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 San Mateo, CA | San Mateo Construction
We provide independent Toto service across San Mateo, including Foster City Toto service, covering Drake, Ultramax, Aquia, and Washlet lines. The one thing that makes our Toto work here different is that we understand how San Mateo’s coastal moisture, shifting clay soils, and older cast-iron drain systems create failures most flatland contractors never see. Call (855) 901-7266 for a free estimate on any Toto installation, repair, or full bathroom remodel.
Why San Mateo Residents Choose Us for Toto Service
Our crew has installed and serviced Toto toilets, bidet seats, and Washlet systems across San Mateo’s housing stock for years, including Belmont Toto service. We know the specific supply-line, wax-ring, and fill-valve quirks that come with the brand’s pressure-assisted and gravity-flush lines. That hands-on familiarity matters when you’re dealing with a Toto Drake that’s been slowly leaking under a 1940s tile floor or a Washlet that corroded from marine air.
Noel Carrington, our owner, grew up in the Baywood neighborhood of San Mateo and has spent the better part of three decades working residential and light commercial jobs across San Mateo County. He’s the one who insists on OEM Toto parts when the toilet body is sound, because he’s seen too many generic fill valves fail within a year. We are an independent construction and remodel shop, not a Toto dealer or authorized service center. That means we have no incentive to push a replacement when a $40 OEM fill valve fixes the problem.
Styles & brands we work with
Common Toto Construction Problems We Solve in San Mateo
- Wax-ring and flange seal failures. In pre-war San Mateo bathrooms, cast-iron drains have shifted over decades, cracking flanges and letting wax rings degrade. Water seeps under tile floors, and homeowners don’t notice until the grout darkens or the floor feels soft. We pull the toilet, assess the flange, and set a new Toto OEM wax ring with stainless closet bolts.
- Electronic Washlet control board and seat sensor corrosion. San Mateo sits in a coastal fog belt, and persistent marine moisture works its way into poorly ventilated baths, especially north-facing remodeled ones. Washlet control boards and seat sensors corrode. Intermittent power loss, settings that reset, or a heated seat that won’t stay warm are typical. We check the board, the seat harness, and the ventilation before recommending a board-level repair or a seat replacement.
- Fill-valve and flush-tower wear after kitchen remodels. When we re-route supply lines during a San Mateo kitchen remodel, we often find debris from old galvanized lines clogging Toto inlet screens. EcoPower-equipped toilets are particularly sensitive. A Toto that refills slowly or runs constantly usually has a clogged fill valve, a worn flush tower gasket, or both.
- Tank-to-bowl gasket failure and bolt corrosion on Ultramax one-piece units. Hard-water scale from San Mateo’s municipal supply builds up over decades, and on Toto Ultramax II one-piece toilets, that scale eats at the internal gasket between tank and bowl. The first symptom is water seeping down the back of the bowl. Bolts corrode too. We replace the gasket and bolts, then test through several flush cycles.
- Drain flange movement on hillside lots. This one’s specific to San Mateo. Homes west of El Camino Real sit on expansive clay, and wet-season water tables cause real movement. A Toto that rocks slightly at the base or leaks around the floor bolts often has a closet bend that moved out of level. The fix is rarely just a new wax ring.
Toto Service in San Mateo: What Local Conditions Mean for Your Equipment
San Mateo’s hillside lots west of El Camino Real sit on expansive clay that shifts with the wet-season water table. Any bathroom remodel touching a Toto toilet’s drain flange here often requires re-leveling the closet bend and adding a flexible coupling. Work that flatland tract homes near the Bay rarely need. We’ve done this enough times in neighborhoods like Baywood, Aragon, and the Castilian Way hills, plus Toto repair in Hillsborough, to know that a Toto leaking at the base in these areas is rarely just a wax ring problem. The flange itself has usually moved.
On a 1940s bungalow off Castilian Way in the hills west of El Camino, our crew pulled a Toto Drake to install a new walk-in shower and found the cast-iron closet flange had cracked from clay-soil movement, letting the wax ring leak into the subfloor. We replaced the flange with a PVC repair coupling, set a new Toto OEM wax ring and closet bolts, and re-tiled the bath floor. No callbacks through the next rainy season. That’s the difference between treating the symptom and treating what San Mateo’s ground actually does to plumbing.
Toto Models & Products We Service in San Mateo
We service every Toto line commonly found in San Mateo homes: the Drake two-piece gravity-flush series, the Ultramax II one-piece high-efficiency line, the Aquia dual-flush, and the EcoPower and Washlet electronic seats, including the older S300e and S550e models. For parts, we source OEM Toto fill valves, flush towers, wax rings, and Washlet seat assemblies. Generic aftermarket substitutes rarely work well with Toto’s proprietary flush mechanisms, so we don’t use them.
That said, we’re honest about the repair-versus-replace line. If a bowl, tank, or electronic seat has board-level failure beyond a $200 to $300 part fix, we recommend replacement rather than chasing obsolete Toto electronics. For what we keep on hand for faster turnaround in San Mateo, we stock common Toto fill valves, flush towers, and wax rings in our service vehicles, so a routine repair often happens the same day. See our full Toto sales & service approach for more detail.
See the difference
Before
After
Before
After
Before
AfterToto Service Pricing in San Mateo
What a Toto repair or install costs in San Mateo depends on two things: the specific failure and whether you’re doing a standalone fix or folding the work into a larger remodel. Here are the current market ranges for the bathroom work we handle most.
| Service | Price Range |
|---|---|
| Bathroom Remodel | $9,000 – $28,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Tile & Flooring (per bathroom) | $800 – $2,500 |
| Bathroom Vanity Installation | $800 – $3,000 |
A standalone Toto wax ring replacement or fill valve swap typically falls in the low hundreds. What drives cost higher is what we find underneath: a cracked flange on a hillside home, subfloor rot from a slow leak, or a corroded Washlet board. Our estimates include a written line-item breakdown so you know exactly what’s hardware, what’s labor, and what’s optional. Call (855) 901-7266 and we’ll walk the project with you.
Serving San Mateo, CA — Our Local Coverage Area
We’re a General Contractor – San Mateo based in the 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 – Toto Construction in San Mateo
My Toto Washlet keeps losing its settings after a power blip. Is that a San Mateo humidity issue or a board failure?
It’s usually one or the other, and we can tell which within the first few minutes of checking the unit. San Mateo’s marine moisture accelerates corrosion on Washlet control boards and seat sensors, especially in north-facing bathrooms with weak ventilation. If the board shows green corrosion or the seat sensor is pitted, it’s a board-level fix. If everything is clean and the settings still drop, the issue is more likely a failing power supply or a seat harness connection. Call (855) 901-7266 for an exact diagnosis. Estimates are free.
Can you replace a Toto toilet’s wax ring during a tile floor remodel without moving the drain?
In most cases, yes, the toilet gets pulled, the flange is inspected, a new Toto OEM wax ring goes down, and the toilet is reset over the existing drain. The exception is San Mateo hillside homes where the flange or closet bend has shifted. If the flange is cracked or out of level, we re-level or replace it before the new tile goes down so you don’t get a leak through the new floor.
My Toto Ultramax II runs intermittently. Is it the fill valve or the flush tower?
On the Ultramax II, intermittent running is almost always a worn flush tower gasket or a fill valve inlet screen clogged with debris from older galvanized supply lines. We check both, because hard-water scale in San Mateo’s municipal supply tends to affect both at once. If the toilet body is sound, we replace the failed OEM parts rather than the entire unit.
Do you install Toto toilets in ADU or garage-conversion bathrooms where the drain is new?
Yes, we handle Toto installs on new drain rough-ins as part of our ADU and garage conversion work in San Mateo. New construction means we can set the flange at the correct height for the finished floor, which eliminates the most common leak point from day one. We install the full Toto line, including Drake, Aquia dual-flush, and Washlet-equipped units.
What Toto toilet models do you recommend for a small San Mateo bathroom remodel?
For tight San Mateo bathrooms, the Toto Drake two-piece is the most forgiving, and the Aquia dual-flush’s compact bowl footprint works well in narrow spaces. If you want a one-piece look, the Ultramax II is our go-to, but it’s wider and needs a little more clearance. We’ll measure your rough-in and recommend the model that fits. Call (855) 901-7266 for an exact quote. Estimates are free.
Service Areas Near San Mateo
We provide Toto service throughout San Mateo and the surrounding communities. That includes the hills west of El Camino, the eastern flats, and the neighborhoods around 25th Avenue. We also cover Toto service in Burlingame and Toto service in Highlands-Baywood Park, plus Foster City, Hillsborough, and Belmont. See our San Mateo service area for details.
Book Your Toto Service in San Mateo Today
If your Toto toilet is leaking, running, or its Washlet seat is acting up, call (855) 901-7266 to schedule your free estimate. We’ll diagnose the problem, tell you what it costs to fix, and get it done right the first time.
Written by Noel Carrington, Owner at San Mateo Construction. “Tell me what you actually need, and we’ll figure out the right way to build it.”