It is the question that stops most Toronto bathroom projects before they start: does this need a permit? The honest answer is that it depends on one thing — whether you are changing the bones of the room or just what you see.
Here is how the line is drawn, what the process looks like, and why the "nobody will notice" approach tends to surface at the worst possible moment.
When a permit is required
A permit is generally required when you move or add a plumbing fixture — relocating the toilet, adding a second sink, or converting a tub to a shower in a new position.
It is also required when you modify drain, waste, or vent piping, remove or alter a load-bearing wall, change the size or location of a window, add a bathroom where there was not one before, or finish a basement bathroom as part of new living space.
When it is not
A permit is generally not required to replace fixtures in the same location — toilet, vanity, faucet, or tub for tub. The same applies to re-tiling floors and walls, painting, replacing a mirror, changing lighting fixtures on existing circuits, or swapping a vanity top and cabinet doors.
The dividing line is the rough-in. If the pipes behind the wall stay where they are, you are usually doing cosmetic work. The moment a drain moves, the City has an interest.
Requirements are set under the Ontario Building Code and administered by Toronto Building. Because interpretations vary by scope and by building, confirm your specific project with the City of Toronto before work begins — a single phone call settles it.
Condos have a second layer
If you live in a Toronto condo, the City is not your only approver. Your condominium corporation almost certainly requires written board approval before any bathroom work.
Most declarations ask for a description of the scope with drawings for anything involving plumbing, proof of your contractor's WSIB coverage and liability insurance, a certificate of insurance naming the corporation, a booked service elevator with restricted working hours, and a waterproofing spec — because you are working above someone's ceiling.
Board approval typically takes two to six weeks. Start it before you order materials, not after.
What the permit process actually involves
Scope and drawings come first. For a straightforward fixture relocation, a plumbing permit with a simple layout is usually enough. Structural changes need drawings.
The application is filed through Toronto Building, generally by the contractor. Fees for a residential bathroom are modest.
Then come inspections. The critical one is the rough-in inspection, done after plumbing and electrical are in the walls but before anything is closed up. Miss it and the wall comes back down.
Finally, once the work is complete and inspected, the permit is closed.
A competent contractor handles all of this. If a contractor tells you a plumbing relocation does not need a permit, that is useful information about the contractor.
Why skipping the permit costs more than getting one
Selling the home gets complicated. Buyers' lawyers ask about permits, and open or missing permits on record delay closings and get used to negotiate the price down.
Insurance gets complicated too. If a leak from unpermitted plumbing damages your unit or the one below, an insurer can decline the claim. In a condo, that liability travels.
The City can also issue an order to comply, requiring the work be opened up for inspection or removed entirely.
And it follows the house. "The previous owner did it without a permit" is not an answer that helps anyone.
The permit fee is a rounding error against a $20,000 renovation. The absence of one is not.
What we do at Solid Bath Pro
We pull permits where the scope requires them, coordinate the rough-in inspection, and handle condo board submissions including insurance documentation. If your project turns out to be purely cosmetic, we will tell you that too — there is no reason to file paperwork for a tile job.
Not sure which side of the line your project falls on? Send us your layout and we will tell you what it needs before you spend anything.