A bathroom remodel runs in this order: planning and permits, demolition, plumbing and electrical rough-in, inspection, insulation and wallboard, waterproofing, tile, fixtures, then final inspection and punch list. The order matters because most steps hide the one before them. Once a wall is closed or a membrane is tiled over, fixing a mistake means tearing out good work. This guide walks through each stage as it works in Toronto and the GTA, what has to cure or be inspected before the next trade arrives, and where homeowners lose time and money.
TL;DR
- The professional sequence in Ontario is planning and permits, demolition, rough-in, inspection, waterproofing, wallboard and tile, fixtures, final inspection.
- Closing walls before the plumbing and electrical inspection is the most common cause of costly rework.
- Waterproofing needs to cure before tile, and a custom glass shower screen can only be measured after tile, so build in waiting time.
- Settle the layout, fixtures and budget before demolition. Changing your mind after the walls are open is the expensive version of a design decision.
- In a pre-1990 home, test for asbestos before anything is scraped, drilled or broken.
Table of Contents
- Why the order matters more than the speed
- Stage 1: Planning, decisions and permits
- Stage 2: Demolition
- Stage 3: Framing and subfloor repairs
- Stage 4: Plumbing and electrical rough-in
- Stage 5: Rough inspection
- Stage 6: Insulation and wallboard
- Stage 7: Waterproofing
- Stage 8: Tile and flooring
- Stage 9: Glass, vanity, fixtures and finishes
- Stage 10: Final inspection and punch list
- Sample timeline
- Our perspective: a bathroom is a small renovation with big consequences
- When the bathroom is part of a bigger project
- FAQ
- Sources
Why the order matters more than the speed
A bathroom is the smallest room in the house with the most trades in it: demolition, plumbing, electrical, framing, insulation, drywall, waterproofing, tile, glass, cabinetry and paint. Each one depends on the one before. Nobody can tile until the membrane is cured, and nobody can cure a membrane until the walls are flat. Nobody should close a wall until the inspector has seen what is inside it.
That is why a quote promising a very fast bathroom should raise questions. The slowest parts of the job are not labour. They are fixed technical dependencies: waterproofing membranes need a full cure, often 24 to 48 hours, before tile starts, and custom frameless glass cannot be measured accurately until the tile is in, which can mean a one to two week wait for fabrication. A schedule that ignores these is a schedule that will slip.
Stage 1: Planning, decisions and permits
Everything that goes wrong later is usually decided here. A rough-in decision shows up as a fixture that will not fit. A tile decision shows up as a floor that ponds water. A bathroom mistake typically becomes visible in a later phase than the one that caused it, so the cheapest fix is always at the planning table.
Before demolition, settle these:
- Layout. Does the tub, toilet and vanity stay where they are, or move? Moving a toilet or shower drain changes the plumbing, the floor framing and the permit.
- Fixtures and materials. Choose and order the vanity, toilet, shower valve, tile, glass and fan before work starts, so the rough-in matches the actual products and nothing is on backorder when the crew is ready.
- Budget. Set it including 13% HST and permit fees before you compare quotes. Leaving these out is a common reason for a mid-project shortfall.
- Permits. In Toronto, permits are generally needed to move plumbing fixtures, add a bathroom or alter structure. Electrical work needs a notification filed with the Electrical Safety Authority (ESA). A like-for-like swap in the same spot is a different conversation, so confirm with the city or your builder before you assume either way.
- Start date in writing. A signed quote is not a confirmed crew start. Get the date in writing so materials are not sitting in storage while your contractor finishes another job.
If your house was built before 1990, add one more item: asbestos. It was commonly used in drywall mud, plaster, tile mastic and insulation. Health Canada advises hiring a professional to test before renovating, and if asbestos is found, a qualified specialist should remove it. Undisturbed, sealed material is not a significant risk. Demolition is exactly what disturbs it, so test first.
For how this planning phase fits into a whole-house project, see our 8-stage renovation process.
Stage 2: Demolition
Demolition strips the room back to studs and subfloor: fixtures, tile, vanity, drywall or plaster, and sometimes the old floor underlayment. Protect the path through the house, seal the doorway with plastic and set up dust control, because bathrooms in older Toronto homes often sit above finished rooms.
This is also the stage where the room tells the truth. Typical discoveries:
- Rot or staining around the tub or toilet flange.
- Old galvanized or cast iron pipes that no longer justify being reused.
- Walls with no insulation, or insulation in poor shape.
- Outdated wiring or an exhaust fan that dumps into the attic.
A good plan carries a contingency for these, and a good builder shows you the photos rather than describing them after the fact. If you find a slow leak, the subfloor deserves attention before anything new goes on top of it. This explainer on protecting subfloors when a toilet leaks at the base shows how quickly a small seep can damage the floor structure, which is exactly what you want to catch now, while the room is open.
Stage 3: Framing and subfloor repairs
Before the pipes go in, the structure has to be right. If you are moving a shower, building a niche, relocating a toilet or changing the floor to accommodate a curbless entry, the framing and subfloor are modified now. Blocking for grab bars, heavy vanities and wall-mounted fixtures is added now too, while the studs are visible and before anyone forgets where it needs to go.
This is the stage where a shower pan or a recessed floor is formed. If a curbless shower is on your wish list, read our curbless shower cost breakdown, because it depends on floor work that has to be planned at this point, not after the tile arrives.
Stage 4: Plumbing and electrical rough-in
Rough-in is the installation of everything that will end up behind the walls: supply lines, drains, vents, the shower valve body, wiring, boxes, the exhaust fan duct and any in-floor heat. Plumbers and electricians work before drywall because they need open framing.
Three points deserve your attention:
- Ventilation. Per the Ontario Building Code, a bathroom exhaust must vent to the exterior, not the attic. Moist air in an attic breeds mould and rots sheathing.
- Licensed electrical work. Electrical work should be done by a Licensed Electrical Contractor who files the ESA notification. ESA is the body that issues the Certificate of Acceptance that insurers and future buyers may ask for.
- GFCI protection. Receptacles near sinks, tubs and showers need ground fault protection, which your electrician should specify in the rough-in plan.
Walk the room with the plumber and electrician before they leave. Confirm the valve height, the vanity drain position, the mirror and sconce boxes and the fan location against your actual fixtures. Moving a box now takes minutes. Moving it after drywall takes a patch and a repaint.
Stage 5: Rough inspection
The inspection is a hold point. Nobody closes the walls until the plumbing, electrical and, where applicable, building inspections are signed off. ESA's own guidance is clear that you should not conceal electrical work before it has been reviewed.
Skipping or rushing this step is the one that hurts most. Closing walls before the plumbing and electrical inspection is the most common cause of costly, mandatory rework. The inspector's calendar is outside your builder's control, so ask when the inspection is booked and what happens to the crew schedule while you wait.
Stage 6: Insulation and wallboard
With the rough-in approved, exterior walls are insulated and the room is closed in. In wet areas, the board choice matters: standard drywall does not belong behind a shower. Your builder should name the backer product and substrate for the shower and tub surround, and the board should be flat and tight, because every ripple turns into a crooked tile line later.
Joints outside the wet zone are taped, mudded and sanded. Dust control matters again here, and so does a primer coat if walls will be painted before tile. Many crews paint the ceiling now, following the top-down rule: ceiling, walls, then floors.
Stage 7: Waterproofing
This is the stage homeowners underestimate and builders obsess over. A shower is not waterproof because the tile is. Tile and grout are finishes. The waterproofing layer, whether a sheet membrane, a liquid-applied membrane or a foam board system, is what keeps water out of the framing.
It is also where treating something as a detail gets expensive. Industry professionals warn that treating waterproofing or permits as optional details rather than core infrastructure leads to costly failure.
What to expect:
- The membrane covers the shower floor, walls, niches, corners and the transition to the bathroom floor, following the manufacturer's method.
- Seams, corners and the drain are detailed with the manufacturer's components.
- The system cures, often 24 to 48 hours, before tile goes on. Some crews flood-test the pan before tiling. Ask if yours does.
The cure is a reason your schedule has a gap in it. That gap is protecting you.
Stage 8: Tile and flooring
Tile follows waterproofing. Floors are usually set first in the main bathroom area, then the shower walls, though sequence varies with the design. Tile layout is planned before the first piece goes down: where the pattern centres, where the cuts land, how the niche lines up and how the floor slopes to the drain.
Allow time for thinset to set before grouting, and for grout to cure before the shower is used or sealed, following the product instructions. Heated floors, if you are installing them, are tested before and after tile.
The first tile day is also the point of no return for your design. Changing a design decision after demolition has begun, such as moving the shower to another wall, is a classic source of cost and delay. Finish deciding before the contract, not during the build.
Stage 9: Glass, vanity, fixtures and finishes
Once the tile is set, the final measurements can be taken for a custom frameless shower enclosure. Fabrication of that glass is the long wait at the tail of the project, and it is why a bathroom that looks finished may not be usable for another week or two. If your timeline is tight, ask your builder to line up the glass fabricator before tile is complete so the measuring appointment is booked.
Then the finishing trades arrive in a sensible order:
- Vanity and countertop, once the floor is complete.
- Toilet, set on a new wax ring or seal and secured to the flange.
- Plumbing trim: faucets, shower valve trim, drain covers.
- Electrical trim: lights, fan grille, switches, receptacles.
- Mirrors, accessories, towel bars, glass and final paint touch-ups.
Set the toilet and check the base for movement and leaks now, not three months later.
Stage 10: Final inspection and punch list
Final inspection confirms the permitted work is complete, and the ESA issues its Certificate of Acceptance for electrical work. Keep these papers with your house records, because they are the proof that the work was done legally when you sell or make an insurance claim.
Walk the room with your builder and make a punch list: paint nicks, grout lines, door and drawer alignment, caulk, fan performance, water drainage and hot water at the shower. Run the fan, run the shower, and look at the ceiling afterwards. Do not release the final payment until the list is closed and the permit paperwork is in your hands.
Sample timeline
There is no single standard, because material lead times and inspector availability vary. The table shows the order of dependencies, not promised durations.
| Stage | Depends on | Typical hold point |
|---|---|---|
| Planning and permits | Decisions, quotes | Permit issued |
| Demolition | Permit, asbestos test if older home | Hidden conditions revealed |
| Framing, subfloor | Demolition | Layout locked |
| Plumbing, electrical rough-in | Framing | Rough inspection |
| Insulation, wallboard | Inspection passed | Surfaces flat |
| Waterproofing | Wallboard | Membrane cure, often 24 to 48 hours |
| Tile | Cured membrane | Thinset and grout cure |
| Glass | Finished tile | Fabrication, often 1 to 2 weeks |
| Fixtures, trim | Tile, paint | Final inspection |
Our perspective: a bathroom is a small renovation with big consequences
We build full-home renovations and additions, and bathrooms are rarely a stand-alone job in the houses we work on. In an older Toronto house, moving a bathroom often means opening a floor, rerouting a stack or reworking a wall that is also holding up something above. That is why we begin with a feasibility check before drawings, not after.
Three things we hold to:
- One accountable person. On our projects the owner talks to one builder, not a relay of trades. When the plumber's rough-in and the tile layout disagree, one person resolves it before it becomes a change order.
- Decide before demolition. The cheapest change is the one made on paper. We would rather spend an extra week on scope and selections than an extra month reworking a finished wall.
- Respect the hold points. Inspection and cure times are not delays. They are what keeps a good bathroom from becoming a warranty problem.
If you want to see how cost control works on these projects, we have written about keeping a renovation on budget and about fixed price versus cost-plus contracts in Ontario. If your bathroom involves a layout change, see also architect versus BCIN designer to understand who draws what.
— Cory
When the bathroom is part of a bigger project
If the bathroom is one part of a whole-house renovation or an addition, the sequence above sits inside a bigger one, and the trades overlap with structural work, mechanical upgrades and kitchen work. Our full-home renovation service covers feasibility, budget planning, permits, designer and engineer coordination and construction management under one point of contact. For a bathroom in a new rear or second-storey space, see our home additions page, and for what it costs overall, our Toronto renovation cost guide.
FAQ
What is the correct order to renovate a bathroom?
Plan and permit first, then demolish, rough in the plumbing and electrical, pass inspection, insulate and board the walls, waterproof, tile, install fixtures and glass, and finish with final inspection. Each step hides or depends on the one before it, so the order is not flexible.
How long does each stage take?
It depends on the scope and on inspector and supplier calendars. Two fixed waits are worth planning around: waterproofing needs to cure, often 24 to 48 hours, and custom frameless glass usually takes one to two weeks to fabricate after tile is installed.
Do I need a permit for a bathroom remodel in Toronto?
Generally yes if you move plumbing fixtures, add a bathroom or change structure, and electrical work needs an ESA notification. A cosmetic update in the same layout may not. Confirm with the City of Toronto or your builder before starting.
Can I change the layout once demolition has started?
You can, but it is the costliest time to do it. It can change the rough-in, the permit and the material orders. Lock the layout, fixtures and tile before the contract is signed.
Do I need to test for asbestos?
If the home was built before 1990, yes, before disturbing walls, plaster, tile adhesive or insulation. Health Canada advises hiring a professional to test, and a qualified specialist to remove anything found.
Sources
- Bathroom Renovation Order of Work: The Right Sequence
- Biggest Bathroom Renovation Mistakes (and How to Avoid Them)
- Bathroom Renovation Mistakes: 15 Costly Errors to Avoid
- Asbestos and your health, Health Canada
- ESA Inspection Brochure
- ESA Plugged In, Summer 2022
- Do-It-Yourself Electrical Work, ESA