The short answer first. Published Ottawa pricing for 2026 puts a bathroom renovation in three bands (Renos Group Ottawa pricing guide):
| Tier | Published Ottawa range | What it usually means |
|---|---|---|
| Refresh | $9,000 – $15,000 | New vanity, toilet, fixtures, lighting and flooring. Plumbing stays where it is, and the tub or shower is kept or replaced like for like. |
| Mid-range remodel | $15,000 – $30,000 | Taken back to the studs. New tile shower or tub surround with a waterproofing system behind it, new fan, new electrical, and minor layout changes. |
| High-end / custom | $30,000 – $50,000+ | Primary ensuites, curbless or large tiled showers, freestanding tubs, heated floors, custom vanities, and layouts where the toilet and drains move. |
The same guide puts most full remodels between $15,000 and $35,000. These are third-party figures, not our quotes, but they are the ballpark most Ottawa homeowners start from. The useful question is which end of the band your bathroom lands in. That is decided by five things, and all of them can be checked before anyone gives you a number.
Why bathrooms cost what they do
The same guide estimates that bathroom work is about 77% labour. That surprises people who have priced tile and vanities at a showroom, but it matches what happens on site. A bathroom packs plumbing, electrical, ventilation, carpentry, waterproofing and tile into a few square metres, and each trade has to finish before the next can start.
It is also why a small bathroom is not a small price. A powder room or a 5-by-8 main bath needs most of the same trades as a larger room, each with its own setup, inspection points and curing times. Size moves the tile and material lines. It does not move the sequence. The guide puts active on-site construction at two to three and a half weeks for a bathroom, and almost none of that time can be compressed.
1. Does the plumbing move?
This is the biggest fork in any bathroom quote. If the toilet, sink and shower stay roughly where they are, the plumbing is connection work and the floor stays largely closed.
Moving the toilet changes the job. A toilet drain is larger than the others and relies on gravity, so it needs a set slope back to the stack. Usually that means opening the floor and re-running the drain through the joists, which makes it a structural question as well as a plumbing one. Sinks and showers move much more easily. If you want a new layout on a finite budget, keeping the toilet where it is and rearranging everything else around it often gets you most of the change for much less. We go into this in bathroom renovations in Ottawa: what actually drives the cost.
2. What is behind the tile?
Bathrooms fail from water, and the damage starts on the inside. When we open an older bathroom, the usual finds are tile set over a backing that was never suitable, a shower pan that has been leaking slowly into the subfloor, and a previous renovation that tiled straight over the old surface.
Age adds to that list. An older Ottawa house can have several generations of plumbing in one wall, and Health Canada notes that floor tiles and other building materials in older homes may contain asbestos. Old sheet flooring buried under a newer layer is a common bathroom find, and testing comes before demolition.
None of this shows on a walkthrough. That is why we write a contingency into bathroom quotes instead of a flat number that assumes the subfloor is fine. A quote without one is not cheaper. It just postpones the cost conversation to the middle of the job, when you have no leverage and no working bathroom.
3. The shower you choose
The shower is where the mid-range and high-end tiers split.
- Keeping the tub, or replacing a tub like for like, is the economical option. The drain and the wall framing stay where they are.
- Converting a tub to a walk-in shower is one of the most common requests in 1990s and 2000s homes. It needs a properly sloped base, a full waterproofing system and usually a glass enclosure. Our guide to bathroom renovations in Stittsville and Barrhaven covers this conversion in production-built homes.
- A curbless shower has no lip at the entry, so the shower floor has to sit lower than the bathroom floor around it. That often means reworking the subfloor or framing, and it is a big part of why custom showers land in the top tier.
Whatever you choose, the waterproofing behind the tile is the line item that decides whether the room is still sound in fifteen years. Tile and grout are not waterproof. When a bathroom quote is unusually low, check this line first.
4. Fan, wiring and heat
Ottawa winters put a lot of humidity into bathrooms. An undersized fan, or one ducted into the attic instead of outside, causes peeling paint, mould at the ceiling line and eventually damage inside the walls. Fixing it during a renovation is cheap, and difficult afterwards.
New lighting, a GFCI-protected circuit or a heated floor all involve electrical work, and in Ontario electrical work you hire out must be done by a Licensed Electrical Contractor who files the notification with the Electrical Safety Authority. That is a real cost, and a quote should show it.
5. Finishes and allowances
Finishes are where your choices show, and where a quote can look cheaper than it really is. An allowance is a placeholder for something you have not chosen yet, such as tile, a vanity or fixtures. A $1,500 vanity allowance and a $4,500 one produce very different totals for what looks on paper like the same bathroom.
When you compare quotes, compare the allowances first. It is the fastest way to tell whether you are looking at the same bathroom twice or at two different projects.
Basement bathrooms
A basement bathroom is priced differently from an upstairs one, because the plumbing has to reach the drains through concrete.
If the builder left a rough-in, the capped drain stubs in the slab, the bathroom connects to plumbing that is already there. If it did not, or the layout needs the fixtures somewhere else, the slab is cut, trenched and re-poured to run new drain lines at the correct slope. The finished room looks the same either way. The price does not.
Published Ottawa pricing shows the effect at whole-basement scale: a standard open basement runs around $35,000 to $55,000, and adding a 3-piece bathroom, a subfloor membrane and separate rooms takes the mid-range to $55,000 to $90,000 (Renos Group). If a basement bathroom is part of a larger finish, our guides to basement renovations in Barrhaven and Stittsville and Nepean cover the permit, moisture and egress sequence that comes with it.
HST: the 13% that changes the comparison
Ontario’s 13% HST applies to renovation labour and materials. On a $24,000 bathroom that adds $3,120, which is plenty to make the cheaper-looking quote the more expensive one. Ask every contractor whether their number is before or after tax, and compare like with like.
The permit question
Replacing fixtures and finishes in the same positions generally does not need a building permit in Ottawa. Moving plumbing, altering structure or changing ventilation can. Since those changes are common in a mid-range or custom bathroom, confirm your scope with City of Ottawa Building Code Services at 613-580-2424 rather than assuming. When a permit is needed, we prepare the drawings and handle the application as part of the job.
How to read a bathroom quote
A bathroom quote you can actually compare lists these items separately:
- Demolition and disposal, including protecting the rest of the house.
- The plumbing scope, stating plainly whether anything moves.
- The waterproofing system for the shower or tub surround, named, not just “tile”.
- Ventilation, fan size and where it vents.
- Electrical, done by a licensed electrical contractor.
- Allowances, each with a dollar figure.
- A written contingency for what the walls and floor reveal.
- HST, shown as its own line.
Ontario gives you two protections worth knowing. The final price cannot exceed the estimate by more than 10% unless you agree to new work or a new price, and the same provincial guidance recommends a deposit of no more than 10% and at least three written estimates. Our guide to choosing a renovation contractor in Ottawa covers the rest of the checks.
Where the money is well spent
If the budget has to give somewhere, spend on the parts you cannot change later without tearing the room apart: the substrate, the waterproofing, the plumbing layout and the fan. Then spend on the things you touch every day, such as the taps, the toilet and the vanity drawers. Save on the decorative layer. Tile, paint, mirrors and lighting fixtures can all be changed later without opening a wall.
For how a bathroom compares with kitchens and basements on the same budget, see what a home renovation costs in Ottawa.
Getting a real number for your bathroom
No published range replaces looking at the room. We quote bathrooms at a fixed price after an on-site visit, with the plumbing decision, the waterproofing system, the allowances and the contingency written out line by line, so you can see which part of the price is the bathroom you chose and which part is the condition of the house.
The full scope is on our interior renovations page. We renovate bathrooms across Kanata, Stittsville, Barrhaven and Nepean, and out to Almonte.
Book a free on-site estimate. We will look at what is behind the tile, tell you which tier your bathroom really sits in, and send a written, fixed-price scope.
Published October 18, 2026 by ALM Construction & Landscaping. General information for Ottawa-area homeowners, not a substitute for the City's determination on your specific project.