Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Toto Construction in Ontario, CA
We install, repair, and service Toto toilets and bidet seats throughout Ontario’s 91762, 91764, 91758, and 91798 ZIP codes. We’re an independent contractor, not a Toto authorized dealer, and what separates our Toto work in Ontario is that we know this city’s housing stock: half of it was built with cast-iron flanges and tight rough-ins that fight you when you drop in a modern fixture. If you’re dealing with a running Drake, a leaking base, or planning a bathroom remodel around a Toto Ultramax II, call (877) 373-9230 for a free estimate.
Why Ontario Residents Choose Us for Toto Service
We work on Toto toilets and fixtures every week in Ontario’s post-WWII tracts and newer master-planned builds, so we know the fill-valve, flapper, and wax-ring quirks of the brand’s most common residential lines. The Drake and Eco Drake are everywhere in Ontario because they’re durable, but they also fail in patterns specific to this city’s hard water and older plumbing. Noel Cardenas, our owner, grew up in Garden Grove and came through the construction trades program at Santiago Canyon College, and he’s spent years on residential and commercial builds across the Inland Empire. He’ll tell you the same thing we tell every Ontario customer: a Toto is a good fixture, but only if the flange under it is solid and the internals are genuine OEM. That’s the difference between a repair that holds and one that ghosts you a month later. We’re Toto sales & service done by a general contractor who understands the whole bathroom, not just the toilet.
Styles & brands we work with
- Kitchen remodeling
- Bathroom remodeling
- Home additions & ADU
- Roofing
- Windows & doors
- Driveway & pavers
- Fence
Common Toto Construction Problems We Solve in Ontario
- Slow refill and ghost flushing on the Drake and Eco Drake: Ontario’s inland water supply carries heavy mineral content, and that scale builds up on fill valves and aerator screens faster than most homeowners expect. A toilet that refills in 90 seconds instead of 30, or cycles on its own at 2 AM, is usually a calcium-crusted fill valve. We replace it with a genuine Toto OEM part, not a universal kit that sits slightly wrong and starts leaking in six months.
- Running toilets that won’t stop: The classic CST743/CST744 symptom. Flappers and fill valves degrade faster in Ontario’s hot, dry summers because the tank cycles more and the rubber dries out. A flapper that’s warped or a chain that’s stretched just enough to let water seep past will run your water bill up.
- Slow leaks at the toilet base: In Ontario’s older tract homes, the wax ring beneath the toilet has often been there since the Nixon administration. When it crumbles, water seeps out at the base and homeowners mistake it for condensation. Left alone, it rots the subfloor and the closet flange rusts out. We see this constantly in 91761 and 91762, where the original cast-iron flanges are still in place.
- Washlet bidet seat failures: Ontario’s summer humidity swings are hard on electronics. The Washlet pulls moisture into its control board and wand assembly, which leads to dead seats or weak spray that no amount of cleaning fixes. We diagnose the seat and replace the wand or board when needed, or upgrade you to a new Washlet that’s actually matched to your bathroom’s ventilation.
- Cracked bowls and tanks on aging fixtures: After 20-plus years of Ontario temperature swings and hard water, porcelain develops hairline cracks that leak and can’t be repaired. We’ll tell you honestly when replacement beats chasing parts, and we’ll steer you toward a Toto model that fits your existing rough-in without a full bathroom remodel.
Toto Service in Ontario: What Local Conditions Mean for Your Project
Ontario’s housing splits sharply between 1950s-60s tract homes in 91761/91762 with original cast-iron and tight toilet rough-ins, and newer master-planned subdivisions with larger bathrooms. That split drives almost every Toto service in Montclair and surrounding areas we make here. A Toto swap on an old tract home on Euclid Avenue or Vineyard Avenue often means correcting the flange and rough-in before the new fixture drops in, because those original flanges were set for smaller, older toilets and the cast iron is frequently rusted through. On a 1962 tract home in the 91762 core, our tech pulled a leaking Toto Drake and found the original wax ring had crumbled over a rusted cast-iron closet flange. We cut back the flange, reset it with a new Toto OEM wax ring and rebuilt fill valve, and the ghost-flush and base seep both stopped. That’s the difference between a handyman swapping a toilet and a contractor who knows what’s under the floor. In Ontario, the flange is usually the actual problem. A generic Toto page won’t tell you that. A generic Ontario page won’t either.
Toto Models & Products We Service in Ontario
We service the residential Toto lines you’re most likely to own in Ontario: the Drake (CST743 series two-piece), the Eco Drake (CST744), the Ultramax II one-piece, and the Washlet bidet seat family. Our parts approach is simple: we use genuine Toto OEM fill valves, flappers, and wax rings on Drake and Ultramax models because aftermarket kits frequently don’t seat correctly and cause repeat refill problems. When you’re planning a full bathroom remodel, we spec the Toto fixture that fits your rough-in and your water pressure the first time, so you’re not surprised mid-project. Every Toto installation we do is part of the same single-contract accountability we bring to every job across Ontario service area.
See the difference
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AfterToto Service Pricing in Ontario
Every Toto repair in Chino and Ontario job falls into one of two buckets: a repair on existing equipment, or a fixture swap as part of a larger bathroom remodel. The honest answer is that a cracked-bowl replacement or a Washlet control board are usually far cheaper than a full remodel, but when you’re already updating the space, that’s the right time to move a rough-in or fix a flange correctly. Here’s what our Toto-related construction work runs in Ontario:
| Service | Price Range |
|---|---|
| Full Bathroom Remodel | $9,000 – $28,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Bathroom Vanity Installation | $800 – $3,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Small Bathroom Remodel | $5,000 – $12,000 |
The final number depends on whether the flange is rusted, how far the rough-in has to move, and what’s behind the walls once we open them. Our free estimate gives you a written line-item quote, and we don’t do change orders on work we’ve already scoped. Call (877) 373-9230 to schedule yours.
Serving Ontario, CA - Our Local Coverage Area
We serve Ontario and nearby communities. Also see Toto in San Antonio Heights. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
FAQs – Toto Construction in Ontario
Usually it’s both, or one is failing and making the other work harder. In Ontario’s hard water, the fill valve gets scaled first and stops shutting off completely, which keeps water trickling past a flapper that’s also dried out from the hot, dry summers. We replace both with Toto OEM parts when we see this, because replacing one just means another service call in a few months. Call (877) 373-9230 and we’ll diagnose it on-site.
Sometimes, and that’s the honest answer. Older Ontario tract homes in 91761/91762 often have rough-ins set at 10 or 11 inches instead of the standard 12, and the cast-iron flange has been patched and bolted so many times it’s no longer level. We can usually move the rough-in or use an offset flange to make the Ultramax II work, but we’ll measure before we order anything. That’s the kind of check that prevents a brand-new toilet from sitting in your garage for two weeks.
We do, and we’ll size the seat to the toilet and the electrical rough-in before the walls close. Ontario bathrooms in older tract homes often lack a dedicated GFCI outlet near the toilet, and running an extension cord behind a toilet is neither safe nor code-compliant. We add the outlet during the remodel so the Washlet is installed the way Toto’s documentation actually requires. Get an estimate by calling (877) 373-9230.
Yes. Ontario’s water carries enough dissolved minerals that we see fill valves and aerator screens scaled to the point of failure within a few years, especially on Drake and Eco Drake models. The fix is genuine Toto OEM internals plus regular cleaning of the fill valve cap and screen. A whole-home softener helps everything, but most Ontario homeowners skip it until the plumbing starts acting up. For an exact quote on a fill valve rebuild or a softened-water setup, call (877) 373-9230.
It depends on whether the flange is still level and intact, and in Ontario’s older 91761/91762 tract homes, it often isn’t. Cast iron rusts from the inside out, and the bolt slots that held the old toilet may be rotted wide open. We’ll pull the fixture, inspect the flange, and give you a straight answer: either reset with a new Toto OEM wax ring and repair the flange, or replace the flange entirely before the new fixture goes in. Free estimates – call (877) 373-9230.
Service Areas Near Ontario
Along with Ontario, our Toto service covers nearby communities including Garden Grove, Corona, Midway City, Stanton, and Westminster. If you’re in Upland, see our Toto service in Upland page. For the high desert side of the valley, we also run Toto service in Phelan. No matter which side of the county you’re on, the same OEM parts and the same flange-first approach apply.
Book Your Toto Service in Ontario Today
A running Toto Drake or a leaking base won’t fix itself, and Ontario’s hard water only makes it worse. Call (877) 373-9230 for a free estimate, or to have one of our techs out this week. The material you pick today is the problem you solve, or the one you live with, ten years from now.
Written by Noel Cardenas, Owner at Garden Grove Contractors, serving Ontario and the Inland Empire with general contractor full-scope remodeling and Toto fixture service.