There is a short window in every new build when the walls are open, the plumber is on site, and almost anything is possible for the cost of a fitting and an hour of labour. Then the drywall goes up and the price of those same decisions multiplies. Whether you are building in the Vancouver suburbs, on the Prairies, or outside Halifax, the worth-it list is remarkably consistent. Here is what second time builders wish someone had told them.
Why the framing stage is the cheap stage
Once a wall is closed, every change behind it means demolition, patching, repainting and often re-tiling. A supply line moved 30 centimetres at rough-in costs almost nothing; the same move after tile can cost more than the fixture it serves. That asymmetry is the whole argument. You do not need every finish fixture on day one, since faucets and showers ship in two stages anyway; our guide to rough-in versus trim explains that split. You just need the walls ready for the fixtures you will eventually want.
Upgrade the shower valve while the wall is open
Builders typically spec a basic pressure balance valve because it meets code and keeps the quote low. A thermostatic valve holds your set temperature precisely, handles multiple outlets properly, and is the foundation for any future shower system with a rain head, hand shower or body sprays. The valve is the one part of the shower buried in the wall, so it is the hardest component to change later. Brands like Riobel and Kalia build thermostatic rough-ins that accept a wide range of trim styles, so you can defer the finish decision without deferring the plumbing. Read our breakdown of pressure balance versus thermostatic valves, then browse shower valves to see the options.
Rough in a toilet carrier, even if the wall-hung bowl comes later
Wall-hung toilets free up floor space, make cleaning easier, and let you set the bowl height to suit your household. The catch is the steel carrier and concealed tank, from makers like Geberit, which must be framed into the wall before it closes. Retrofitting one into a finished bathroom is a full renovation; installing one at framing is routine work. Even if you start with a standard floor-mount toilet, framing the wall to accept a carrier later keeps the option alive. Our guide to measuring toilet rough-in covers the floor-mount side of that question.
Blocking costs lumber scraps today and a wall tomorrow
Blocking is solid wood fastened between studs so that whatever hangs on the wall later anchors into structure instead of drywall. It takes a framer minutes and uses offcuts. Skipping it is the most common regret we hear from renovators. Plan blocking for:
- Grab bars, in every bathroom, not just the accessible one. Modern grab bars look like towel bars anyway, and blocking now lets any bathroom adapt for aging in place without opening walls.
- Wall-mount vanities. A floating vanity loaded with stone and water puts real load on its fasteners. Blocking is the difference between confidence and a slow sag.
- Shower doors and frameless glass panels, which concentrate weight on a few hinge points.
- Towel bars, robe hooks, wall-mount faucets and heavy mirrors or medicine cabinets.
Photograph every wall after blocking and rough-in, with a tape measure in frame, before insulation goes in. Those photos are the cheapest insurance you will ever buy.
Frame the niche and the bench, do not bolt them on
A recessed shower niche framed between studs costs little and gives you tiled, permanent storage instead of a rusting wire caddy. A bench framed at this stage can be properly sloped, waterproofed and tied into the structure. Both are miserable to add after tile, and both make a shower feel custom rather than builder-basic. If you are ordering a base instead of tiling the floor, check our shower base sizing guide before framing locks in your drain location.
Place the drain for the tub you might want in ten years
Plenty of new builds start with a standard alcove tub and a plan to go freestanding later. That upgrade lives or dies on decisions made now. Freestanding tubs from brands like Victoria + Albert and Cheviot drain near the centre of the room rather than at a wall, and a floor-mount tub filler needs supply lines stubbed up through the floor in exactly the right spot. Ask your plumber what it would take to rough in for both scenarios, or at least to leave accessible routing below. If a soaker is in your future, skim the freestanding bathtub buying guide while moving a drain is still a small line item, and see what is possible in freestanding bathtubs.
Think in conduit: power where fixtures are heading
The clearest trend in bathrooms is electrification, and houses framed this year will live with these decisions through decades of Canadian winters. Cheap moves at framing:
- A grounded outlet behind the toilet. Every smart toilet and washlet-style bidet seat, including TOTO's, needs power, and a heated seat is an easy sell in a Canadian February. Our smart toilet guide covers what these fixtures require.
- Wiring, or an empty conduit, to the mirror location for lighted and defogging mirrors.
- Conduit to the shower area for future digital controls or steam.
- Heated floor wiring, or conduit for it, before the floor assembly closes.
Empty conduit with a pull string is the cheapest optionality in construction. You may never use it. If you do, it pays for itself many times over.
Cold-climate details worth insisting on
From Whitehorse to Winnipeg to Quebec City, keep supply lines out of exterior walls wherever possible, insist on proper insulation behind any that cannot move, and ask for tub and shower valves to sit on interior walls. The National Plumbing Code sets the baseline across Canada, but provinces and municipalities amend it, so let your local plumber and inspector have the final word.
The day-two regret list
Compiled from real renovations: no blocking anywhere, a basic valve buried under imported tile, a toilet outlet that requires opening a finished wall, a niche that never got framed, a drain location that rules out the freestanding tub, and no photos of the open walls. Every one was nearly free to prevent. If you build or plumb for a living, our trade program can help you source fixtures with Canada-wide shipping.
Frequently asked questions
Do I need to buy all my fixtures before framing?
No. You need decisions, not boxes. Rough-in valves and carriers must be on site for the plumbing stage, but trim kits, faucets, toilets and accessories can arrive later. Just make sure the rough-in matches the trim families you intend to buy, and give your plumber spec sheets early.
Can blocking be added after drywall?
Yes, but it means cutting the wall open, adding the wood, patching and repainting, and in a tiled shower it is usually not practical at all. That is why blocking at framing is such a lopsided bargain: minutes of labour now versus a small renovation later.
Does a wall-hung toilet need a special wall?
It needs a wall framed to accept the carrier, which houses the tank and supports the bowl. Carriers suit common stud constructions, but depth, stud spacing and drain position must be planned before the wall closes, which is why this is a day one decision.
Will these upgrades pass inspection anywhere in Canada?
Fixtures sold for the Canadian market should carry CSA or cUPC certification, and everything above is standard practice. Requirements still vary by province and municipality, so confirm details like valve type and outlet placement with your local inspector or licensed plumber before rough-in.
