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Toto Construction in Los Serranos, CA | Square One Builders
We service and install Toto fixtures throughout Los Serranos, from a simple fill-valve swap in a Drake to a full bathroom remodel built around a new Ultramax II, and we also offer Toto service in Chino. What makes our Toto work different here comes down to one thing: Los Serranos is unincorporated San Bernardino County, and a Toto bathroom project needs county permits and county inspections, not Chino Hills city ones. We plan for that split from the first site visit so your rough-in actually clears. Call (877) 688-9930 for a free estimate on any Toto repair, replacement, or remodel in the 91709 ZIP.
Why Los Serranos Residents Choose Us for Toto Service
We’ve handled Toto fixtures across hundreds of South County bathroom and kitchen remodels, from original 1980s ranch baths near the Chino Hills border to current infill builds. That experience means we recognize the quirks of each Toto generation, whether it’s a G-Max flush tower gasket degrading on a Drake or a Washlet inlet screen clogging in hard Inland Empire water. Brent Calloway, our owner and general contractor, spent years doing ground-level work before running this company, and that same instinct, seeing what’s actually behind the wall before quoting, is how we approach every Toto job in Los Serranos. We’re an independent Toto service provider, not authorized, sponsored, or endorsed by Toto, and we say so plainly because you should know exactly who’s working on your home. Our Toto sales & service work spans the full fixture line, and our Los Serranos service area coverage means we know the exact permit path your job needs.
Styles & brands we work with
Common Toto Construction Problems We Solve in Los Serranos
- Washlet seat failures from mineral buildup: Hot inland summers and hard water leave dried-out inlet screens and mineral-clogged nozzles on S500e and C100 class seats. Owners often assume the unit is dead when the real fix is a screen cleaning and an OEM nozzle replacement.
- Phantom running toilets at night: The Drake’s G-Max flush tower gasket wears over time, letting the toilet cycle silently in the early morning hours. That slow fill wastes water and runs up the bill on large-lot Los Serranos properties with private wells.
- Ultramax II tank-to-bowl seepage: One-piece fixtures can develop gasket seepage that shows as a rust stain at the flange or a soft subfloor under the toilet. We see this often in older ranch homes where plumbing has shifted over decades.
- Seized supply stops and braided lines: When a remodel touches a 20-year-old Toto install, the original supply stops and braided lines often weep or seize at the fixture side. It’s a mid-project discovery we plan for rather than react to.
- Rough-in mismatches on older slabs: Los Serranos ranch homes on slab foundations sometimes have rough-in dimensions that don’t match newer Toto bowls, especially Ultramax II units. We measure before we order so the fixture doesn’t arrive and sit in the garage.
Toto Service in Los Serranos: What Local Conditions Mean for Your Equipment
Los Serranos runs on county building permits even though Chino Hills surrounds it on every side. That jurisdictional line isn’t academic, it changes how a Toto bathroom remodel gets signed off. When we pull a rough-in for a new Toto Drake or a walk-in shower with a Washlet rough-in, the county inspector reviews the fixture placement, the supply lines, and the DWV rough before the wall closes. A job on one side of the street clears through county plan check while the house across the street goes through Chino Hills city review, and mixing them up stalls the final for weeks. We’ve done county-side remodels near Los Serranos Country Club where the inspector wanted the Toto supply stop at a specific height and the tub-to-shower conversion drain sized a certain way, similar to what we handle with Yorba Linda Toto service. Knowing that ahead of the permit submittal keeps the project moving without a failed inspection or a change order. For a homeowner planning a Toto installation in Los Serranos, the practical takeaway is simple: ask any contractor which jurisdiction the address falls under and have them show you the permit route before work starts.
Toto Models & Products We Service in Los Serranos
We service the Toto Drake in both the CST743 and CST744 two-piece configurations, the one-piece Ultramax II, Washlet bidet seats from the S500e and C100 class, and the Guinevere and Clayton collection fixtures. Our parts approach is deliberate: we use genuine Toto OEM fill valves, flappers, gaskets, and washlet components because aftermarket parts on G-Max and washlet units tend to fail early and shorten the fixture’s remaining life. For Los Serranos homeowners, that means we keep the common OEM wear parts stocked locally so a Drake fill valve or Washlet screen doesn’t wait on a shipping delay. If a Toto fixture is structurally sound, we repair it. We only recommend replacement when the bowl, tank, or washlet electronics are beyond economical repair.
See the difference
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AfterToto Service Pricing in Los Serranos
Toto fixture work in Los Serranos falls into a few clear cost bands. A full bathroom remodel ranges from $9,000 to $28,000, while a small bathroom remodel runs $5,000 to $12,000. If you’re converting a tub to a shower, expect $3,500 to $10,000, and a new vanity installation runs $800 to $3,000. What drives the total is the condition of the existing plumbing behind the wall, the permit scope the county requires, and whether the subfloor or flange needs repair. Our free estimate includes a line-item breakdown of fixture work, rough-in, and finishes, so you know the number before we start. Call (877) 688-9930 for an exact quote on your Toto job.
| Toto 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 |
| Bathroom Vanity Installation | $800 – $3,000 |
| Small Bathroom Remodel | $5,000 – $12,000 |
Serving Los Serranos, CA — Our Local Coverage Area
We’re based in the Los Serranos 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 Serranos
Yes, almost always. Because Los Serranos sits in unincorporated San Bernardino County, a Toto bathroom remodel that moves a fixture, opens a wall, or changes a drain needs a county building permit and county inspection, not a Chino Hills city one, which differs from Toto repair in Montclair. The fixture rough-in has to be signed off by a county inspector before the wall closes, or the final won’t clear. Call (877) 688-9930 and we’ll check your specific address against the county records before you spend anything.
In Los Serranos, it’s usually the water. Hard Inland Empire water dries out inlet screens and clogs the Washlet nozzles with mineral scale, which mimics a dead unit. We replace the OEM screen and clean or replace the nozzle assembly first, then test the electronics. If the seat is still dead after that, we quote a replacement honestly.
Yes, and we usually recommend it if the bowl and tank are structurally sound. We swap in genuine Toto OEM fill valves, flappers, and gaskets, then reset the Drake on a fresh flange during the remodel. The only time we push replacement is when the flush tower, trapway, or tank has a crack that isn’t worth chasing. Call (877) 688-9930 for a free assessment.
In most cases, the G-Max flush tower gasket on a Drake has degraded and the toilet is cycling to refill the tank. It’s a slow leak that wastes water and spikes a private-well pump cycle on large-lot Los Serranos properties. We replace the gasket with an OEM Toto part, which is a same-visit fix in most cases. Call (877) 688-9930 and we’ll diagnose it.
Usually yes, but the rough-in has to be checked first. Many Los Serranos ranch homes have slab foundations or aged supply stops where the fixture connects, and a one-piece Ultramax II sometimes has a different rough-in than the original bowl. We measure the flange position and supply location before ordering so the new Toto drops in without a mid-project surprise. Call (877) 688-9930 for a rough-in check.
On a ranch-style home near Los Serranos Country Club, our crew opened a bath wall to relocate a Toto Ultramax II and found the fill valve and tank-to-bowl gasket had been seeping into the subfloor for years. We swapped in OEM Toto gaskets and a new fill valve, sistered the soft subfloor, and reset the toilet on a fresh flange before tiling the walk-in shower. The homeowner kept the original Toto bowl and tank, it was solid, and only the worn internals were replaced. Start from square one, build it right.
Service Areas Near Los Serranos
We also provide Toto service in Toto service in Rancho Santa Margarita and Toto service in Trabuco Canyon, along with the surrounding areas of Corona, La Verne, Montclair, Claremont, and Norco.
Book Your Toto Service in Los Serranos Today
Whether it’s a running Drake, a Washlet that stopped spraying, or a full bathroom remodel with a new Toto fixture, we can put a plan together, just as we do for Pomona Toto service. Call (877) 688-9930 to schedule a free estimate. We’ll confirm your permit path, check the rough-in, and give you a straight answer.
Written by Brent Calloway, Owner & General Contractor at Square One Builders, serving Los Serranos and the surrounding communities since 1994.