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 Sunnyslope, CA | Square One Builders
Square One Builders provides independent Toto fixture service, installation, and bathroom remodeling across Sunnyslope, CA. We’re not affiliated with or authorized by Toto, but we’ve fitted and repaired their fixtures in Riverside County homes long enough to know exactly how they behave here. The one thing that separates Toto work in Sunnyslope from neighboring cities is the floodplain reality along the Santa Ana River, which changes how we approach every bathroom job before a single fixture goes in. Call (877) 688-9930 to talk through your project.

Why Sunnyslope Residents Choose Us for Toto Service
Our crew has worked on Toto products across the Riverside basin for years, from the entry-level Drake two-piece to wall-hung Neorest seats that cost more than some used cars. We know how these fixtures handle hard water, how their seals age in dry heat, and what fails first when a bathroom sits in a home that bakes through summer. That field experience means we diagnose faster and stop chasing the wrong part.
Brent Calloway, our owner and general contractor, spent nearly three decades working on Orange County and Riverside County homes before founding Square One Builders. He learned framing, concrete, and finish work at Golden West College, then spent years on job sites asking questions until he got straight answers. That instinct, to understand the actual problem before touching a wrench, still drives how we approach every Toto service call in Sunnyslope. We spec the right part for the failure, not the part that’s easiest to order.
Styles & brands we work with







Common Toto Construction Problems We Solve in Sunnyslope
These are the failures we see most often when we open up a Toto fixture in Sunnyslope homes:
- Washlet and Neorest electronic seat failures from hard water: Sunnyslope’s mineral-heavy water clogs wand nozzles and inlet filters with scale. We regularly open up seats where the pump is straining or the control board has given out after years of mineral exposure, especially in bathrooms off garages that hit 100°F and never cool down.
- Tank-to-bowl and fill-valve leaks on Drake and Ultramax models: The rubber flapper and fill valve harden in dry Riverside heat. Add mineral buildup on the valve seat, and you get a toilet that runs constantly or seeps at the tank bolts. This is the most common call we get from Sunnyslope homeowners.
- Toto bowls rocking off cracked flanges: Sunnyslope’s slab-on-grade foundations sit on clay soil in the Santa Ana River floodplain. That soil moves, slabs settle, and flanges crack. We routinely find Toto Drakes rocking at the base with a failing wax ring underneath, leaking slowly into the slab.
- Skirted and wall-hung model hardware issues: The Toto Promenade and Vespin II use concealed inlets and mounting hardware that’s easy to mis-order. When a generic aftermarket fill valve goes into one of these, you get weak flushes and short-cycling that drives up the water bill.
- Washlet seats that never should have been installed in direct sun exposure: Sunnyslope summers routinely exceed 100°F, and a bathroom window that faces west turns a Washlet seat into an oven. Control boards fail early when that heat is constant. We now check sun exposure before we recommend any electronic seat.
Toto Service in Sunnyslope: What Local Conditions Mean for Your Equipment
Sunnyslope is unincorporated Riverside County, which means every permit runs through county channels, not a city building department. When a bathroom remodel touches drain or supply lines near the Santa Ana River floodplain, which covers much of the area west of the community, county flood-control review can get added to the permit package. That’s a step contractors in Corona or Riverside proper might never encounter, and it can add days or weeks to a job. We plan for it before we pull a toilet flange or set a Toto fixture, so the inspection schedule doesn’t stall your remodel halfway through. On a bathroom remodel off the river side of Sunnyslope, our crew pulled a Toto Drake that had been rocking on a cracked flange for years, part of our Toto repair in Glen Avon and surrounding areas. Clay-soil settlement had opened a gap under the bowl and the wax ring was gone. We reset the flange, leveled the subfloor, reinstalled the Drake with a new wax seal and OEM fill valve, then set a Toto Washlet whose wand we descaled to clear the hard-water scale that had been choking it. That job is what Toto work in Sunnyslope actually looks like: floodplain slab movement below, mineral scale above.
Toto Models & Products We Service in Sunnyslope
We work on the full Toto residential line, including the Drake and Drake II two-piece, Eco UltraMax and Ultramax II one-piece, Promenade and Vespin II skirted designs, and the Washlet and Neorest electronic bidet seats. For parts, we fit genuine Toto fill valves, flappers, flush towers, and Washlet components where they matter most; those electronic seats and flush mechanisms need OEM parts to function correctly. For standard supply lines and wax seals, we use quality aftermarket parts when the homeowner wants to keep the bill down. We keep common Toto parts on hand for faster Toto service in Pedley and Sunnyslope turnaround, and anything else we pull from our local supply accounts, usually same-day or next-day. Start from square one, build it right.
See the difference
Before
After
Before
After
Before
AfterToto Service Pricing in Sunnyslope
Here’s what bathroom work with Toto fixtures runs in the Sunnyslope market. The ranges reflect what we’ve quoted across Riverside County, and they hold for most unincorporated-area jobs where floodplain review doesn’t add unusual scope:
| Service | Price Range |
|---|---|
| Bathroom Remodel | $9,000 – $28,000 |
| Small Bathroom Remodel | $5,000 – $12,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Bathroom Vanity Installation | $800 – $3,000 |
| Shower Replacement | $3,000 – $8,500 |
What drives the cost is whether we’re swapping a fixture or opening walls, moving drains, and resetting a flange on shifting slab. A free estimate from us includes a site look, a written line-item quote, and an honest read on whether your Toto fixture should be repaired or replaced. Call (877) 688-9930 to schedule one.
Serving Sunnyslope, CA — Our Local Coverage Area
We’re based in the Sunnyslope 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 Sunnyslope
Yes. The mineral-heavy water in Sunnyslope scales the wand nozzles and inlet filters on Washlet and Neorest seats, and over time that clogs the pump and strains the control board. We descale these units regularly and can set you up with a maintenance schedule. Call (877) 688-9930 if your seat has slowed to a trickle.
In Sunnyslope, the usual cause is a cracked flange from clay-soil settlement under slab-on-grade foundations. The bowl shifts, the wax ring fails, and seepage starts. We reset flanges and reseat the bowl, and we check the subfloor for movement before we call it fixed.
If your bathroom remodel touches drain or supply lines near the Santa Ana River floodplain, Riverside County may add flood-control review to your permit package. We handle that coordination as part of the job, so you’re not chasing paperwork. Call (877) 688-9930 and we’ll tell you whether your property is in the review zone.
If the control board is failing and the unit is past its service life, replacement often beats chasing a repair. We’ll tell you straight which side of that line your unit falls on, and we’ll quote both options before you spend a dollar. Estimates are free at (877) 688-9930.
Yes. We handle full bathroom remodels in Sunnyslope, including walk-in showers, tile and flooring, and vanity installation, so we can spec a Toto fixture that fits the design and the plumbing rough-in. From the ground up, your remodel, fully managed.
Service Areas Near Sunnyslope
We run Toto service calls and full bathroom remodels throughout the Jurupa Valley area and beyond. That includes Toto service in Riverside, Toto service in Rubidoux, plus Corona, Norco, and the La Verne area. If you’re just outside those spots, call us and we’ll tell you if your job fits our schedule.
Book Your Toto Service in Sunnyslope Today
Whether it’s a rocking Drake, a clogged Washlet, or a full bathroom remodel with county floodplain review in the mix, we’re ready to get your Sunnyslope job moving. Call (877) 688-9930 and ask for a free estimate.
Written by Brent Calloway, Owner & General Contractor at Square One Builders, serving Sunnyslope, CA and the surrounding Riverside County communities.