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Toto Construction in Pomona, CA | Gold Star Contractors
Gold Star Contractors provides independent Toto service across Pomona, including repairs, installations, and full bathroom remodels. What makes our Toto work here different is simple: we know how Pomona’s older plumbing and hard water behave inside these fixtures. We’re not a Toto dealer or authorized service center, but we’ve worked on their toilets and bidet seats in enough pre-1960 Pomona homes to know exactly what fails and why. Call (833) 382-8544 for a free estimate.

Why Pomona Residents Choose Us for Toto Service
Noel Carranza grew up watching older tract homes get renovated block by block in Anaheim’s Platinum Triangle, studied construction technology at Fullerton College, and spent years doing concrete, carpentry, and finish work before building this operation. That hands-on background is why we approach every Toto job in Pomona the same way: figure out what the plumbing is actually doing before touching the fixture. We spec the brand, manage the install, and stand behind the result.
We’re a full-scope general contractor, not a fixture-only shop. That matters when a Toto installation in Pomona turns into a tub-to-shower conversion, a galvanized repipe, a new vanity, or a full bathroom remodel. One contractor. Every system. No handoff gaps. For broader Toto project coverage, see our Toto sales & service overview. And our Pomona service area page explains exactly where we work locally.
Styles & brands we work with







Common Toto Construction Problems We Solve in Pomona
- Washlet electronic failures from hard water. Toto S550e and C-series bidet seats have control boards and pump assemblies that degrade when mineral scale from Pomona’s hard water builds up in the wand and internal lines. We see this constantly in 91766 and 91767 homes. Sometimes the board can be replaced; sometimes the seat is past practical service life and replacement is the honest call.
- Ultramax and Drake fill valve and flush tower wear. The tower-style flush valve in these toilets sticks or runs continuously, and it shows up faster where supply pressure swings. That’s a daily reality in Pomona’s older neighborhoods near downtown and the fairgrounds, where original galvanized lines deliver inconsistent pressure.
- Wax ring and closet flange breakdown at the floor. Pomona’s pier-and-beam and shallow-slab foundations shift seasonally with the Inland Empire heat. That movement breaks wax seals, lets sewer gas creep into bathroom framing, and rots the subfloor around the toilet base. We reset the flange properly during remodels, not just smear on a new wax ring and hope.
- Scale-clogged Toto faucet aerators and ceramic cartridges. Pomona’s water leaves mineral deposits that choke aerators and seize cartridges. When a Toto faucet starts dripping, it’s usually not the fixture’s fault – it’s scale or a failing supply connection behind the wall.
- Supply-line corrosion where galvanized meets new fixtures. This is the Pomona-specific problem we see most. New Toto fixtures connected to 1920s-1960s galvanized stubs corrode fast at the joint. We always check what’s behind the wall before installing anything.
Toto Service in Pomona: What Local Conditions Mean for Your Equipment
Here’s the thing most Toto pages never tell you: Pomona’s original galvanized and early copper supply lines in pre-1960 bungalows near downtown and the fairgrounds often deliver lower, inconsistent pressure that masks a failing Toto fill valve. A bidet seat or toilet that seems “weak” is frequently the plumbing behind it, not the fixture. We’ve opened walls in 91766 and 91767 homes where the galvanized stub was so corroded internally that a brand-new Toto Drake would have underperformed from day one. That’s why we check supply pressure and line condition before installing or repairing any Toto fixture in Pomona. On a Spanish-revival cottage off West Holt Avenue near the fairgrounds, our crew opened a 1950s bathroom to find original galvanized supply stubs and a failing Toto Ultramax II fill valve running continuously. We replaced the valve with a genuine Toto OEM unit, reset the closet flange and wax ring, and tied the fixture into new copper during the tub-to-shower conversion. The toilet has run clean and quiet since. That’s the difference between swapping a part and actually solving the problem.
Toto Models & Products We Service in Pomona
We work on the full Toto residential line: Ultramax II one-piece elongated toilets, the Drake two-piece series, Promenade and Clayton models, and the Washlet bidet seat range including the S550e and C-series. We also service Toto EcoPower touchless commercial fixtures for Pomona’s citrus-era commercial buildings and small retail spaces.
Our parts approach is consistent: genuine Toto OEM fill valves, flush towers, seat electronics, and cartridges wherever available. Vetted aftermarket parts only for non-critical accessories, never something cheap that risks a leak behind a finished wall. We stock common Toto parts locally so Pomona service calls don’t stall waiting on shipping.
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AfterToto Service Pricing in Pomona
Most Toto work in Pomona and nearby areas like Toto repair in Montclair falls into a few clear categories. A running toilet repair is usually a fill valve or flush tower replacement. A failed Washlet board is a bigger decision. A full bathroom rebuild includes the plumbing, the fixture, the tile, and everything behind the walls.
| Service | Price Range |
|---|---|
| Full Bathroom Remodeling | $9,000 – $28,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Bathroom Vanity Installation | $800 – $3,000 |
What drives cost in Pomona specifically is what’s behind the wall. If we open a bathroom in a 1940s bungalow and find galvanized stubs that need replacing, that adds scope. If the subfloor around the toilet has rotted from a failed wax ring, that adds scope too. Our estimates are free and written line by line, so you know exactly what you’re paying for before work starts. Call (833) 382-8544 for an exact quote.

Serving Pomona, CA — Our Local Coverage Area
We’re based in the Pomona area and also handle Toto in La Verne, so we know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Toto Construction in Pomona
Yes, but we check the supply line condition first. Galvanized pipes in pre-1960 Pomona homes often have internal corrosion that reduces pressure and sheds rust into new fixtures. We may recommend replacing the supply stub with copper or PEX before installing a Washlet, because the seat’s internal pump needs consistent pressure and clean water to operate. Call (833) 382-8544 and we’ll inspect what’s behind the wall before quoting the job.
Almost always the tower-style flush valve or the fill valve. Ultramax toilets use a tower flush valve that can stick slightly open when mineral scale builds up, or the fill valve can fail to shut off cleanly. In Pomona’s older 91766/91767 homes, pressure fluctuations from aging supply lines make this worse. A genuine Toto OEM valve replacement usually solves it same visit. Call (833) 382-8544 for a repair estimate.
Yes, we do this regularly in Pomona. The conversion includes the new shower pan and tile, but it’s also the right moment to address what’s behind the wall: galvanized supply stubs, rotted subfloor, and a closet flange that’s been failing for years. We coordinate all of it under one team, so your Toto toilet and any Toto shower fixtures get installed on solid plumbing.
It can, especially the S550e and C-series Washlet models. Mineral scale builds up in the wand, internal lines, and pump assembly, which eventually leads to electronic failure. A whole-home water softener helps long term, but if the seat is already malfunctioning, we’ll diagnose whether a descale and part replacement is worth it or if the seat has reached the end of its service life. Call (833) 382-8544 and we’ll give you an honest read.
We repair when the ceramic bowl and internal components are sound, because Toto fixtures are built to last and OEM parts are worth the investment. We recommend replacement when the bowl itself is damaged or a Washlet control board repair would cost close to a new seat. Either way, you’ll get our straight assessment, not a sales pitch. Call (833) 382-8544 for a free estimate.
Service Areas Near Pomona
We serve Pomona and the surrounding Inland Empire communities, including Corona, Norco, Eastvale, and Jurupa Valley. For neighbors west of here, see Toto service in Highgrove and Toto service in Bloomington. Our crews know these neighborhoods and the local building conditions that affect Toto fixture performance throughout the region.
Book Your Toto Service in Pomona Today
Whether it’s a running Ultramax, a failed Washlet, or a full bathroom remodel with Toto fixtures throughout, we’ll inspect what’s behind the wall and tell you exactly what’s needed, including for Los Serranos Toto service requests. Call (833) 382-8544 to schedule your free estimate. One call, done right – that’s the only way Noel Carranza knows how to run a job.
Written by Noel Carranza, Owner at Gold Star Contractors, serving Pomona since the company’s founding.