Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable Bathroom Remodeling Across Ontario
Bathroom remodeling in Ontario, CA typically runs $9,000 – $28,000 for a full gut-and-rebuild, and most projects take two to four weeks depending on whether you’re moving plumbing or keeping the existing footprint. If you live off Euclid Avenue, in the historic downtown core, or in one of the newer northern Ontario neighborhoods, you’re dealing with a specific set of construction realities: slab foundations, older galvanized supply lines, and title 24 energy requirements that a contractor from Chino Hills or Claremont may not think twice about. We do. Penhallow Remodeling Riverside coordinates scheduling and dispatch from our Inland Empire office, and our crews serve Ontario homeowners directly. Call (341) 895-1170 for a written, line-item quote before any work begins. That’s not a promise we make. It’s how The Kingswell Way has operated since 2004.
Why Penhallow Remodeling Riverside Is Ontario’s Preferred Bathroom Remodeling Company
Ontario homeowners have been through it before. A contractor gives a verbal ballpark. The crew shows up late. The price changes after demo day. The grout cracks six weeks later and nobody answers the phone. That’s why our Bathroom Remodeling team puts a written price and a written 365-day guarantee in front of you before a single tile is pulled. If something fails inside that year, we come back and fix it at no charge. Free second visit. No service call fee. No re-inspection fee. It’s on paper, not a handshake.
Our technicians are background-checked and arrive in uniform, so you know exactly who’s walking into your home. Trevor Nash leads our team, and he holds every job to the Kingswell standard: say the price before the work, show up in the window we gave, leave the place cleaner than we found it. When an Ontario homeowner calls about a failing walk-in shower or a bathroom that hasn’t been touched since 1972, we don’t sell them a remodel. We walk the space, check the substrate, check the plumbing, and give them a real number. A live person answers the phone 24/7. Not a voicemail maze, not a callback window. You call, a person picks up.
Styles & brands we work with
Bathroom Remodeling Contractor in Ontario
A Bathroom Remodeling Contractor in Ontario has to understand what’s behind the walls before quoting a dollar figure. Many Ontario homes built between the 1950s and 1980s have stucco exteriors, slab foundations, and original galvanized plumbing that’s been quietly corroding for fifty years thanks to the region’s hard water. A full bathroom remodel here often means scoping a rough-in replacement to PEX before new fixtures go in, and evaluating whether any exterior wall you’re opening is unreinforced masonry that needs shear-wall consideration before the inspector walks through.
Permits and the Ontario Inspection Reality
Ontario’s building department enforces title 24 energy standards and seismic requirements specific to California’s inland valleys. If your bathroom remodel moves a shower to an exterior wall or adds a skylight, the plan check will catch it. We pull permits, schedule inspections, and keep the sign-off on record for your insurer. A compliant quote includes those line items. A cheap quote leaves them out and hopes you don’t ask.
The 365-Day Done Right Promise
Every Penhallow bathroom remodel in Ontario carries a written guarantee. If the shower pan cracks, the tile shifts, or a plumbing connection fails inside the first year, we return and fix it. No charge. No argument. That’s the promise, and it’s on every contract we write in Ontario.
Walk In Shower in Ontario
A Walk In Shower in Ontario has to be built for a slab foundation home, not a raised subfloor. That’s the difference between a shower that drains properly for twenty years and one that leaks into the slab after two. Curbless designs are popular with Ontario homeowners who want to age in place, but on a concrete slab, you need a recessed pan and a proper moisture barrier. Skip those and the Santa Ana season’s humidity swings will find every shortcut. We install walk-in showers from $4,500 – $12,000, with frameless glass enclosures, Kohler or Moen fixtures, and cement board substrate (the moisture-resistant layer behind your tile) on every job.
Frameless Glass and Aging-in-Place
Frameless glass enclosures open up a small Ontario bathroom visually and they’re easier to keep clean than tracked doors. For homeowners planning to stay in their Euclid Avenue bungalow into retirement, we recommend a low-profile threshold or true curbless entry with a properly recessed pan. The pitch matters. On a slab, the drain relocation has to be sloped correctly or you’ll be standing in water every morning.
Tub-to-Shower Conversion on a Slab
Converting a tub to a shower in Ontario usually runs $3,500 – $10,000. The wildcard is what’s under the tub. Older Ontario homes often have cast iron drain lines that need replacement during the conversion. We scope the line before we quote, so the number you see on paper is the number you pay. No change order after demo day.
Trusted Brands We Service in Ontario
We install Cambria quartz countertops, KraftMaid and Wellborn cabinetry, and Kohler and Moen fixtures in Ontario bathrooms. These aren’t off-brand substitutes. Cambria carries its own lifetime warranty alongside ours, which means two layers of protection on the countertop. For shower surrounds and tile substrates, we use James Hardie backer board rated for wet areas. We don’t stock every brand line in our Inland Empire warehouse, but we order direct from distributors weekly, so Ontario customers aren’t waiting five weeks on a special-order vanity. If it’s a recognized trade brand, we can source it and stand behind it.
See the difference
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After
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AfterCommon Bathroom Remodeling Problems We See in Ontario Homes
- Galvanized supply lines near failure. On a 1960s ranch near Euclid Avenue, our crew opened a bathroom wall to find original galvanized supply lines so corroded by hard water that a simple faucet replacement would have risked a blowout. We scoped the rough-in replacement to PEX, added a slab-on-grade drain relocation with proper slope, and kept the permit inspection sign-off on record for the homeowner’s insurer.
- Asbestos-containing mastic under 1950s linoleum. Ontario homes from the mid-century era often have asbestos in the old floor adhesive. A bid that doesn’t include an allowance for abatement testing and removal turns into a change order that blows the budget. We test before we quote.
- Unreinforced masonry on exterior bathroom walls. Older Ontario homes along Euclid Avenue and in the historic downtown core were built with unreinforced masonry. Opening an exterior wall for a shower relocation triggers seismic shear-wall requirements. A contractor from Pomona or Chino may not know to check. We do, and we build the retrofit into the original quote.
- Curbless shower moisture failures on slab foundations. Installing a curbless walk-in shower without a recessed pan and proper moisture barrier causes humidity damage to the surrounding flooring. In Ontario’s dry summers it can look fine, but heavy winter rains push moisture up through the slab and the failure shows up six months later. We build the pan correctly the first time.
Pricing for Bathroom Remodeling in Ontario, CA
A full bathroom remodel in Ontario runs $9,000 – $28,000. The spread is driven by a few things: whether you’re moving plumbing or keeping it where it is, whether the home has galvanized supply lines that need replacement, which cabinet line and countertop material you choose, and whether the project requires seismic shear-wall work on an exterior wall. Here’s what our Ontario customers actually pay:
| Service | Typical Price Range in Ontario |
|---|---|
| Full Bathroom Remodel | $9,000 – $28,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Shower Replacement | $3,000 – $8,500 |
| Bathroom Vanity Installation | $800 – $3,000 |
Every quote is written, line-item, and fixed. The number on the quote is the number on the invoice. Call (341) 895-1170 to schedule a free estimate. We’ll walk your Ontario bathroom, check the plumbing and the wall structure, and hand you a number you can hold us to.
We Also Serve Cities Near Ontario
Penhallow Remodeling Riverside serves Ontario and the surrounding Inland Empire communities, including Claremont, Chino Hills, Mira Loma, and Riverside. If you’re in one of those cities and need Bathroom Remodeling in Ontario-level care with the same written guarantee, call us. We schedule projects across the region and our crews know the local permitting offices, the inspectors, and the housing stock in each city.
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
If you relocate a shower to an exterior wall in Ontario and the remodel includes a new or enlarged window opening, the window must meet California building code wind-load requirements tied to the structure’s exposure category and the local wind zone. Ontario sits in a moderate wind zone, but Santa Ana gusts push the effective design pressure higher on exposed walls. A compliant quote should specify a window with a documented design pressure (DP) rating appropriate to the wall’s exposure, and the permit plans should include that rating. We pull plans, the plan checker confirms the rating, and the inspection sign-off keeps the compliance on record for your insurer. Call (341) 895-1170 for a free estimate on your Ontario shower relocation.
Yes. In Ontario, replacing a tub with a walk-in shower is a plumbing fixture change that requires a permit, and if you’re moving the drain location or altering any wall, you’re crossing into structural and possibly seismic territory. The Ontario building department enforces this. A contractor who tells you to skip the permit is asking you to risk a stop-work order, a failed inspection, and an insurance claim that gets denied because unpermitted work voids coverage. We pull permits on every tub-to-shower conversion in Ontario and keep the final sign-off on file for you. Call (341) 895-1170 and we’ll walk you through exactly what your project needs.
Title 24 energy standards apply to any new skylight you add during an Ontario bathroom remodel, requiring a maximum U-factor and solar heat gain coefficient that’s appropriate for California’s inland valley climate. Inland Empire skylights need to handle high summer heat gain without turning the bathroom into a sauna. A compliant quote lists the skylight’s performance ratings and includes the title 24 documentation with the permit application. A cheap quote skips the documentation and the plan checker rejects it. We handle title 24 compliance on every Ontario remodel that touches the building envelope. Call (341) 895-1170 for details on your project.
A compliant written quote for an Ontario bathroom remodel should include line items for permit fees, plan check, any title 24 documentation, abatement testing if the home was built before 1980, galvanized plumbing replacement if the supply lines are original, and shear-wall evaluation if an exterior wall is being opened. Cheap quotes leave those out, then hit you with change orders after demolition. Our quotes include every line item up front, in writing, and the number doesn’t change. Call (341) 895-1170 to schedule your free written estimate in Ontario.
Yes, but it requires a recessed pan. On a slab foundation home in Ontario, a true curbless walk-in shower means cutting into the concrete to recess the shower pan, which keeps the bathroom floor level while maintaining proper drainage slope. It adds labor to the project, typically pushing the total walk-in shower cost toward the upper end of the $4,500 – $12,000 range, but it’s the only way to get a curbless entry without a step. The alternative is a low-profile threshold. Either way, the moisture barrier and drain slope have to be correct on a slab or you’ll get water migration into the surrounding floor. Call (341) 895-1170 and we’ll scope your Ontario slab and give you a written number.
Call (341) 895-1170 today to schedule your free bathroom remodeling estimate in Ontario. You’ll get a written, line-item quote, a real arrival window, and a 365-day written guarantee. No pressure. Just a number you can plan around.
Written by Trevor Nash, Owner at Penhallow Remodeling Riverside, serving Ontario, CA homeowners and the surrounding Inland Empire communities.
