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Toto Construction in Los Angeles, CA | Mason Remodeling
We provide independent Toto construction service across Los Angeles, including Bathroom Remodeling in Los Angeles built around Toto fixtures, Washlet bidet seat installation, and repair work on Toto Drake, Ultramax, and Aquia models. What makes our Toto work different here: we plan for this city’s hard water before we set the first tile. If you need a Toto toilet installed, a leaking Drake repaired, or a full bathroom rebuild with Toto fixtures, call (803) 680-2547 for a written, line-item estimate before any work starts.
Why Los Angeles Residents Choose Us for Toto Service

Most Los Angeles homes have at least one bathroom that’s older than the people living in it. When we open up a 1940s bathroom in West Adams or a 1970s condo bathroom in Mid-Wilshire, the Toto fixtures usually weren’t the original problem, but they’re often ignored until they fail. We’ve retrofitted and repaired Toto toilets and bidet seats across Los Angeles for years, so we know the exact Washlet connections, fill-valve quirks, and 1.28 GPF flush patterns that show up in this city. That’s the difference between a crew that has seen your exact situation and one that’s figuring it out on your dime.
Isaac Pruett, our owner, grew up in the Sylmar end of the San Fernando Valley and learned construction at Los Angeles Trade-Technical College. He’s spent nearly two decades remodeling bathrooms across Los Angeles, and he still checks the trim work on every job before he considers it done. We’re an independent remodeling crew, not authorized, sponsored, or endorsed by Toto. That means when we recommend a repair instead of a replacement, it’s because that’s what your bathroom actually needs, not because a manufacturer’s program tells us to push a new unit.
Styles & brands we work with







Common Toto Construction Problems We Solve in Los Angeles
- Toto Drake ghost-flushing: The 3-inch flapper and fill valve on Drake models (CST744 series) wear faster here than in most cities. Los Angeles municipal water carries a heavy mineral load, and those calcium deposits eat away at rubber and plastic internals. You’ll hear the toilet run for a few seconds at night, then stop. In a quiet house, that’s the sound of a flapper not seating. We replace it with a genuine Toto OEM flapper or a high-quality aftermarket unit if OEM stock is unavailable.
- Washlet electronics failing from scale: Toto Washlet S550e and similar bidet seats fail at the water inlet filter and solenoid when hard water deposits scale inside the unit. You get weak spray pressure or a unit that won’t power on at all. This is one of the most avoidable failures we see, and it’s almost always water quality, not the seat itself. We stock replacement inlet filters and can flush the solenoid when possible.
- Aquia dual-flush flush tower leaks: The Toto Aquia’s flush tower gasket develops slow leaks over time, and on older Los Angeles homes with copper or galvanized supply lines, the pressure cycling from older fixtures makes the wear worse. The symptom is usually water trickling into the bowl between flushes. Often a $15 gasket fixes it, and we’ll tell you that plainly instead of suggesting a new toilet.
- Base leaks from slab movement: Wax rings and closet flanges on Toto one-piece toilets crack when the slab under an older Los Angeles home shifts. This city sits on moving ground, and homes in neighborhoods like Leimert Park or Eagle Rock see more of it. The leak shows up as a soft floor near the toilet or an occasional sewer smell. We don’t just replace the wax ring; we check the flange for hairline cracks that’ll leak again in six months.
- Toto fill valves worn from hard-water mineral buildup: Toto fill valves have a diaphragm that hardens and fails as calcium deposits build up. You’ll notice weak refill pressure or a fill that takes forever. In Los Angeles, we see fill valves that look 15 years old after 5 years of service. A new fill valve is usually a 20-minute fix, and doing it before the valve fails completely prevents a midnight surprise.
Toto Service in Los Angeles: What Local Conditions Mean for Your Equipment
Los Angeles has some of the hardest municipal water in the country, and that calcium load is what kills Toto fill valves and Washlet solenoid filters here far sooner than in softer-water cities. The Los Angeles Department of Water and Power draws from sources like the Colorado River and the Owens Valley aqueduct, both of which pick up dissolved minerals along the way. That’s why a Toto Drake in a Silver Lake bungalow might need a fill valve replacement every 3 to 5 years, while the same toilet in Seattle or Portland could go a decade without one. When we’re doing a bathroom remodel in Los Angeles, we plan for it by adding an accessible quarter-turn shutoff behind the toilet, and when the client wants it, a whole-house or fixture-level softener loop so the new Toto fixtures are not fighting scale from day one. In a 1920s Spanish bungalow in Highland Park, a client’s Toto Ultramax II had a ghost-flush every 30 minutes and a corroded fill valve from years of hard LA water. Our tech replaced the OEM fill valve and 3-inch flapper, reset the tank-to-bowl gasket, and added a quarter-turn shutoff behind the toilet while we were remodeling the hall bath. The ghost-flush stopped the same day, and the new shutoff made future service a five-minute job instead of pulling the toilet. That shutoff was a $40 addition that changed the whole service equation for that homeowner.
Toto Models & Products We Service in Los Angeles
We work on the full range of residential Toto equipment you’re likely to have in a Los Angeles home. That includes Toto Drake (CST744 series) toilets, the most common toilet in LA remodels and flips; Toto Ultramax and Ultramax II one-piece models; Toto Aquia dual-flush toilets from the last 15 years; and Toto Washlet electronic bidet seats, including the S550e and similar models. Our parts approach is simple: we stock genuine Toto OEM flappers, fill valves, and Washlet inlet filters whenever they’re available, and we use high-quality aftermarket gaskets and supply lines only when OEM parts would delay a same-week repair. That’s the honest tradeoff, and we’ll tell you which part went in and why. We’re independent, so we’re not restricted to any manufacturer’s parts list or labor pricing. If a 15-year-old Toto Aquia needs a $15 tower gasket instead of a full replacement, that’s what we’ll tell you. We don’t push a new toilet when the existing bowl is sound.
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AfterToto Service Pricing in Los Angeles

What you’ll pay depends on whether we’re swapping one Toto fixture or rebuilding the whole bathroom around it. Here are the current ranges we quote in Los Angeles, with Toto fixtures included where noted:
| Service | Price Range |
|---|---|
| Full Bathroom Remodeling (Toto fixtures included) | $10,620 – $33,040 |
| Small Bathroom Remodel (single Toto toilet swap and tile) | $5,900 – $14,160 |
| Bathroom Vanity Installation | $945 – $3,540 |
| Walk-In Shower Installation | $5,310 – $14,160 |
| Tub-to-Shower Conversion | $4,130 – $11,800 |
What drives cost in Los Angeles: the age of your plumbing rough-in, whether we need to move drains or supply lines, and what tile and fixture level you choose. A free estimate from us means a written line-item quote with the numbers fixed before any work starts. No verbal ballparks that grow later. Call (803) 680-2547 to schedule yours.
Serving Los Angeles, CA - Our Local Coverage Area
We’re based in the Los Angeles 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 Los Angeles
Yes, we install and service Toto Washlet seats across Los Angeles, including the S550e and similar electronic bidet models. Most of our Washlet work is on the water side: inlet filter replacements, solenoid descaling, and supply-line work. We also add dedicated GFCI outlets and water connections for Washlet seats during bathroom remodels, which is the cleanest way to retrofit one into an older LA bathroom without exposed cords or hacked-in plumbing. Call (803) 680-2547 to get a written quote on Washlet installation or repair.
That’s a ghost-flush, and in Los Angeles it’s usually a worn 3-inch flapper or a fill valve gummed up with hard-water calcium deposits. The toilet refills briefly when water seeps through a failing seal. It’s not a leak that’s going to flood anything, but it wastes water and will get worse. We can replace the flapper and fill valve with Toto OEM parts, usually in a single visit. Call (803) 680-2547 for an exact quote, and we’ll tell you what’s worn before we order anything.
It can be either, and in Los Angeles it’s often both. The Aquia’s flush tower gasket is a known slow-leak point, and we also see wax rings and flanges crack when the slab shifts under older homes here. We check both during service: if it’s just the gasket, the fix is cheap and fast. If the flange is cracked, we’ll tell you before we pull the toilet and give you a written price for the flange repair or replacement. That way you’re not guessing whether the next leak is coming. Call (803) 680-2547 and we’ll diagnose it properly.
Keep it if the bowl is sound and you like the flush. A Toto toilet’s porcelain bowl can outlast several sets of internals, and replacing a sound bowl is often a waste of money. In Los Angeles, where a full bathroom remodel ranges from $10,620 to $33,040, every dollar you don’t spend on a needless toilet replacement can go toward better tile or fixtures you’ll actually enjoy. We’ll assess the bowl, the trapway, and the flush performance and tell you straight whether replacing makes sense. Call (803) 680-2547 for a free walkthrough.
Yes, and we recommend doing it during a remodel rather than after, because it’s cleaner and cheaper that way. We run a dedicated GFCI outlet near the toilet and a proper water connection behind it, so the Washlet installs without exposed wiring or an extension cord. In older Los Angeles bathrooms with plaster walls and older electrical panels, we check the circuit load before we add anything. Call (803) 680-2547 and we’ll scope the job and give you a written price.
Service Areas Near Los Angeles
Most of our Toto construction service work happens in Los Angeles proper, including neighborhoods from the Valley to the Westside. We also take calls from nearby areas and can often schedule outside the city on a case-by-case basis. For Toto work further south, see our Toto service in San Diego page. For the Bay Area side of the state, see Toto service in San Jose. If you’re unsure whether we cover your address, call (803) 680-2547 and we’ll tell you straight. You can also learn more about our full Los Angeles service area, or explore our broader Toto sales & service offerings. We’d rather have you call the wrong number than guess.
Book Your Toto Service in Los Angeles Today
If you need Toto repair, Washlet service, or a full bathroom remodel built around Toto fixtures in Los Angeles, call our General Contractor in Los Angeles at (803) 680-2547 for a free, written estimate. A live person answers, and you’ll know exactly who’s coming, what it costs, and what’s guaranteed before we start. Know who’s coming, know what it costs, know it’s backed up, everything else is just noise.
Written by Isaac Pruett, Owner at Mason Remodeling, serving Los Angeles since 2004.











