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 Foster City, CA | Moreno Valley Builders
We’re an independent Toto service provider handling installation, repair, and home remodeling in Foster City with full bathroom construction work across the area. The thing that sets our Toto work here apart: we understand that a running Drake or a leaking base on a Toto in this city is usually a slab-and-flange problem, not just a worn flapper. Homes in Foster City sit on engineered bay fill that settles unevenly, and that shifts the floor under your fixture.
We handle everything from a fill-valve swap to a complete bathroom remodel with Toto fixtures specified from the start. Call (877) 752-3154 for a free estimate, and we’ll take a look at what’s actually going on under and around your Toto.
Why Foster City Residents Choose Us for Toto Service
We’ve installed and serviced Toto’s residential line long enough to know how their fill valves, flush towers, and seat hinges actually fail, and how bay-area water and moisture accelerate that wear. Our owner, Noel Trevino, grew up in Sunnymead Ranch and has spent nearly three decades building and renovating homes. He picked up construction technology fundamentals at Riverside City College, and the hands-on framing and mechanical coursework stuck with him. If the details aren’t right on paper, they won’t be right in the wall.
We’re not a Toto-authorized shop, and that matters. Our recommendations come from what the fixture does in your Foster City bathroom, not a factory script. We carry genuine Toto OEM fill valves, flappers, gaskets, and Washlet components for anything that affects flush performance or electronics. For the full scope of Toto sales & service, we’re the crew that treats a toilet as part of the floor system it sits on.
Styles & brands we work with







Common Toto Construction Problems We Solve in Foster City
- Phantom-running Drake toilets. The Toto Drake’s fill valve and flapper wear out eventually, and the mineral-heavy bay-area water supply shortens that timeline. On a slab home in Foster City, the slow leak doesn’t announce itself the way it does on a second-floor wood-framed bath. You hear the water running, but you can’t see where it goes.
- Washlet and Neorest electronics quitting. Those control boards and seat sensors don’t love persistent marine moisture. Foster City bathrooms that vent poorly trap fog and damp air, and that intrusion finds its way into the electronics. We see dead boards more often here than in drier inland cities.
- Wax-ring and closet-flange leaks on original 1960s-80s fixtures. The slab settles. The toilet tilts. The wax ring loses its seal. A Toto that leaks at the base in Foster City is frequently a floor problem wearing a plumbing costume.
- Hard-water scale clogging Washlet spray nozzles. Bay-area supply water carries minerals, and those minerals build up inside the small orifices of a Washlet. Spray pressure drops. The seat still works, but the wash function gets weak, and that’s a service call.
- Rocking Toto toilets. When the slab creeps out of level under a townhome or older single-family home, the toilet rocks. Rocking breaks wax rings, stresses the flange bolts, and eventually cracks the porcelain at the base. We level the floor, reset the flange, and only then reset the Toto.
Toto Service in Foster City: What Local Conditions Mean for Your Equipment
Foster City is a planned community built on fill over bay mud, and that’s the defining fact for every Toto installation we touch here. The ground doesn’t just sit still. Bay mud compresses under decades of load, fill settles at slightly different rates, and slabs move fractions of an inch in ways that show up first at the toilet flange. A Toto that “ran fine for years” and now runs constantly or leaks at the base is often sitting on a floor that has crept out of level. We correct the subfloor before resetting the fixture, because a new flapper on a tilted toilet just buys you a few months.
On a 1970s townhome near the Foster City lagoon, our crew pulled a Toto Drake that kept phantom-running and found the closet flange sitting on a slab that had settled unevenly on the bay fill, tilting the toilet and stressing the wax ring. We leveled and reset the flange, installed a fresh OEM fill valve and flapper, and reset the Drake true. No more running water and no more base leak. That’s the kind of fix a parts-only service won’t catch.
Toto Models & Products We Service in Foster City
We work on the full residential Toto line you’re likely to have in a Foster City home or townhome: the Toto Drake two-piece (CST744 and CST776 variants), the Eco Ultramax one-piece, Toto Washlet electronic bidet seats, and the Neorest integrated smart toilet. The Drake is the most common fixture we service in this city, and the most common failure is the fill-valve-and-flapper wear that produces a running toilet on a slab you can’t easily inspect.
For parts, we use genuine Toto OEM components on anything sealed or electronic: fill valves, flappers, gaskets, Washlet boards, pumps, and spray assemblies. We’ll use quality aftermarket parts only for cosmetic or non-sealed trim. A Drake with a bad fill valve is a repair. A 25-year-old one-piece with a cracked tank, or a Neorest with a dead board and no parts path, is where we’ll talk honestly about replacement instead of pouring money into a lost cause.
See the difference
Before
After
Before
After
Before
AfterToto Service Pricing in Foster City
When Toto work is part of a larger bathroom project, your general contractor in Foster City will scope it like this:
| Project | Typical 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 |
What drives the cost in Foster City is what we find under the floor. If the slab has settled and the flange needs leveling, that’s prep work a simple toilet swap doesn’t include. We show you exactly what’s involved before we start. Call (877) 752-3154 for a free estimate, and we’ll put numbers to your specific situation.
Serving Foster City, CA — Our Local Coverage Area
We’re based in the Foster City area and know this community well, just as we do our Toto in Redwood Shores work. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Toto Construction in Foster City
A running Drake is almost always a worn fill valve or flapper that’s no longer sealing. In Foster City, the mineral-heavy bay-area water speeds up that wear, and since many homes here are slab-on-grade, the slow leak doesn’t show up on a ceiling below. We replace the fill valve and flapper with genuine Toto OEM parts and check the tank-to-bowl gasket at the same time. Call (877) 752-3154 and we’ll diagnose it properly.
It depends on the age and the part that failed. A dead control board on a newer Washlet is usually worth replacing with an OEM board. A Washlet that’s ten-plus years old with multiple failures might be better replaced. We’ll give you a straight answer on repair versus replace, based on what the seat actually costs to fix, not on a sales target. Estimates are free.
Yes. We spec the Neorest early in the Belmont Toto service style remodel so the electrical rough-in lands where the seat needs it. Foster City’s older townhomes often need a dedicated circuit added, and we coordinate that with the rest of the bathroom scope. One contractor, every phase, from rough-in to the final seat calibration.
In Foster City, a rocking Toto usually means the slab under the flange has settled. We pull the toilet, inspect the closet flange and surrounding floor, level the surface, reset the flange correctly, and install a fresh wax ring before resetting the fixture true. That sequence is the difference between a fix that lasts and one that leaks again in six months. Call (877) 752-3154 for an inspection.
Yes. Mineral scale builds up in the fill valve, the flapper seat, and especially the Washlet spray nozzle. Spray pressure drops, the valve doesn’t seat fully, and the toilet starts running. Regular descaling helps, but the fix may involve replacing the scaled components. We stock the OEM parts to make that repair quickly in Foster City.
Service Areas Near Foster City
We cover Foster City and the surrounding Peninsula neighborhoods, including Toto service in Highlands-Baywood Park and Toto service in San Mateo. Our service range extends through the Foster City service area and to nearby communities where slab settlement and marine moisture create the same conditions we see every day in Foster City.
Book Your Toto Service in Foster City Today
If your Toto is running, rocking, leaking, or the electronics quit, call us at (877) 752-3154. We’ll schedule a time that works for you and give you a straight answer on what it takes to fix it. Free estimates, done right the first time.
Written by Noel Trevino, Owner & General Contractor at Moreno Valley Builders, serving Foster City and the Bay Area.