Custom Bathroom Design & Remodeling
Bathroom Renovation Services in Ontario: Custom Showers, Vanities & Waterproofing
A bathroom does not have to be large to make a difference. It is the first room many of us use in the morning and the last one at night, so small problems, like a cramped shower, poor lighting or a tub that never seems to dry, are noticed every day. If your bathroom feels dated, cold or hard to use, a well-planned renovation can change that. Proventa Construction provides complete bathroom renovation and remodeling services across Ontario, from the initial layout to the final tile sealing.
Whether you want to refresh a powder room, update an ensuite or turn a master bath into a spa-style retreat, we handle the design, the plumbing, the tile and the finishing ourselves. As a result, you are not chasing separate trades or wondering who is responsible if something goes wrong. We focus on the part that matters most in a bathroom, which is what you cannot see: proper waterproofing, sound framing and code-compliant plumbing and electrical work.
Showers, Tubs & Spa Features
From walk-in showers with frameless glass to freestanding soaking tubs, we design the part of the bathroom you use most. Spa-style extras, such as steam, body jets and soft lighting, can turn an ordinary routine into something you look forward to.
Vanities, Storage & Tile Work
Good storage keeps a bathroom calm and uncluttered. We help you choose vanities, mirrors, countertops and tile that suit your style, then install them with the precision that makes a finished room look right.
Waterproofing & Comfort Systems
Moisture is the main enemy of any bathroom. For that reason, we install complete waterproofing behind the tile, and we can add heated floors, better lighting and quiet ventilation to keep the room comfortable and dry.
Plumbing, Electrical & Accessibility
We handle new supply lines, drains, outlets and safety features, including barrier-free showers and grab bars. If your project involves structural changes or moved plumbing, we also take care of drawings and permits.
What Our Bathroom Renovations Include
Every bathroom is different, but these are the services homeowners ask for most often.
Custom Walk-In Showers
Frameless glass enclosures, linear drains, built-in niches, bench seating and multi-head rain systems. A shower that is planned around your space is more comfortable and far easier to clean.
Freestanding Bathtubs
A soaking tub can become the centrepiece of a larger bathroom. We make sure the floor can support the weight and that the plumbing is placed correctly.
Spa-Inspired Upgrades
Body jets, steam shower conversions and mood lighting add a touch of luxury. They need careful planning for ventilation and waterproofing, which is where an experienced contractor matters.
Vanities & Custom Cabinets
Choose wall-mounted or freestanding vanities, with mirrors and cabinetry designed around the way your household uses the room.
Quartz & Stone Countertops
Quartz and granite resist stains and stand up well to daily use. We pair them with undermount sinks for a clean look that is simple to wipe down.
Precision Tile Installation
Ceramic, porcelain, marble and mosaic tiles for floors, feature walls and shower surrounds. Straight lines, even grout and well-planned patterns make the difference between average and excellent.
Advanced Waterproofing
We waterproof the subfloor and shower walls with a complete membrane system. Done right, it protects your home from mould and moisture damage for many years.
Heated Flooring Systems
Electric radiant floor heating with a programmable thermostat takes the chill off tile on cold Ontario mornings, and it costs little to run.
Lighting & Ventilation
Recessed LED lights, vanity task lighting, accent strips and a quiet, efficient exhaust fan. Good ventilation also helps keep moisture from building up.
Plumbing & Electrical Work
Rough-in plumbing upgrades, new supply line routing, drain installation and code-compliant outlets, all done and inspected where required.
Accessibility Renovations
Barrier-free roll-in showers, curbless entries, grab bars and comfort-height toilets. These upgrades make a bathroom safer for seniors and family members with limited mobility.
Basement & Additional Bathrooms
We add new bathrooms in basements and additions, including rough-in work and the drawings needed for a permit.
How We Run a Bathroom Renovation
A bathroom project has many small steps that depend on each other. Here is how we keep them in order.
1. Consultation & Measurements
We visit your home, look at what works and what does not, and measure the space carefully. We also discuss your budget at this stage so the design stays realistic.
2. Design & Material Selection
We plan the layout, then help you choose fixtures, tile, vanity and finishes. If walls or plumbing are moving, our team prepares the architectural drawings and permit application as well.
3. Pricing & Scheduling
You receive a written scope of work, pricing and timeline before work starts. Because some fixtures and custom glass take time to arrive, we order them early.
4. Demolition, Rough-In & Waterproofing
After demolition, we handle framing, plumbing and electrical rough-ins. Waterproofing is installed next and checked before any tile goes up.
5. Tile, Finishing & Clean-Up
Finally, we install tile, fixtures, vanity, glass and lighting. A detailed walkthrough and a thorough clean-up finish the job.
What Affects the Cost of a Bathroom Renovation?
Understanding the main cost factors makes it easier to plan a realistic budget.
Size & Layout Changes
Keeping fixtures where they are costs less than relocating a toilet or shower drain. Moving plumbing may also mean opening the floor.
Tile & Material Choices
Large-format and natural stone tiles cost more to buy and to install. Simple patterns can keep the budget down without hurting the look.
Shower & Glass Features
Custom frameless glass, linear drains and rain systems add up. A good design puts the money where you will notice it most.
Hidden Conditions
Old bathrooms sometimes hide rotted subfloors, outdated pipes or past leaks. We recommend setting aside a contingency for these surprises.
Why Choose Proventa Construction for Your Bathroom?
Frequently Asked Questions: Bathroom Renovation
Straight answers to the questions homeowners ask us most often.
Timeline, Cost & Permits
How long does a bathroom renovation take?
A standard bathroom often takes a few weeks once work begins, although a larger ensuite or a project with layout changes takes longer. Waterproofing and tile also need time to cure, so rushing is not a good idea. We give you a schedule before we start.
How much does a bathroom renovation cost?
It depends on the size of the room, the materials you choose and how much plumbing or structural work is needed. A cosmetic update costs far less than a full remodel with a custom shower. After we see your bathroom and learn what you want, we can give you a realistic estimate.
Do I need a permit to renovate my bathroom?
Not always. Replacing fixtures and finishes in the same layout may not need a building permit. However, moving plumbing, altering walls or adding a new bathroom often does, and electrical work may require an Electrical Safety Authority permit. We check what applies to your project and handle the applications.
Design, Waterproofing & Materials
Why is waterproofing so important in a bathroom?
Tile and grout are not waterproof on their own. Water can pass through them and into the walls and floor, which leads to mould and rot. A proper waterproofing membrane under the tile prevents this, and it is the most important part of the job.
Can I convert my bathtub into a walk-in shower?
Usually, yes. We remove the tub, adjust the plumbing and drain and build a waterproofed shower in its place. It is a popular upgrade, especially for homeowners who rarely take baths or who want an easier-access shower.
Is heated flooring worth it?
For most people, yes. Electric radiant heating makes tile comfortable in winter and warms the room gently. It runs on a programmable thermostat, so it only works when you need it, and it is easiest to install during a renovation while the floor is open.
Which is better for a vanity top, quartz or granite?
Both perform well. Quartz is non-porous and needs no sealing, which suits a damp room. Granite has a natural look but should be sealed periodically. We can show you samples to help you decide.
Accessibility & Living at Home
Can you make my bathroom accessible for a family member?
Yes. Accessible bathrooms can include a curbless, roll-in shower, grab bars with proper wall blocking, a comfort-height toilet and wider doorways where possible. We plan the layout around the person who will use it, so it feels natural instead of clinical.
Can I use my bathroom during the renovation?
No, not the room being renovated. If it is your only bathroom, we can plan the schedule to keep the downtime as short as possible, and we suggest arranging an alternative for the duration of the work.
What happens if you find damage behind the walls?
It happens fairly often in older bathrooms. When it does, we stop, show you what we found and explain the options and costs. Nothing extra goes ahead until you approve it.
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Verified Customer Reviews
Proventa Construction transformed our unfinished basement in Oakville into a comfortable, modern living space. The… recessed lighting brightens the rooms, and the flooring, drywall and painting give everything a clean, finished look. We especially appreciate how well the layout works for our family. Very happy with our basement renovation.
We had a great experience with Proventa Construction for our basement finishing project. They helped us make better use… of the space with a welcoming recreation area, practical storage and modern lighting. The neat trim, smooth walls and attention to the smaller details made a big difference. Our basement finally feels like part of our home.
Proventa Construction Inc. transformed our outdated 1990s kitchen into a stunning open-concept dream space. They… removed a load-bearing wall, installed custom cabinetry, and fitted gorgeous quartz countertops. The project leadership was top-notch—they kept everything clean, organised, and strictly on schedule. The attention to detail on the tile backsplash and lighting upgrades made a huge difference. Highly recommended for any major kitchen remodel!
Really happy with how our basement turned out. Proventa Construction did a fantastic job transforming it into a… beautiful, fully finished legal basement with a modern island kitchen, stylish cabinets, and elegant countertops. The whole space looks amazing and feels like a separate home. Highly recommend Proventa Construction for legal basement renovations and home remodeling in the GTA!
We hired Proventa Construction to build a below-grade entrance for our basement apartment. The work included… excavation, concrete steps, retaining walls, and drainage. The team explained the process clearly and kept us updated throughout.
We recently hired Proventa Construction to renovate our kitchen, bathroom, and basement all at once. Honestly, taking… on three major spaces had us incredibly stressed, but the team made the entire process so much easier. They were straightforward with pricing, transparent about the timeline, and actually showed up when they said they would. The craftsmanship is excellent—the kitchen is beautiful and functional, the bathroom feels like a proper upgrade, and the basement went from a dusty storage zone to a bright space we actually use every day. There were a couple of minor material delays along the way, but they communicated immediately and sorted it out without dragging their feet. If you want a dependable crew in the Toronto area that does quality work and respects your home, I highly recommend them.
We recently hired Proventa Construction for a complete overhaul of both our kitchen and bathroom, and honestly, they… knocked it out of the park. From our very first meeting, the team felt more like good neighbors who genuinely cared about our house rather than just another contractor. They really listened to our vision (and our budget!) and turned what could have been a super stressful process into a really exciting project. The craftsmanship is top-tier. Our kitchen is now the ultimate gathering spot—functional, beautiful, and the custom finishes are just stunning. And the bathroom? It honestly feels like a boutique hotel spa now. What really stood out to us was their communication. They kept us in the loop every step of the way, showed up on time, and left the place spotless at the end of every work day. In true Canadian fashion, they were polite, professional, and just a real pleasure to have around. If you are looking to renovate and want a team you can actually trust to do an incredible job, look no further than Proventa. We couldn't be happier with how everything turned out. Thank you guys so much!
Proventa Construction did an excellent job finishing townhouse basement in Mississauga. The team provided honest… guidance, practical suggestions, and quality workmanship. Communication was clear throughout, and the finished basement feels comfortable and inviting. Highly recommend Proventa Construction for basement renovations in Mississauga.
We recently worked with Proventa Construction to renovate our basement, and they were incredible. They turned a dark,… unfinished space into a beautiful, bright, and comfortable extension of our home. From start to finish, the team was transparent, respectful, and genuinely cared about the quality of their work. If you're looking for trustworthy people who do amazing work, we highly recommend Proventa!
Honestly, we couldn't be happier with the job Proventa Construction did on our kitchen and basement! From day one, the… guys were super professional, completely reliable, and just all-around great people to have around the house. They turned our kitchen into an absolute dream and made the basement so cozy for the family. Their attention to detail is incredible, the pricing was totally fair with zero surprises, and they made the whole project completely stress-free. If you're looking to upgrade your place, we highly recommend them—they truly went above and beyond!

