Quick Answer
How do you plan a bathroom renovation in Ontario?
Settle your scope first, then your budget, then your contractor. Decide whether you need a cosmetic refresh, a mid-range renovation or a full gut. Next, confirm whether you are moving plumbing, because that single choice swings the price 20 to 35 percent. Then hire a licensed contractor who can explain their waterproofing and pull the permits. Everything else follows from those three decisions.
Cosmetic refresh
$3,000 to $8,000 · 3 to 7 days
Mid-range
$10,000 to $20,000 · 2 to 4 weeks
Full gut
$20,000 to $40,000+ · 4 to 8 weeks
Permit needed?
Yes, once you move any drain
Want a real number for your bathroom instead of a range? Get a free quote from Smart Renovations, serving Toronto, Richmond Hill, Woodbridge and the wider GTA.
Homeowners search for a bathroom renovation guide more than almost any other home improvement topic, and the reason is simple. Whether your bathroom feels cramped, looks dated, leaks quietly behind the tile, or just annoys you every morning, you probably do not know which end to start from. So this guide maps the whole journey: scope, budget ranges, stages, permits, waterproofing and ventilation. It does not go deep on any single topic. Instead, it gives you enough to work out where you stand before you spend a dollar.
Written by the Smart Renovations project team
We have planned, permitted and built kitchen and bathroom renovations across the Greater Toronto Area since 2017. Every cost range, timeline and code reference below reflects Ontario Building Code requirements and the projects we run in Toronto, Richmond Hill, Woodbridge and Vaughan. Where we cite outside data, we name the source.
Key Takeaways
- Ontario bathroom renovations split into three tiers: cosmetic, mid-range and full gut. Each carries very different costs and timelines.
- Never skip waterproofing. Cut that corner and you invite rot, mould and structural damage.
- Wet zones and dry zones follow different material and code rules, so knowing the difference saves you expensive mistakes.
- Moving a plumbing fixture almost always triggers a permit under the Ontario Building Code.
- Treat ventilation as code, not comfort. It is your front-line defence against mould.
- Ontario labour and material costs steadied through 2026, which makes this a reasonable window to plan and budget.
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What’s Happening Right Now in the Ontario Bathroom Renovation Market
Before you plan anything, take stock of the market around you. Four trends matter right now.
Costs Have Steadied
Statistics Canada data shows Ontario residential renovation costs easing 2.3 percent year over year, the first decline since 2020. As a result, you get more predictable timelines and better trade availability than you did two years ago.
Contractor Choice Is the Number One Risk
A January 2026 industry study on Toronto bathroom renovations found that poor contractor selection drives more budget overruns and delays across the GTA than material costs or hidden structural problems.
Sustainability Became the Baseline
Dual-flush toilets, low-flow faucets and LED lighting moved from optional to expected in 2026 GTA projects. Water-saving fixtures cut household water use by up to 30 percent, which trims roughly $120 to $150 a year off utility bills.
Design Turned Bolder
Across the GTA, homeowners now pick materials that feel permanent: bold natural stone, grout-free microcement shower walls, deep greens and charcoal palettes. In short, people renovate for the next decade rather than next year’s listing photos.
Step One: Which Scope of Bathroom Renovation Are You Actually Doing?
Answer this question first. Most homeowners get it wrong, because they picture one project and then discover mid-build that they needed another. Here is how to sort yourself into the right tier before anyone swings a hammer.
| Tier | Typical Budget | Timeline | Permit | Plumbing Moves |
|---|---|---|---|---|
| Cosmetic refresh | $3,000 to $8,000 | 3 to 7 days | Usually no | None |
| Mid-range | $10,000 to $20,000 | 2 to 4 weeks | Sometimes | Reconnected, not relocated |
| Full gut | $20,000 to $40,000+ | 4 to 8 weeks | Yes | Relocated as needed |
Add 2 to 4 weeks of permit processing before work starts, depending on your municipality.
Not sure which tier your bathroom actually needs?
Most homeowners guess one tier too low, then get surprised during demolition. Send us photos and rough dimensions. We will tell you honestly which tier fits, and we will say so if a cosmetic refresh is all you need.
Bathroom Renovation Budget: What to Expect in Ontario
The HomeStars 2026 Canadian Home Renovation Report puts average full bathroom remodel costs in Ontario between $9,000 and $16,000. Toronto homeowners, however, typically spend $15,000 to $18,000 for a complete renovation. Small bathrooms land at $8,000 to $12,000, while larger or luxury builds reach $25,000 to $40,000 and beyond.
So what drives the number most? Moving plumbing. Keep your toilet, sink and shower drain where they sit and you save 20 to 35 percent against a layout change. That is not always possible, yet it is always worth asking your contractor before you commit to a floor plan.
For a detailed breakdown by scope, labour, material and GTA municipality, read our Bathroom Renovation Cost Guide 2026.
And if you cannot tell which materials justify their price, whether that means tile grades, vanity construction or countertop options, our Kitchen and Bathroom Renovation Materials Guide shows you how to evaluate each choice before you buy. It covers both rooms, so read it early in your planning.
Pro Tip
Collect three quotes and compare them side by side. The cheapest one rarely wins on value. Instead, read what each includes, what it excludes, and how precisely it writes the scope. Vague quotes turn into surprise invoices later. Our guide on how to compare renovation quotes walks you through exactly what to line up.
The Bathroom Renovation Stages: What Happens and in What Order
A bathroom renovation follows a strict sequence. Skip a step or run them out of order, and someone ends up opening finished walls to fix what sits behind them. Here is how a proper build unfolds.
Planning, Design and Permits
Lock the scope. Choose your fixtures, tile and layout. If the job needs permits, apply before anyone starts work, because fixing this step later always costs more.
Demolition
Out come the existing tile, fixtures, vanity and flooring. In a full gut, the wall material and sometimes the subfloor follow. Hidden problems surface at this stage, so expect rotted subfloor or old plumbing surprises to appear now rather than later.
Rough-In Plumbing
This happens before the walls close. If you are relocating the toilet drain, shower drain or sink drain, your plumber does it here. Bathroom rough-in runs more complex than a kitchen, because several wet fixtures share a tight space and each one needs correct venting and drainage slope. Never cut corners at this stage.
Electrical Rough-In
Your electrician runs new circuits for GFCI outlets, the exhaust fan, lighting and heated floor where applicable. Ontario requires a licensed electrician and an ESA permit for electrical work in wet zones, and your contractor should arrange both without being asked.
Waterproofing Membrane
This goes on before any tile. Shower walls, shower floor and tub surrounds all need a properly installed waterproofing layer. Ultimately, this single step separates a bathroom that lasts 20 years from one that rots within five.
Tile Installation
Floor tile goes down first, then wall tile in the shower or tub surround. Large-format tile needs a flat substrate, so the installer often applies self-levelling compound first. In wet zones, the grout has to be a proper waterproof product.
Fixture and Vanity Installation
In go the toilet, vanity, sink, faucets, shower fixtures, shower glass or curtain rod, towel bars and mirror. At this point the room finally looks like a bathroom again.
Final Inspections and Touch-Ups
Where you pulled permits, inspectors attend at set stages and your contractor manages the bookings. A final walk-through, caulking, paint touch-ups and a clean close out the project.
Waterproofing: The Most Critical Step in Any Bathroom Renovation
Your bathroom is the only room where water hits the walls on purpose, every single day. That is exactly why waterproofing matters more here than anywhere else in the house. The installer applies a proper membrane over cement board or tile backer in the shower and tub areas, sealing every corner, seam and drain connection before a single tile goes up.
Rush that step or skip it, and water eventually finds its way behind the tile. It only takes time. Once it gets there, you get rot in the subfloor, mould in the wall cavity and structural damage to the framing, and none of that repairs cheaply. So never accept a shortcut here. The membrane goes in before tile, full stop.
We break down the specific systems and membrane types in our Underfoot and Waterproofing Guide. If moisture has already caused problems in your home, our Mould and Moisture Prevention Guide covers what to look for and how to stop it recurring. Either way, the core message stays the same: ask your contractor how they handle waterproofing, and refuse a vague answer.
Pro Tip
Ask your contractor to show you the waterproofing product they plan to use and to explain how they seal the corners and the drain connection. A contractor who walks you through it clearly is a contractor who actually does it properly.
Wet Zones vs Dry Zones: Why Your Bathroom Follows Different Rules Than Your Kitchen
Not every part of your bathroom gets equally wet. The shower, tub surround and area around the toilet form the wet zone, so they take direct water contact and require waterproof materials, specific tile products and a membrane behind them. Meanwhile, the rest of the room, meaning the vanity area, the walls away from water and the storage, forms the dry zone, where you get more freedom in material selection.
This distinction decides which tile you can use, how the grout gets sealed, which backer goes behind the wall, and what your contractor should be doing in each area. Mix wet-zone and dry-zone materials and you shorten the life of the whole bathroom, which is why it shows up so often in low-quality renovations. For the full breakdown, read our Ultimate Bathroom Design and Layout Guide.
Ventilation: A Code Requirement, Not a Nice Feature
Kitchens deal with cooking moisture. Bathrooms deal with steam, humidity and condensation every morning, sometimes twice a day. Without a correctly sized and correctly installed exhaust fan, that moisture has nowhere to go. It settles on walls, seeps into grout and collects in wall cavities. Then mould follows. The Ontario Building Code therefore requires mechanical ventilation in bathrooms without operable windows, and even bathrooms with windows often need supplemental ventilation to meet current code.
Just as importantly, the fan has to vent outside the building rather than into the attic. Confirm that detail with your contractor, because attic-vented fans turn up far more often than you would expect in older Ontario homes. We cover CFM ratings, timer switches, humidity sensors and full code requirements in our Lighting and Ventilation Guide.
Worried about what is hiding behind your tile?
Soft spots in the floor, dark grout lines, peeling paint and a fan that never clears the mirror all point the same way. We inspect before we quote, so you learn what you are dealing with before you commit to a budget.
Timeline and Permits: What to Know Before You Start
Do You Need a Permit for Your Bathroom Renovation in Ontario?
It depends entirely on what you change. Here is the simple split.
You usually do NOT need a permit to
- Replace vanity cabinets without moving plumbing
- Retile shower walls
- Swap faucets or a showerhead
- Paint
- Fit a new mirror, hardware or accessories
You DO need a permit to
- Move a toilet, shower drain or sink drain
- Add a new bathroom
- Change a structural wall
- Run new electrical circuits
- Relocate plumbing lines
Unpermitted work creates real problems when you sell, because buyers and home inspectors look for exactly this. Under the Ontario Building Code, moving a drain even a few inches counts as a permit-worthy plumbing change. When in doubt, call your local building department before anyone starts.
How Long Does a Bathroom Renovation Take?
- Cosmetic refresh: 3 to 7 days
- Mid-range renovation: 2 to 4 weeks
- Full gut renovation: 4 to 8 weeks
- Permit processing on top: typically 2 to 4 weeks before work starts, depending on municipality
For a full breakdown of what drives bathroom renovation timelines and how permit requirements differ across GTA municipalities, read our complete Timeline and Permit Guide.
Hiring the Right Contractor for Your Bathroom Renovation
Bathrooms stay small in square footage yet stack up in trades. Plumbing, electrical, tile, waterproofing and finishing all land in one tight space. Your contractor has to coordinate every one of them cleanly, and in Ontario they must carry a licence and insurance. No exceptions.
The January 2026 GTA industry report said it plainly: poor contractor selection sends more bathroom renovations over budget and over schedule than anything else. Not materials. Not permits. The contractor.
So screen for these five things.
- Licensed and insured, and willing to show you proof
- Past work you can actually see, whether in photos or a finished project you visit
- Clear itemized quotes rather than a round number with no breakdown
- References you can call
- Consistent reviews on Google and Houzz
Want to go deeper before you interview anyone? Read how to choose the right renovation contractor in the GTA, then take our list of 21 questions to ask your contractor into the meeting. Before you sign anything, check what your renovation contract should include and which paperwork a GTA contractor should hold.
Put us through your own checklist
Everything above describes how we already work. We carry a licence and insurance, we quote line by line, we pull the permits, we coordinate every trade, and we will explain our waterproofing system in detail before you sign anything. Ask us the hard questions.
Also Planning a Kitchen Renovation?
We built the same step-by-step guide for kitchens, covering scope, budget, stages, permits and hiring. Read our Complete Kitchen Renovation Guide to get oriented on that side of your project.
Where to Go Next: Your Bathroom Renovation Reading Map
This guide orients you. Every topic below goes deeper. So pick whichever one matches where you stand in your planning right now.
Budget Planning
Bathroom Renovation Cost Guide 2026
Detailed cost ranges by scope, GTA municipality breakdowns, and what actually pushes prices up.
Layout and Design
The Ultimate Bathroom Design and Layout Guide
Wet zones, dry zones, fixture clearances, traffic flow, and how to make a small bathroom feel larger.
Small Spaces
Small Bathroom Remodel Guide
Tactics for bathrooms under 50 square feet: layout tricks, storage and fixture choices that work.
Surfaces
Countertops and Tile Guide
Tile types, grout selection, waterproof options, and how to choose what goes where.
Waterproofing
Underfoot and Waterproofing Guide
Membrane systems, drain sealing, and what proper shower waterproofing actually looks like.
Ventilation
Lighting and Ventilation Guide
CFM ratings, code requirements, humidity sensors, and where exhaust actually needs to vent.
Materials
Kitchen and Bathroom Materials Guide
How to compare every material choice before you buy: tile, countertop, vanity and flooring.
Hiring
How to Choose a GTA Contractor
General contractor, individual trades or design-build, and which one suits your project.
Style
Bathroom Design Styles and Trends 2026
Palettes, finishes and the looks GTA homeowners are choosing this year.
Bathroom Renovation FAQ
How much does a bathroom renovation cost in Ontario in 2026?
Most Ontario homeowners spend $9,000 to $16,000 on a mid-range bathroom renovation, according to HomeStars 2026 data. Full renovations in Toronto and the GTA typically run $15,000 to $18,000, cosmetic updates come in under $8,000, and luxury or large bathrooms reach $25,000 to $40,000 and beyond. Moving plumbing drives the biggest swing, since it alone adds $3,000 to $8,000.
Do I need a permit for a bathroom renovation in Ontario?
You need one as soon as you move plumbing, add a bathroom, change electrical circuits or alter structure. You generally do not for cosmetic work. Replacing a vanity in the same spot, retiling, painting and swapping fixtures without touching the plumbing all sit outside permit requirements. Bear in mind that unpermitted plumbing and electrical work can affect both your home insurance and your ability to sell later.
How long does a bathroom renovation take?
A cosmetic refresh takes 3 to 7 days, a mid-range renovation 2 to 4 weeks, and a full gut 4 to 8 weeks. Add 2 to 4 weeks upfront when permits apply. Material delivery delays and hidden issues found during demolition, such as old plumbing or rotted subfloor, stretch timelines further, so build in a buffer from the start.
Is waterproofing really necessary in a bathroom renovation?
Yes, always, in any renovation that retiles or rebuilds the shower or tub surround. A membrane behind the tile in wet zones stops water reaching the wall structure. Skip it and water eventually passes through grout and caulk joints, which leaves you with rotted framing, black mould and structural repairs costing far more than the waterproofing would have.
What is the difference between a wet zone and a dry zone in a bathroom?
Wet zones take direct or regular water contact and need waterproof backer, a membrane and wet-rated tile. Dry zones do not. Wet zones cover the shower, tub surround and area around the toilet. Dry zones cover the vanity area, storage walls and general floor beyond the fixtures, where material selection stays more flexible. Using the wrong materials in a wet zone ranks among the most common mistakes in DIY and low-quality renovations.
How important is bathroom ventilation?
Critical, and the Ontario Building Code requires it in bathrooms without operable windows. A correctly sized fan vented to the exterior pulls moisture out before it settles on surfaces and collects in wall cavities. Without it, mould develops faster, grout deteriorates sooner and paint peels early. Always confirm the fan vents outside the building rather than into the attic.
Can I save money by keeping my existing plumbing layout?
Yes, and it is usually the single largest saving available to you. Keeping the toilet, sink and shower drain in place avoids rough-in plumbing costs and sidesteps some permits entirely. Homeowners who update finishes and fixtures without changing the layout commonly save 20 to 35 percent. Ask the question before you commit to a new floor plan.
What should I look for when hiring a bathroom renovation contractor in Ontario?
Licence, insurance, visible past work, itemized written quotes and consistent reviews. Walk away from anyone who gives a vague single-number quote, dodges permit questions, or cannot explain their waterproofing method. Collect at least three quotes and compare them on scope and clarity rather than price alone. Our guide on comparing renovation quotes shows you how.
What are the biggest bathroom renovation mistakes Ontario homeowners make?
Rushing waterproofing, skipping permits, choosing a contractor on price, ignoring permit lead times and never checking where the fan vents. Hidden problems found during demolition, including rotted subfloor, old galvanized plumbing and insufficient venting, catch people off guard too. Therefore budget a 10 to 15 percent contingency on any mid-range or full renovation. Our renovation mistakes and myths guide covers more of them.
Does a bathroom renovation increase home value in Ontario?
Yes. Bathroom renovations consistently rank among the top three home upgrades for return on investment in Canada. Local GTA realtors put the resale lift from a well-executed renovation at 5 to 10 percent. The return climbs when the work is properly permitted, uses quality materials and matches the home’s overall price range. A luxury renovation in a mid-range home recovers noticeably less.
Ready to Start Your Bathroom Renovation in the GTA?
Smart Renovations works with homeowners across the Greater Toronto Area on bathroom and kitchen renovations of every scope. We handle permits, trades coordination and project management, so you never chase anyone down.
Free, no-pressure quote. Itemized line by line, with nothing hidden.
Licensed and insured. Building in the GTA since 2017.
Permits included. We apply, schedule and meet the inspectors.
Two GTA offices. Visit us in Richmond Hill or Woodbridge.
Visit our Richmond Hill office or our Woodbridge office, or browse completed projects on Houzz.
Disclaimer: This guide draws on industry research and publicly available data from sources including HomeStars, Statistics Canada and the Ontario Building Code, alongside our own experience working with homeowners across the GTA. Cost ranges and timelines are estimates, and your specific project, location and contractor will change them. Nothing here constitutes professional legal or engineering advice. For questions specific to your project or municipality, consult your local building department or contact us directly.
