Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Toto Construction in Lemon Grove, CA | Rowan Construction Group San Diego
Toto toilet, Washlet, and bathroom fixture installation in Lemon Grove typically runs $5,000-$28,000 depending on whether we’re setting a single toilet or tackling a full Bathroom Remodeling in Lemon Grove project. We’re an independent San Diego crew, not a Toto-authorized dealer, and we’ve installed and serviced Toto products across hundreds of Lemon Grove remodels, ADUs, and garage conversions since 2007. Call (858) 434-8926 to schedule your free written estimate.
Why Lemon Grove Residents Choose Us for Toto Service
We’ve been working in Lemon Grove long enough to know the difference between a 1952 slab and a 1973 slab, and that matters when you’re setting a Toto one-piece on a closet flange that might have shifted with the clay soil. Our crews carry genuine Toto OEM fill valves, flappers, wax rings, and Washlet solenoids on every truck, and we stock the full Drake and Ultramax II line for same-day replacement when repair doesn’t pencil out.
Grant Rowan, our owner, grew up in Beverly Hills and cut his teeth in Santa Monica College’s construction technology program before spending the better part of two decades on job sites across Southern California. He’s the one redrawing scope-of-work documents at six in the morning when he finds an inconsistency the night before. That discipline carries through to how we quote Toto work: measure twice, document once, then we can talk price. Under Clause 1 of The Haven Standard, the written price arrives before any work starts, every time.
Our Toto sales & service covers everything from a simple toilet swap in a 1960s ranch to full bathroom remodels with wall-hung Aquia models in ADU garage conversions. We pull permits, pass inspections, and leave you with a documented photo record of every visit.
Common Toto Construction Problems We Solve in Lemon Grove

- Washlet C5/C200 control board and solenoid failure. The inland heat in Lemon Grove routinely pushes into the mid-90s, and hard water from the Helix Water District accelerates mineral buildup on electronic bidet components. We see these units fail at 5-7 years, not the 10-year mark you’d expect in coastal San Diego. We stock OEM solenoids and compatible aftermarket boards for discontinued models.
- Constantly running fill valves on Toto Drake and Ultramax toilets. The 528/TSU99A style valves begin failing after 8-10 years because chloramine in local water degrades the rubber seal and flapper chain. It’s a $180-$340 repair in most Lemon Grove homes, and we carry the parts.
- Rocking closet flanges and failed wax rings on slab-on-grade homes. Lemon Grove’s clay-heavy inland soils cause differential settling on original 1940s-60s foundations. A Toto one-piece toilet that sat solid for years starts to rock; the wax ring compresses unevenly and sewage odor follows. We don’t just re-wax - we verify flange height and shim to Toto’s 3/4-inch tolerance spec.
- G-Max flush tower cracks from drop-in bleach tablets. Homeowners trying to manage hard water stains reach for the blue tablets, but the chlorine degrades the rubber gaskets at the tower base. We replace with OEM towers and explain why bleach tablets void the useful life.
- Drain-line fall issues on garage-conversion ADUs. Many 1950s-60s Lemon Grove detached garages sit non-conforming tight to the rear property line. Converting them to ADUs requires verifying as-built footprints against permit records, and that documentation phase often reveals underslab drain lines with inadequate fall for modern Toto wall-hung toilets. We re-pipe to code before the fixture goes in.
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AfterToto Service in Lemon Grove: What Local Conditions Mean for Your Equipment
Lemon Grove is one of San Diego County’s most densely built-out small cities - just 3.9 square miles packed almost entirely with post-WWII single-family homes from the 1940s-1970s. Nearly every construction project here is a renovation or addition on aging stock rather than ground-up new construction, and California’s liberalized ADU laws have made garage conversions and backyard dwelling units the dominant project type as homeowners maximize value on lots that were never designed for two units.
This shapes Toto work in ways that don’t apply in newer suburbs. On a 1959 ranch home near Lemon Grove Avenue, our crew gutted a hall bath during a garage-conversion ADU project and found the original 3-inch cast iron drain had a 1/8-inch-per-foot fall that was too shallow for a Toto Aquia wall-hung toilet; we re-piped to 4-inch PVC with a new closet flange, then installed a Toto Ultramax II with a Washlet C5. The homeowner passed final inspection after we documented the as-built offset from the 1962 permit card. That documentation step - matching the real footprint to the permit record - is where out-of-area contractors stumble in Lemon Grove. We build it into every quote.
The inland heat load matters too. Unlike coastal San Diego, Lemon Grove sits far enough inland to experience meaningful temperature swings, and dry Santa Ana wind events accelerate moisture loss in caulking and seals. For Toto electronic Washlet seats, that means we spec dedicated GFCI circuits and verify amperage capacity on 60-100 amp subpanels that are still common in original homes.
Toto Models & Products We Service in Lemon Grove

We work on the full Toto residential line that shows up in Lemon Grove service area homes:
- Toto Drake (CST744 series) - two-piece gravity toilet with G-Max flush. The workhorse we install most often in rental ADUs and primary baths.
- Toto Ultramax II (MS604) - one-piece with Cyclone flush and CeFiONtect glaze. Our go-to for homeowners who want the cleaning advantage and don’t mind the heavier unit on potentially settled slabs.
- Toto Washlet C5 / C200 - electronic bidet seats. We verify GFCI outlet proximity and amperage before quoting; older Lemon Grove homes often need a dedicated circuit added.
- Toto Eco Ultramax and Aquia wall-hung - popular in ADU conversions for the space savings and clean floor line. Require in-wall carrier systems and precise rough-in dimensions we verify against as-built conditions.
We stock genuine Toto OEM parts for all current models. For discontinued Washlet models, we use quality aftermarket boards only when OEM is no longer available. If a toilet needs more than $400 in parts and labor, we’ll recommend a new Drake or Ultramax with a written price before you commit.
Toto Service Pricing in Lemon Grove
| Service | Price Range |
|---|---|
| Full 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 |
These ranges reflect Lemon Grove’s specific conditions: original slab foundations that may need drain re-piping, 60-100 amp subpanels that may need upgrading for Washlet circuits, and the documentation phase required for non-conforming garage ADUs. Every quote is flat-price with written scope - no change proceeds without a signed change order, which is the discipline that has kept our projects within a few percent of the agreed cost across 4,000-plus jobs.
Your free estimate includes a site visit, fixture placement measurement, drain-line assessment, and written price with no obligation. Call (858) 434-8926 to schedule.
Serving Lemon Grove, CA - Our Local Coverage Area

We’re based in the Lemon Grove 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 Lemon Grove
No - Washlet seats require a grounded GFCI outlet, and we won’t install on ungrounded 2-prong circuits. Most original Lemon Grove homes need a dedicated 15-amp GFCI circuit run from the panel, which we include in the written quote if the bathroom lacks one. Call (858) 434-8926 and we’ll assess your outlet situation during the free estimate.
A running Drake is usually a failed 528 fill valve or degraded flapper seal - a $180-$340 repair that we can complete same-day with OEM parts. Replace only if the bowl has cracks, the tank is leaking at the china, or you’re already planning a Kitchen Remodeling - Lemon Grove or bath project. Call (858) 434-8926 for an exact quote - estimates are free.
Yes, but the drain location determines cost. Tub drains are centered; walk-in showers need a linear or center drain depending on the Toto base you select. On slab foundations, we cut concrete to re-pipe if needed, then pour back with proper slope. We’ve done this conversion on dozens of Lemon Grove ranches. Call (858) 434-8926 for a written price based on your specific drain layout.
The Toto Drake (CST744) with G-Max flush performs reliably at 35 psi minimum, which covers most Lemon Grove homes. The Ultramax II needs similar pressure but delivers better bowl cleaning with less water. We test static and flow pressure during the estimate and spec accordingly. Call (858) 434-8926 to schedule the pressure check.
A direct replacement toilet on an existing flange does not require permit in Lemon Grove. New drain lines, wall-hung carriers, electrical circuits for Washlets, or any work in an ADU conversion all require permits pulled through the City of Lemon Grove - which we handle as part of the project, with inspections scheduled and passed before we close out. Call (858) 434-8926 and we’ll clarify what your specific scope requires.
Service Areas Near Lemon Grove

We run Toto service throughout eastern San Diego County from our local base. Crews are regularly in Toto service in San Diego proper, Toto service in La Mesa, Santee, El Cajon, and Casa de Oro-Mount Helix. Same flat-price quoting, same documented photo record, same Haven Standard discipline applies in every city.
Book Your Toto Service in Lemon Grove Today
Call (858) 434-8926 to schedule your free written estimate. We’ll assess your Toto fixture, your drain lines, your electrical capacity, and your permit needs - then deliver a flat price with scope in writing before any work starts. That’s Clause 1 of The Haven Standard, and it’s how we’ve operated since 2007.
Written by Grant Rowan, Owner at Rowan Construction Group San Diego, serving Lemon Grove since 2007.







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