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Kohler Construction in Irvine, CA | Square One Builders
We’re an independent Kohler service provider working across Irvine’s tract villages and newer Great Park neighborhoods. The short answer: we install and repair Kohler fixtures, and what separates our work here is knowing which village you live in before we ever open the wall. Kohler rough-in conventions and HOA submittal requirements differ block by block in Irvine, and 30 years of local work means we know what we’ll find behind the plaster. If you need Kohler service or a full bathroom remodel in Irvine, call (877) 688-9930 for a free estimate. We’re Square One Builders, led by Brent Calloway, and we’ve been working Irvine homes since before the Great Park had streets.

Why Irvine Residents Choose Us for Kohler Service
Brent Calloway grew up in the Midway City pocket off Bolsa Avenue and spent years learning framing, concrete, and finish work through Golden West College’s Construction Technology program. That background means he treats a Kohler valve replacement as part of a larger system, not a quick parts swap. We’ve installed and repaired Kohler fixtures across Irvine and nearby communities long enough to recognize which lines hold up in this climate and which failure patterns repeat block after block — including Tustin Kohler service calls with similar hard-water wear. We use genuine Kohler OEM cartridges, fill valves, and trim on anything under warranty, and quality aftermarket equivalents only where the OEM part is discontinued or the remaining fixture life doesn’t justify the cost. We’ll also tell you plainly when a repair is worth it and when replacement makes more sense. That honesty is rare enough that Irvine homeowners tend to call us first when a Kohler fixture acts up.
We’re a full-scope general contractor, not a plumbing-only shop. That matters because a Kohler tub-to-shower conversion or walk-in shower replacement often involves framing, drywall, waterproofing, tile, and sometimes HOA paperwork. One contractor handles all of it. Start from square one, build it right.
Styles & brands we work with







Common Kohler Construction Problems We Solve in Irvine
- Scored ceramic disc cartridges in Kohler Bancroft and Devonshire faucets. Irvine’s municipal water is hard and mineral-heavy. Those deposits score the ceramic discs inside the cartridge, and within a few years you get drips and stiff handles. We see this most often in the 1970s and 1980s tract villages, where the original supply lines are aging and pressure fluctuates enough to accelerate the wear.
- Finish flaking and pitting on Kohler Vibrant and brushed-metal trim. Irvine’s semi-arid climate means intense UV through sun-facing windows and skylights, and that exposure breaks down plated finishes faster than most homeowners expect. A bathroom in Northwood with an east-facing skylight will show trim degradation years before the same fixture in a shaded downstairs bath.
- Toilet fill and flush valves failing in original 1970s – 90s tract-bath Kohler toilets. As first-generation PVC supply lines scale up and municipal pressure shifts, the older Kohler fill valves in Woodbridge and University Park homes start running constantly or failing to refill. Sometimes it’s a simple valve swap. Sometimes the scaling inside the supply line means a larger repipe conversation.
- Corroded drain flanges on cast-iron Kohler tubs and shower assemblies. In the older Irvine villages, the drain connection where a cast-iron Kohler tub meets the subfloor is a common corrosion point. Woodbridge and University Park homes built in the 1970s and 1980s are now at the age where those flanges rot through, and the first sign is usually water staining on the ceiling below.
- Two-handle Kohler valves that no longer meet anti-scald code. Any remodel that touches a shower valve in Irvine today has to meet current anti-scald requirements, so those original two-handle Kohler valves from the tract era can’t stay. A tub-to-shower conversion almost always includes swapping to a pressure-balance valve.
Kohler Service in Irvine: What Local Conditions Mean for Your Equipment
Irvine’s villages were built in distinct tract waves under Irvine Company architectural-control schedules, and that has a direct effect on Kohler work. A 1970s Woodbridge bath and a brand-new Great Park bath use entirely different Kohler rough-in conventions — just as Kohler in North Tustin homes follows its own tract-era patterns. The older tract homes we see typically have cast-iron tubs, two-handle or early single-handle valves, and drain assemblies sized for 1970s plumbing. The newer Spectrum and Orchard Hills tracts use modern pressure-balance valves, different drain styles, and fixtures still under builder warranty. Knowing which village you’re in tells us which valve bodies and drain styles we’ll actually find behind the wall, and it tells us which HOA architectural review board we’ll be dealing with. A contractor who treats all of Irvine as the same job is going to get surprised mid-demolition. We don’t.
In a Woodbridge townhome off Springbrook, our crew opened a 1980s hall bath to find an original Kohler cast-iron tub with a corroded drain flange and a two-handle Kohler valve that no longer met anti-scald code — a scenario we’ve also handled during Kohler repair in Santa Ana vintage tracts. We converted it to a Kohler Choreograph walk-in shower with a new pressure-balance valve, re-flashed the drain, and passed HOA architectural review before the tile went back up. That’s the difference Irvine demands.
Kohler Models & Products We Service in Irvine
We work on the full range of Kohler lines commonly installed in Orange County homes: Memoirs and Artifacts bath fixtures, Bancroft and Devonshire faucets, Corbelle and Santa Rosa toilets, Choreograph shower wall systems, and cast-iron Tea-for-Two tubs. For repairs, we stock the most common OEM cartridges and fill valves locally so most Irvine service calls don’t wait on a parts order. When a part is discontinued or backordered, we’ll tell you what the aftermarket options actually are and whether they’re worth using. We don’t default to a full fixture swap just because a $30 cartridge is hard to find. As an independent provider, our only interest is what works in your house, not moving Kohler’s inventory. If you’re planning a remodel rather than a repair, see our Kohler sales & service guide for line comparisons.
See the difference
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AfterKohler Service Pricing in Irvine
Pricing for Kohler construction work in Irvine depends on what’s behind the wall, not just the fixture itself. A simple cartridge replacement costs far less than a tub-to-shower conversion that involves drain rework and HOA submittal. Here are the line-item ranges we quote most often in Irvine:
| Kohler Service | Typical Irvine Range |
|---|---|
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Bathroom Vanity Installation | $800 – $3,000 |
| Shower Replacement | $3,000 – $8,500 |
A free estimate from us includes a look at the existing rough-in, the HOA situation if it applies, and a written line-item quote so you know exactly what the work costs before you sign anything. Call (877) 688-9930 and we’ll walk you through it.

Serving Irvine, CA — Our Local Coverage Area
We’re based in the Irvine area and know this community well, and we also provide Kohler service in Aliso Viejo. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Kohler Construction in Irvine
In most Irvine villages, yes. Irvine is a master-planned city governed by Irvine Company village-specific design guidelines, and even interior remodels that don’t change exterior appearance can trigger HOA review when they involve plumbing, drainage, or structural changes. Woodbridge, Northwood, Turtle Rock, and Great Park each have their own architectural review board with different submittal requirements. We handle that paperwork for you as part of the project, but it’s a real step you shouldn’t skip, and it can add days to the timeline. Call (877) 688-9930 and we’ll tell you what your specific village requires.
Irvine’s municipal water is hard and mineral-heavy, and the minerals score the ceramic disc cartridges inside Kohler faucets faster than the manufacturer’s average lifespan predicts. This is especially true in the older tract villages where supply lines have decades of internal scaling. We replace the scored cartridge with a genuine Kohler OEM part and can also talk through whole-house water conditioning if you’re tired of the cycle repeating.
Yes, and we do it regularly in Woodbridge, University Park, and the other older Irvine villages. The main considerations are the drain location, the condition of the subfloor around the old cast-iron tub, and whether the existing valve meets current anti-scald code. Most 1970s two-handle Kohler valves don’t, so the conversion usually includes a new pressure-balance valve. Call (877) 688-9930 for an exact quote on your specific bath.
Yes. Kohler Choreograph systems are designed to install quickly without deep wall demolition, which makes them a practical option for Irvine condos and townhomes with shared walls. The main consideration is HOA approval for any plumbing work that touches common wall assemblies, and we handle that submittal as part of the project. Your specific HOA rules will determine the approval timeline.
We repair when the fixture is worth repairing. If a Kohler fixture is still under factory finish or performance warranty, we use genuine OEM cartridges, fill valves, and trim. When the OEM part is discontinued or the cost of repair approaches the value of the remaining fixture life, we’ll tell you straight and give you a replacement quote instead. We don’t default to a full swap because it’s easier for us. Call (877) 688-9930 and we’ll give you an honest assessment.
Service Areas Near Irvine
Our Kohler service area covers all of Irvine, including the 92606, 92612, 92614, and 92616 ZIP codes, and extends to nearby Orange County communities. We also provide Irvine service area coverage for full remodels, and Kohler work in neighboring cities including Kohler service in La Habra and Kohler service in Brea. If you’re on the edge of Irvine in Corona, La Verne, El Cerrito, Montclair, Claremont, or Norco, call us and we’ll confirm coverage.
Book Your Kohler Service in Irvine Today
If your Kohler faucet is dripping, your cast-iron tub drain is seeping, or you’re ready to convert that tired bath into a walk-in shower, call (877) 688-9930 today. We’ll schedule a free estimate, check your village’s HOA requirements, and give you a written quote. Your remodel, fully managed.
Written by Brent Calloway, Owner at Square One Builders, serving Irvine since before the Great Park had streets.