Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Kohler Home Additions & ADU: The West Palm Beach Owner’s Guide
If you’re planning a home addition or ADU in West Palm Beach and want Kohler fixtures specified throughout, expect to pay between $45,000 and $130,000 for a finished addition, and $90,000 to $220,000 for a full ADU build. We install Kohler tubs, showers, faucets, and toilets as part of larger addition projects regularly, and we stock the common rough-in valves, trim kits, and replacement cartridges on our trucks so a fixture swap doesn’t stall a whole job. Most homeowners don’t discover they need parts until the tile is up and the plumber finds a shower valve that’s incompatible with the trim they picked. That’s the kind of problem we solve before it becomes a change order.
Kohler fixtures in Florida take a beating: hard water from the Biscayne Aquifer, humidity that never quits, and pressure fluctuations that make cartridges work harder than they do up north. We know which parts fail first here, and we spec accordingly. Straight number, full scope, no surprises after the invoice.
Which Kohler Models This Applies To
Kohler’s fixture lines are not interchangeable across the board, and that’s the first mistake we see homeowners make. The Purist, Stillness, Margaux, Composed, and Artifacts collections each use different valve bodies, trim screws, and handle geometry. A Purist handle will not thread onto a Composed valve. Period. If you’re roughing in for an addition, the valve body gets buried behind tile long before you pick trim, so the valve decision matters on day one.
Kohler labels their valves with a model number stamped on the brass body, usually behind the plaster guard. Write that down before the wall closes. The number starts with a “K” followed by four or five digits, like K-8304 for the Rite-Temp pressure-balancing valve or K-2971 for the high-flow thermostatic valve. That number is your compatibility key. OEM Kohler cartridges are worth the extra cost over generic replacements – we’ve pulled too many no-name cartridges out of West Palm Beach showers that scald or stall within a year. Kohler’s ceramic disc cartridges are spec’d for 100,000 cycles minimum. The generics often don’t survive one Florida summer of hard-water cycling.
Styles & brands we work with
Signs Your Kohler Home Additions & ADU Is Failing
- Temperature spikes when someone flushes a toilet. This means the pressure-balancing spool inside the Rite-Temp cartridge is gummed up with scale. West Palm Beach water is hard enough to do this in 18-24 months if the valve isn’t flushed periodically.
- Dripping from the tub spout or showerhead that won’t stop. A ceramic disc cartridge rarely wears out, but sediment scoring from aquifer silt will chew up the sealing surfaces. Once it drips, it’s done – no amount of cranking the handle fixes it.
- The handle turns too far or feels loose. Kohler’s stop limits are designed to prevent over-rotation. When those plastic limit stops snap, the handle spins past the stop point, and that’s a broken internal stop ring, not just a loose screw.
- Reduced flow from the showerhead even after cleaning. The flow restrictor and the valve’s integral stops both catch debris. If flow drops 40% or more, the cartridge inlet screens are packed with sand and scale.
- Water behind the wall or staining on the ceiling below. This is not a part that fails – it’s a failed rough-in connection or a cracked valve body from an over-tightened fitting. Shut the water off immediately and call us. Nobody wants a slow leak inside a new addition’s wall cavity feeding mold in this humidity.
See the difference
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After
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AfterReplacement Cost & What’s Included
For fixture parts specifically, here’s what West Palm Beach homeowners should expect:
- Kohler cartridge replacement (shower or tub valve): $180 – $450 installed, depending on access. If we can pull the trim and swap the cartridge without opening the wall, it’s on the low end. If the tile has to come off, the number climbs.
- Kohler valve body replacement (rough-in): $600 – $1,800 installed. This requires opening the wall, sweating or crimping new connections, and patching. We do the plumbing and the drywall, and we leave the site clean.
- Kohler shower trim kit replacement: $250 – $900 installed, depending on the collection. Purist and Stillness trim runs higher than Devonshire or Bancroft.
- Full addition or ADU with Kohler fixtures spec’d throughout: $45,000 – $130,000 for additions; $90,000 – $220,000 for ADUs. Fixtures are a line item in the written estimate. The number on paper is the number you pay.
Every price above includes the part, the labor, and our cleanup. We pull permits when required, and the permit cost is part of the written estimate, not a surprise at the end. The 365-Day Done Right Promise covers the workmanship for a full year after close-out, in writing. If something fails inside that window, we come back and correct it. No charge, no argument.
DIY or Call Us?
Replacing a Kohler cartridge is a job a careful homeowner can attempt if the valve was installed with an access panel and the shut-off valves work. Turn off the water, pull the trim with a hex key, and swap the cartridge. That’s the easy path when everything goes right. But here’s what we see in West Palm Beach: the stop valves are 20 years old and frozen, the trim screw is stripped, or the valve was roughed in too deep and the cartridge refuses to seat. That’s when a 45-minute DIY job becomes a flooded bathroom and a hole in the wall. If you’re unsure, call (728) 203-9809 and we’ll tell you over the phone whether it’s worth doing yourself. We don’t upsell a service call when a $30 cartridge will fix it.
One more thing worth saying clearly: if the problem is water behind the wall, do not wait. This climate turns a small leak into mold and rot quickly. Call us.
FAQs
With our hard water, a Kohler Rite-Temp cartridge typically lasts 8 to 12 years before it leaks or sticks. That’s shorter than the 15-plus years Kohler sees in soft-water markets. Annual flushing of the valve extends the lifespan. If yours fails inside year one of a Bradford Remodeling install, the 365-Day Done Right Promise covers the replacement at no cost to you.
Yes, if the failure is the cartridge or the trim, we repair it. If the brass valve body is cracked or the integral stops are stripped, replacement is the only option. We’ll show you the damaged part before we quote the repair, so you’re not taking our word for it. Call (728) 203-9809 and we’ll schedule a look.
A cartridge replacement takes 45 minutes to two hours once we’re on site. A full valve body replacement takes a day, including wall repair. Additions and ADUs with multiple Kohler fixtures run their own timeline, which is laid out in the written scope before we start. We don’t pad schedules, and we don’t leave a job half-finished.
We keep common Rite-Temp cartridges, pressure-balancing units, and O-ring kits on our trucks because these are the parts most likely to fail mid-project. Specialty trim or unusual valve bodies get ordered directly from Kohler, which typically takes 3 to 7 business days to arrive in West Palm Beach. We also work with KraftMaid, Cambria, and Silestone for those who want a fully-coordinated addition.
Call (728) 203-9809 for a free estimate on any Kohler fixture swap, addition, or ADU project in West Palm Beach. A live person answers. You’ll get a written price before any work starts, and the work is backed by the 365-Day Done Right Promise.
Written by Curtis Lane, Owner, Bradford Remodeling Co – West Palm Beach at Bradford Remodeling Co West Palm Beach, serving West Palm Beach and nearby areas.
