Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
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FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Toto Construction in Orange, CA | Square One Builders
We install, set, and rebuild around Toto fixtures throughout Orange, CA, from Drake two-piece swaps in Chapman University-area rentals to Toto service in Anaheim and full Neorest retrofits behind historic Craftsman front doors. We’re an independent crew, not manufacturer-affiliated, and we know Toto bowls, in-wall carriers, and Washlet plumbing better than most GCs in the county. The one thing that makes our Toto work different here: we understand Old Towne’s design-review triggers, and we check that before we cut drywall. Call (877) 688-9930 for a straight answer on your scope.

Why Orange Residents Choose Us for Toto Service
Our Toto work starts with familiarity that only comes from repetition. We’ve set Drakes, Aquias, and wall-hung units in 1920s bathrooms where the subfloor slopes and the flange sits below grade, and we’ve done the same in clean 1960s tract homes off Lincoln Avenue where the plumbing is predictable and the walls are true. Orange gives us both, often on the same week. Brent Calloway grew up in the Midway City pocket off Bolsa Avenue and learned finish work through Golden West College’s Construction Technology program, then spent decades getting straight answers the hard way. That’s the lens we bring to your Toto job. We use genuine Toto OEM fill valves, gaskets, and Washlet components on anything still worth the repair, and we stock the common wear parts locally so an Orange call doesn’t wait on a warehouse in Texas.
Styles & brands we work with







Common Toto Construction Problems We Solve in Orange
- Washlet electronics failing from hard Santa Ana River plain water. Orange’s semi-arid water leaves mineral scale on wand nozzles and heating elements. We see weak spray patterns, error codes, and seats that stop heating. In many cases, the fix is a genuine Toto nozzle and element replacement, not a whole new seat. But we’ll tell you straight when a 15-year-old S550e isn’t worth the electronics spend.
- Drake and Aquia fill and flush valve wear. Hard water shortens the life of fill valves and tank-to-bowl gaskets. The classic symptom is a slow refill or phantom running, and the gasket hardens and leaks at roughly the 8-to-10-year mark. We replace with OEM internals so the next decade starts clean.
- In-wall carrier and flush actuator issues on wall-hung Toto units. This shows up most often in older Orange remodels where the carrier wasn’t blocked properly or the access panel got buried behind tile. We fix the actuator and we fix the carrier, and if we opened the wall, we set it so the next repair doesn’t mean demolition.
- Undermount Aquia bowls loosening on pre-1930s plumbing. Old Towne bathrooms we open up frequently have cast-iron flanges below finished floor, and the sealant fails as the floor flexes. We reset the bowl on a corrected flange with proper blocking before tile goes down, because a wax ring alone won’t hold on a floor that moves.
- Historic-scope Toto upgrades triggering design review. A bathroom remodel that moves a toilet, adds an in-wall carrier, or swaps a window in Old Towne can require preservation approval. We check the scope against the city’s design guidelines before we cut anything, and that up-front check saves homeowners a redo and a delay.
Toto Service in Orange: What Local Conditions Mean for Your Equipment
Here’s the thing about Toto work in Orange that doesn’t apply a few miles away in Costa Mesa or Tustin. In Old Towne Orange, even a rear addition or a bathroom reconfiguration can trigger the city’s historic design review, because this district holds one of the largest concentrations of pre-1930s Craftsman and Victorian homes in the western United States. A Toto upgrade that moves a toilet a foot to the left, or adds a wall-hung carrier where there was a floor-mounted bowl, is not just plumbing. It’s a preservation matter. We start every Old Towne Toto job by checking whether the scope needs design-review approval, and we plan fixture placement and carrier blocking around what the guidelines will clear. The same wall-hung Toto swap in the 92865 tracts a few blocks east needs no review at all. Knowing which side of that line you’re on is the difference between a clean permit and a stalled project.
Toto Models & Products We Service in Orange
We service the Toto lines Orange homeowners actually have: Drake (CST743/CST746 series two-piece toilets), Aquia undermount two-piece and wall-hung units, the Neorest integrated toilets, Washlet seats including the S550e, S750e, and C-series, plus EcoPower faucets and Toto’s in-wall carrier systems. Our parts approach is simple: genuine Toto OEM fill and flush valves, gaskets, and Washlet components on anything still under meaningful life, and quality aftermarket only on discontinued internals where OEM pricing doesn’t make sense. We stock the common Toto wear parts locally, and our Toto sales & service expertise spans full bathroom remodels, walk-in showers, and vanities built around your existing fixtures.
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AfterToto Service Pricing in Orange
Bathroom work in Orange spans a wide bracket, and the price depends on age of the house, condition of the subfloor, and whether the job lands in historic-review territory. Here’s what we see in this market.
| Toto Service | Orange Price Range |
|---|---|
| Full Bathroom Remodeling | $9,000 – $28,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Shower Replacement | $3,000 – $8,500 |
| Bathroom Vanity Installation | $800 – $3,000 |
What drives the number: cast-iron versus ABS plumbing, floor leveling, design-review scope, and whether you’re keeping the existing Toto or starting fresh. We give written line-item quotes, not ballpark promises. Call (877) 688-9930 to schedule a free estimate, and we’ll give you the real number for your job.

Serving Orange, CA — Our Local Coverage Area
We’re based in the Orange 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 Orange
A Washlet that stopped spraying or throws an error on Orange water is usually a scaled wand nozzle or a mineral-caked heating element, both of which we can replace with genuine Toto parts. If the seat is under about eight years old, the repair is typically the better spend, and we’ll say so. If it’s a 15-year-old seat with failing electronics, a new Washlet or Neorest install is often the smarter move. Call (877) 688-9930 and we’ll diagnose it over the phone, free.
A Drake that runs or refills slowly in Orange is almost always a worn fill valve or a hardened tank-to-bowl gasket from hard Santa Ana River plain water. We replace both with Toto OEM parts, because aftermarket internals on a Drake cause the same problem again within a year or two. This is a same-week fix for most Orange homes, and the estimate is free.
Yes, and this is one we see regularly in pre-1930s Old Towne bathrooms where the flange sits below finished floor. A loosening Aquia is usually a failed seal on a floor that flexes. We reset the bowl on a corrected flange, add proper blocking, and re-seal so it holds. If the cast-iron flange itself is cracked, we replace the flange section before resetting the bowl. Call (877) 688-9930 for an on-site look.
It depends on scope. A full bathroom remodel in Orange runs $9,000 to $28,000, while a simple vanity swap can land between $800 and $3,000, and a shower replacement between $3,000 and $8,500. If you’re in Old Towne and the work triggers design review, that adds a step but not a surprise cost – we factor it in up front. Call (877) 688-9930 and we’ll price your actual scope, not a generic square-foot number.
Service Areas Near Orange
We run Toto service throughout Orange and into the neighboring communities: Costa Mesa to the south, where condos and older remodels keep us busy with Toto service in Costa Mesa; Tustin to the east, where Toto service in Tustin covers mid-century tract homes; plus Corona, Norco, and parts of unincorporated Orange County. If you’re within a short drive of the Orange service area, we’ll come assess your Toto job with no charge for the estimate.
Book Your Toto Service in Orange Today
If your Toto fixture needs work in Orange, call (877) 688-9930. We’ll schedule the free estimate, check the design-review scope up front if you’re in Old Towne, and give you a written number before any work starts. From the ground up, one General Contractor – Orange, every system. Start from square one, build it right.
Written by Brent Calloway, Owner & General Contractor at Square One Builders, serving Orange since 1996, with Toto repair in Villa Park among our regular service areas.