Building Without a Permit in Ontario: Consequences and How to Make It Right

Under the Building Code Act, an individual can be fined up to $50,000 for a first offence and up to $100,000 for a subsequent one; a corporation up to $500,000, then up to $1,500,000. Those are the maximums for serious or repeat cases. In practice a first-time homeowner is more often fined in the low thousands – but on top of that come the normal permit fee, a work-without-permit surcharge (many municipalities add about 50% of the permit fee), and the cost of making the work meet Code, which is usually the bigger bill.

The municipality typically issues a stop-work order halting construction, then an order to comply requiring you to apply for the permit and bring the work up to Code. Covered work may have to be uncovered for inspection, and anything that cannot be made compliant – or is unsafe – can be ordered removed at your expense. If you ignore the orders, they can prosecute under the Building Code Act, which is where the large fines apply. Co-operating early almost always costs less than fighting it.

Usually yes – it is called a retroactive or after-the-fact permit. You document what was built with as-built drawings, file the permit application (often with a surcharge), and let the inspector verify it, which can mean opening covered work back up. Anything not to Code gets corrected, then the permit closes. It costs more and is more hassle than doing it up front, but it is the clean way to make unpermitted work legal, insurable, and sellable. We handle these.

They can, but it is the last resort, not the first. The usual path is a permit and corrections to bring the work up to Code. Removal is ordered when the work cannot be made compliant or it poses a safety risk – for example, structural work that cannot be certified, or a building that violates zoning setbacks. The way to avoid demolition is to engage early, document what is there, and fix what needs fixing rather than ignoring the order.

It can. If unpermitted work causes or contributes to a loss – a fire traced to DIY wiring, water damage from a moved drain – your insurer can deny the claim, and you could lose far more than any fine. Even without a loss, undisclosed unpermitted work can be a problem at renewal or sale. Closing out the work with a retroactive permit and inspection is what restores your standing.

Find out exactly what was done without a permit before you close, because once you own it, the problem and the cost to fix it become yours. Options include making the purchase conditional on the seller obtaining a retroactive permit, negotiating a price reduction to cover the fix, or budgeting to legalize it yourself after closing. Either way, get as-built drawings and a realistic estimate to bring it to Code first – we can assess it and tell you what it will take.

Yes – genuinely minor, cosmetic, like-for-like work is permit-free: painting, flooring, swapping a fixture in the same spot, small non-structural repairs. The trouble is assuming your project qualifies when it does not. Structural changes, new or moved plumbing or wiring, decks above a certain height, second units, and anything touching a life-safety item need a permit. Confirm project by project on our do-I-need-a-permit guide before you decide to skip it.