Do You Need a Permit for a Bathroom Renovation in Ottawa?

Updated: Aug 10

Short answer: if your renovation moves plumbing, changes wiring, alters a wall, or turns a room into a bathroom, you need a building permit from the City of Ottawa. If you are only replacing finishes and fixtures in their existing locations, you generally don't.

That single distinction — are you changing the systems, or just what you can see? — decides most bathroom projects in this city. Below is what actually triggers a permit, what the process looks like, and one thing that catches out nearly every homeowner: electrical work follows a completely separate approval track.

Permit or no permit: the quick version

Your project	Permit needed?
Repainting, new tile, new mirror, new vanity top	No
Swapping a vanity, toilet or faucet in the same spot, on the same lines	No
Replacing a tub with a new tub in the same footprint	Generally no
Converting a tub to a shower (drain relocated or resized)	Yes
Moving the toilet, sink or shower to a different wall	Yes
Removing or moving any wall	Yes — plus an engineer if it carries load
Adding a new bathroom (basement, attic, spare room)	Yes
Adding circuits, heated floors, a new fan or new lighting locations	Yes — and an ESA notification on top

If your project sits in the grey zone, the City's own wording is deliberately broad: installation, extension, material alteration or repair generally requires a permit. "Material alteration" is doing a lot of work in that sentence — and it covers more bathroom projects than most homeowners expect.

The three things that trigger a permit

You're touching structure

Removing a wall to widen a cramped 3-piece, framing a pony wall for a curbless shower, cutting a joist to make room for a relocated drain — all structural. Load-bearing walls need a stamped drawing from a structural engineer on top of the permit application, which adds both cost and lead time.

One under-appreciated case: notching or cutting floor joists for a relocated drain. Homeowners file this mentally under plumbing, and it is — but it's also structural, and it's the item most likely to get flagged at inspection when it was done without approval.

You're changing plumbing

New fixture, relocated fixture, extended supply or drain lines — permit territory. Same fixture, same location, same connections — usually not. The test isn't how big the job looks; it's whether anything behind the wall changes.

The room is changing its use

Turning a closet, laundry room or unfinished basement corner into a bathroom is a change of use, and it always needs a permit. Ceiling heights, ventilation, drainage and egress all get reviewed, not just the plumbing. If that's your project, the basement bathroom requirements are worth reading before you settle on a layout.

Electrical is a separate process—and this is where people get caught

Here's the part most guides gloss over. In Ontario, a City of Ottawa building permit does not cover your electrical work. Electrical is regulated provincially by the Electrical Safety Authority, and it needs its own approval — what the ESA calls a notification of work, and what everyone else calls an electrical permit.

Two separate systems, two separate inspections, two separate pieces of paper:

	Building permit	ESA notification
Who issues it	City of Ottawa	Electrical Safety Authority (province-wide)
Covers	Structure, plumbing, layout, ventilation	All electrical work
Who files it	Owner or contractor	Your Licensed Electrical Contractor
When	Before work starts	Before work starts, or within 48 hours of starting
You end up with	Final building inspection sign-off	ESA Certificate of Acceptance

A bathroom is one of the most heavily regulated rooms in the house electrically, for the obvious reason: water and electricity in a confined space. GFCI protection, clearances around the tub and shower, fixtures rated for wet locations, and an exhaust fan that actually vents outside rather than into the joist bay — all of it gets inspected.

If you hire anyone to do electrical work in Ontario, the law requires that person to be a Licensed Electrical Contractor, and they file the notification — not you. Ask for the ECRA/ESA licence number before work starts, and ask for a copy of the certificate when it's signed off. Keep it: your insurer and, eventually, your buyer's home inspector will both want to see it.

The homeowner is on the hook too

This surprises people. ESA's administrative penalties regulation lists hiring or sub-contracting an unlicensed contractor as a contravention in its own right — applying to general contractors, facility owners and homeowners alike. Penalties run up to $10,000 per contravention, and there can be more than one per job.

It isn't theoretical, and it isn't only a Toronto problem. In 2024, ESA prosecuted an unlicensed Ottawa electrician and his renovation company: the fine and victim surcharge together came to over $40,000, plus two years' probation.

The permit mistakes we see most often

After more than 50 bathroom renovations across Ottawa, we keep seeing the same permit assumptions trip people up. Here's where homeowners most often get it wrong:

The assumption	The truth
"Cosmetic work like tile and paint doesn't need a permit."	True on its own — but the moment plumbing, walls, or wiring are touched in the same project, the whole project falls under permit rules.
"My contractor is pulling the permit."	Get it in writing. Some contractors skip this step to move faster, and the liability lands back on the homeowner whose name is on the property.
"Electric heated floors don't need anything special."	In-floor electric heating is still an electrical circuit. It needs ESA notification and, in most cases, a dedicated GFCI-protected circuit inspected before the floor goes down.
"It's a small basement bathroom, so it's exempt."	Adding a bathroom where one didn't exist changes the use of the space and almost always triggers both a building permit and a plumbing inspection.
"I'll get the permit after the work is done, just in case."	Retroactive permits let the City require you to open up finished walls and floors to verify the work — which costs far more than doing it right the first time.

What the process actually looks like

In practice, it plays out like this:

Planning: you (or your contractor) decide what's changing — layout, plumbing, electrical, structure.
Drawings: a simple sketch for cosmetic-plus jobs, or stamped drawings if structure is involved.
Application: the building permit application goes in to the City of Ottawa, with the ESA notification filed separately for the electrical portion.
Review: City staff review the application; this typically takes 10–15 business days depending on scope and current volume.
Permit issued: the permit is printed and posted on site, visible from the street or entrance.
Rough-in inspection: once walls are open and plumbing and wiring are run but not yet closed up, the inspector checks the work behind the walls.
Close-up and finishing: drywall, tile, fixtures, and cosmetic work proceed once rough-in passes.
Final inspection: the building inspector signs off, and the ESA issues its Certificate of Acceptance for the electrical work.

Who pulls the permit — you or your contractor?

Either can, but only one name should be on the permit. If your contractor is pulling it, ask for the permit number early and check its status yourself on the City's portal. If you're pulling it as an owner-builder, understand that the compliance responsibility sits with you