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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 Garden Grove, CA | Square One Builders
We install and service Toto fixtures across Garden Grove as an independent provider, and the one thing that separates our work here is what we find behind the walls. Most Garden Grove homes are 1950s – 70s tract builds, and a huge share of their bathrooms have been converted or expanded informally over the years, often without permits. So before we set a new Toto sales & service fixture, we often have to fix what a previous owner left behind. Call (877) 688-9930 for a free estimate.

Why Garden Grove Residents Choose Us for Toto Service
We’re a General Contractor – Garden Grove, not a specialty plumbing shop, which means when we work on your Toto toilet or bidet seat, we can also handle the subfloor, the drain, the vent, and the wall framing around it. That matters in Garden Grove, where a leaking Toto tank gasket has often been quietly softening a subfloor for years before anyone notices. We’ve installed and serviced Toto fixtures in hundreds of Garden Grove remodels, from original Washlet-equipped toilets in 1980s tract homes to new ADU baths going in beside converted garages.
Brent Calloway, our owner and general contractor, grew up in the Midway City pocket just off Bolsa Avenue and has spent nearly three decades working on homes throughout Westminster and the surrounding Orange County communities. He learned framing, concrete, and finish work through the Construction Technology program at Golden West College, then spent years on the ground level, hauling material and reading blueprints until the work made sense. That same insistence on straight answers drives how we handle every Toto job across Garden Grove service area.
Styles & brands we work with







Common Toto Construction Problems We Solve in Garden Grove
- Washlet seat failures from mineral-heavy water. Garden Grove’s water is hard, and after years of use, the seat gasket dries out and the nozzle assembly clogs with scale. We routinely pull scaled-up bidet seats from 1970s baths being gutted, then either rebuild them with OEM parts or recommend a replacement seat if the board is failing.
- Drake fill-valve and G-Max flapper wear causing phantom running. Toto’s flush tower seals degrade over time and the toilet runs intermittently. It’s one of the most common discoveries when we open up a bathroom for a tub-to-shower conversion in Garden Grove.
- One-piece Ultramax and Vespin tank-to-bowl gasket leaks. These leaks are slow and silent, and in original 1950s – 70s plumbing they often rot the subfloor before anyone sees water. We find them during full bath remodels, not during routine service calls.
- Cracked or chipped vitreous china at the bowl rim. Thermal cycling in unconditioned converted garages and ADU suites stresses the china over time. A hairline crack at the rim or a failed bolt cover usually means replacing the bowl, not patching it.
- Unpermitted bathroom additions with undersized drains and vents. Garden Grove’s multigenerational housing culture means many homes have an extra bathroom that was never permitted. Before we can set a Toto toilet or shower valve, we often have to bring the drain, vent, and water closet up to current Orange County code for the city to sign off.
Toto Service in Garden Grove: What Local Conditions Mean for Your Equipment
Garden Grove is a densely built-out mid-century suburb of roughly 170,000 people where most construction is remodel, addition, and rebuild on 1950s – 70s tract lots, not new ground-up building. That shapes every Toto job we do here. A large share of the city’s housing stock has been expanded or converted informally over decades, often to accommodate multigenerational families. We’ll open a hall bath off Garden Grove Blvd in the Koreatown pocket and find a 1990s Toto Ultramax tied into plumbing a previous owner ran through an unpermitted garage conversion, which is why our Stanton Toto service includes full plumbing assessments. The toilet may work fine, but the drain and vent were never sized right and the city won’t sign off on any new work until they’re corrected. That’s the real work in Garden Grove: legalizing what’s already there, then installing Toto fixtures that will hold up for another twenty years. A generic brand service call never deals with this. We do, every week.
Toto Models & Products We Service in Garden Grove
We service the Toto lines most common in Orange County homes and ADUs: the Drake and Drake II two-piece toilets (CST743/CST454), the Ultramax II and Vespin II one-piece toilets, and the Washlet and Washlet+ electronic bidet seats including the S550e, C5, and S7. For converted ADU and garage suites, we also service Toto EcoPower and standard commercial-style flush valves. We spec genuine Toto OEM fill valves, flappers, and Washlet nozzles where the seat is worth saving, and use quality aftermarket only for non-critical hardware. On a 20-year-old one-piece with a weeping tank gasket, our honest advice is usually replacement, because a new Drake costs less than chasing a cracked china bowl.
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AfterToto Service Pricing in Garden Grove
What you’ll pay depends on the scope, and we quote line-by-line so you see exactly where the money goes. Here are the ranges we work with in Garden Grove:
| Service | Price Range |
|---|---|
| Full Bathroom Remodel | $9,000 – $28,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Shower Replacement | $3,000 – $8,500 |
| Bathroom Vanity Installation | $800 – $3,000 |
Cost drivers include whether we’re correcting unpermitted plumbing, replacing rotted subfloor, or moving fixtures. Your free estimate includes a written line-item quote, no change orders unless you approve changes in writing. Call (877) 688-9930 for exact numbers on your project.

Serving Garden Grove, CA — Our Local Coverage Area
We’re based in the Garden Grove area and know this community well, including Westminster Toto service nearby. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Toto Construction in Garden Grove
No. We are an independent Toto service provider and are not authorized by, affiliated with, or endorsed by Toto. What we offer is deep familiarity with their products across hundreds of Garden Grove remodels. We spec OEM parts where they matter and give you straight advice on repair versus replacement.
We use genuine Toto OEM fill valves, flappers, and Washlet nozzles whenever the fixture is worth saving. For non-critical hardware, we’ll use quality aftermarket where it performs the same. We’ll tell you which is which on the quote. Call (877) 688-9930 and we’ll walk you through it.
Most fixture swaps and valve rebuilds take a single visit. A full bathroom remodel with Toto fixtures runs longer, especially if we’re correcting unpermitted plumbing or replacing subfloor. On a gut remodel off Garden Grove Blvd, we replaced a rotted subfloor and a failed Ultramax with a new Drake II, brought the drain and vent to code, and finished the job as a walk-in shower conversion with a frameless enclosure for Toto in Midway City and surrounding areas.
We service the Drake and Drake II two-piece toilets, Ultramax II and Vespin II one-piece toilets, Washlet and Washlet+ bidet seats (S550e, C5, S7), and EcoPower flush valves used in converted garages and ADU suites. If you have a different Toto model, call us. If we can’t fix it properly, we’ll tell you that honestly.
It can, especially if the toilet and tub share a wall or a wet wall. In homes built in the 1960s, the toilet flange and tub drain often tie into the same cast iron or early copper stack. We’ll assess that before we quote, and if the existing Toto toilet needs to be pulled and reset, that’s included in the scope so there are no surprises. Call (877) 688-9930 for an exact quote on your bathroom.
Service Areas Near Garden Grove
We also serve homeowners in surrounding communities, including Toto service in Cypress and Toto service in Fountain Valley, as well as Westminster, Stanton, and Anaheim. If you’re a little further out, call and ask. We’ll tell you straight whether we can get to you.
Book Your Toto Service in Garden Grove Today
Start from square one, build it right. Call (877) 688-9930 to schedule your free estimate, and we’ll give you a written line-item quote before any work begins.
Written by Brent Calloway, Owner at Square One Builders, serving Garden Grove since 2005.