Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Bathroom Remodeling Across Ontario
Bathroom remodeling in Ontario, CA typically runs $9,000 – $28,000 for a full gut-and-rebuild, while smaller projects like a tub-to-shower conversion land between $3,500 – $10,000. That’s the honest range, and we put it in writing before we pull a single permit. Penhallow Remodeling serves every Ontario neighborhood from the Model Colony core to the Creekside and Archibald Ranch tracts, and you can reach a live person anytime at (936) 259-2607 to schedule your free estimate.
Ontario’s building department is one of the busiest in San Bernardino County, which means local remodeling requires a level of sequencing discipline that out-of-area contractors often learn the hard way. We plan around it from day one, so your project doesn’t stall waiting on an inspection that could have been scheduled weeks earlier.
Why Penhallow Remodeling Is Ontario’s Preferred Bathroom Remodeling Company
Ontario homeowners call us because the number we quote is the number they pay. That’s not marketing language. It’s the 365-Day Done Right Promise, and it’s written into every project we scope. If something fails inside that year, we come back at no charge. No service call fee, no re-inspection fee, no argument.
Trevor Nash leads our Ontario projects, and every crew member who walks through your door is background-checked and uniformed. You’ll know exactly who’s in your home, when they’ll arrive, and what they’re doing that day. We’ve worked in homes off Vineyard Avenue, along the Euclid corridor, and up in the newer developments near Ontario Ranch, so we understand what this city’s housing stock actually requires.
Our Bathroom Remodeling team carries the same standard into every hall bath, primary suite, and converted tub space. Written price first. Defined arrival window. Clean job site at the end of every day. The Kingswell Way has worked that way since 2004.
Bathroom Renovation in Ontario
Bathroom Renovation in an Ontario home goes deeper than swapping fixtures. It means opening walls that were framed in the 1950s, checking supply lines that may still be galvanized steel, and waterproofing for a bathroom that has to handle Inland Empire heat and hard water. A full bathroom renovation in Ontario typically runs $9,000 – $28,000 depending on layout changes, material selections, and what we find behind the tile.
Because Ontario’s building and safety department is one of the busiest permitting offices in San Bernardino County, bathroom remodels here often sit two to three weeks waiting on rough-in and final inspection sign-off. We sequence phased inspection holds into the tile and waterproofing stages instead of calling for everything at the end. That keeps your project moving while the city works through its queue.
Full Gut Renovations in Older Ontario Homes
When we pull a 1950s ranch bathroom down to the studs, we’re looking at two things before we quote: the supply plumbing and the subfloor. Galvanized lines corrode from the inside out, and original 2×4 framing wasn’t built for modern tile deflection standards. We address both in the initial written scope, not as a surprise change order after demo day.
Permitted Rough-In and Waterproofing
In Ontario, a permitted bathroom renovation means the rough-in inspection happens before the backer board goes up and the waterproofing gets signed off before tile sets. That sequence is non-negotiable if you want the job done to code. It also means we coordinate with the city’s inspection calendar from the first week, not the tenth.
Small Bathroom Remodel in Ontario
A Small Bathroom Remodel in Ontario focuses on a hall bath or guest bath without moving walls or expanding the footprint. Most run $5,000 – $12,000, which covers new fixtures, a new tub or shower pan, fresh tile, a vanity, and all the waterproofing behind the scenes. It’s the most common project we scope in older Ontario bungalows and mid-century ranches where space is tight and the original layout still works.
What it doesn’t cover is buried plumbing failure. On a 1950s ranch off Euclid Avenue near the Model Colony core, our crew opened a hall bath and found galvanized supply lines feeding a cast-iron drain, so the scope of work grew into a full re-plumb behind the wet wall before any backer board went up. We reset the subfloor over the original framing, pulled permits for the new rough-in, and finished with a Kohler tub and Moen valve. The homeowner got a written change order before we touched a single line.
Tile, Fixture, and Vanity Refresh
When the bones are sound, a small bath remodel is mostly a finish-level job. New tile over properly prepped substrate (the moisture-resistant layer behind your tile), a new vanity with solid plywood construction, and fixtures from Kohler or Moen. We stock common parts locally for Ontario customers, which shortens lead times when a faucet or drain assembly arrives wrong from the supplier.
Waterproofing on a Compressed Draw
The failure we see most in Ontario small bath remodels is waterproofing rushed to meet a deadline. If the inspection backlog pushes your rough-in two weeks out, the wrong contractor tiles anyway and hopes nobody notices. We don’t. Your warranty and your walls both depend on the membrane being right before the first tile goes up.
Trusted Brands We Service in Ontario
We install materials from brands that carry their own warranties alongside our 365-Day Done Right Promise. In Ontario bathrooms, that means Cambria quartz countertops, Kohler and Moen fixtures, and KraftMaid or Wellborn cabinetry. Some Ontario homeowners also ask about Abodu and Cover for larger property additions, but for dedicated bathroom work we stick with the product lines we know will hold up under hard water and 105-degree summers. We source through recognized trade suppliers rather than big-box overflow, so what we quote is what gets installed, down to the brand name on the valve.
Common Bathroom Remodeling Problems We See in Ontario Homes
- Galvanized supply lines tiled over without a re-plumb. Pre-WWII and mid-century Ontario homes often still have original steel supply pipes. If a contractor tiles over them without checking, a pinhole leak resurfaces six months after the punch list closes. We pressure-test every line before we close a wall.
- Waterproofing covered before inspection sign-off. Ontario’s two-to-three-week inspection backlog means the rough-in can sit exposed longer than a contractor planned. Some rush it and get the membrane buried before the city signs off. Then the wall has to come open again. We schedule inspections in phases so that never happens.
- Undersized exhaust and missing insulation. Mid-century ranches were built for mild coastal air, not Inland Empire summers that regularly exceed 105°F. A remodel that leaves the original exhaust fan and skips added attic insulation fails Title 24 energy code and traps moisture in the wall cavity.
- Post-and-pier foundations shifting under tile. Older Ontario bungalows near the historic downtown sit on post-and-pier foundations over expansive clay soil. That movement cracks tile and grout if the subfloor isn’t reinforced before installation. We check deflection and leveling before we set anything.
Pricing for Bathroom Remodeling in Ontario, CA
Here’s what you can expect to pay for bathroom work in Ontario right now. These ranges reflect current material costs and the local labor market.
| Project | Ontario Price Range |
|---|---|
| Bathroom Remodel | $9,000 – $28,000 |
| Small Bathroom Remodel | $5,000 – $12,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Bathroom Vanity Installation | $800 – $3,000 |
A $9,000 bathroom remodel in Ontario is a finish-level refresh in a small space: new tub, new tile, new vanity, no layout change. A $28,000 remodel moves walls, re-plumbs the wet wall, relocates drains, upgrades the ventilation for Title 24 compliance, and installs high-end surfaces like Cambria quartz or a frameless glass enclosure. The price difference is scope, not markup. Call (936) 259-2607 for a written line-item quote before any work starts. Estimates are free, and the number won’t change once the permit is pulled.
We Also Serve Cities Near Ontario
Beyond Ontario, our crews cover Montclair, Claremont, Upland, and Rancho Cucamonga on the same written-pricing and 365-day guarantee basis. If you’re on a border street, call and we’ll confirm which schedule applies to your address. The Kingswell standard doesn’t change when you cross a city line. Reach us at (936) 259-2607.
Serving Ontario, CA - Our Local Coverage Area
We’re based in the Ontario area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Bathroom Remodeling in Ontario
A typical bathroom remodel in Ontario takes four to seven weeks from demo to final inspection, depending on scope and the city’s inspection calendar. Ontario’s building department regularly runs two to three weeks out on rough-in and final sign-off slots, so we sequence phased inspections into the schedule rather than waiting until everything is finished to call for sign-off. A small hall bath refresh may land at the shorter end; a full primary bath with layout changes and a re-plumb runs longer. Call (936) 259-2607 for a written timeline tied to your specific project.
Yes, and it should. Homes built in the 1950s along the Euclid Avenue corridor and across central Ontario frequently still have galvanized steel supply lines and cast-iron drains. If we open your wall and find those, the scope expands to a full re-plumb before any backer board or tile goes up. That can add $2,000 – $6,000 depending on how many lines run through the wet wall. You’ll get a written change order before we touch a single pipe, not a surprise at final invoice.
Yes. Ontario requires permits for any bathroom remodel that changes plumbing, electrical, or structural framing. A finish-only refresh like swapping a vanity or replacing a fixture may not need one, but anything involving drain relocation, new supply lines, or wall changes does. We pull the permits, schedule the inspections, and pass them before the tile sets. No permit, no Kingswell Guarantee, no exceptions. Call (936) 259-2607 and we’ll tell you exactly what your project triggers.
The difference is scope and material weight. A $9,000 Ontario bathroom remodel keeps the existing footprint, replaces fixtures and tile with mid-range product, and doesn’t touch the wet wall. A $28,000 remodel moves walls, relocates the toilet or shower drain, re-plumbs galvanized lines, adds insulation and a larger exhaust fan to meet Title 24 for 105°F summers, and installs higher-end finishes like Cambria or Silestone countertops and a frameless glass enclosure. Labor for licensed plumbing and electrical work in Ontario drives the high end more than any material choice. Call (936) 259-2607 for a line-item quote so you see exactly where your budget goes.
Yes, and it’s one of our most common Ontario projects. A small hall bath remodel in a pre-WWII bungalow near the historic downtown or along the Model Colony streets runs $5,000 – $12,000 when the footprint stays put. We re-level the subfloor over the original post-and-pier foundation, upgrade the exhaust for current code, install a new tub or shower, and finish with a compact vanity that fits the original door swing. No addition walls, no new foundation work, no footprint creep. Call (936) 259-2607 for a written quote on your exact floor plan.
Get Your Written Bathroom Remodel Estimate in Ontario
If you live in Ontario and you’re tired of contractors who quote one number and invoice another, call Penhallow Remodeling at (936) 259-2607. We’ll walk your bathroom, give you a real line-item price in writing before any work starts, and back it with the 365-Day Done Right Promise. Trevor Nash and our Ontario crew answer the phone, show up in the window we gave you, and leave the job site cleaner than we found it. That’s the Kingswell Way, and it’s been working since 2004.
Written by Trevor Nash, Owner at Penhallow Remodeling, serving Ontario and the Inland Empire.