don't Need a Permit"
Let's be clear about something: the homeowner is legally responsible for ensuring permits are in place — not the contractor. If your contractor tells you a permit isn't needed and they're wrong, you're the one who faces the consequences.
Good contractors pull permits as a matter of course. If a contractor tells you not to bother with a permit, that's a red flag about their professionalism, not a green light to skip the process.
Source: Homeowner Responsibilities (fridmar.com)
What to Do If You've Already Built Without a Permit
If you're reading this and realizing you may have unpermitted work, here's the path forward:
- Don't panic. The City's goal is code compliance, not punishment.
- Apply for a retroactive permit. Yes, you'll pay the 50% surcharge. It's still cheaper than the alternatives.
- Hire a professional to assess whether the work meets current code. You may need engineering drawings or inspection access.
- Be prepared to open up walls if the inspector needs to verify concealed work.
- Get it resolved before you sell. It's far cheaper to deal with now than during a real estate transaction.
Need help figuring out what permits you might need? Use our free permit checker to find out in 60 seconds.
The Bottom Line
A typical residential permit in Toronto costs $214.79 to a few hundred dollars. The penalties for skipping it? A 50% surcharge, fines up to $50,000, insurance denial, torn-out work, and a house that's harder to sell.
The math isn't close.
Check if your project needs a permit or let PermitEasy handle the entire process — from application to approval. We make sure everything is done right the first time, so you never have to worry about what's lurking in your permit history.