Bathroom Remodeling in St. George, UT
Marlin Plumbing handles every plumbing phase of your bathroom remodel — from demolition rough-in to final fixture installation — with the precision and code expertise Southern Utah homeowners have trusted since 1978.
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Full-Service Bathroom Plumbing for Southern Utah Remodels
Marlin Plumbing provides bathroom remodeling plumbing as a standalone service coordinated with your existing contractor team, or as part of a full-service plumbing scope that includes re-piping aging supply lines discovered during demo. Many bathroom remodels in St. George's older housing stock reveal 40-year-old copper supply lines or galvanized drain pipes that should be replaced while the walls are open — we'll identify these issues in the pre-remodel assessment and provide a combined scope that takes advantage of the access.
If hard water protection is a priority for your new fixtures, we strongly recommend scheduling water softener installation alongside the remodel. Installing the softener before trim-out means your new fixtures start their life with conditioned water rather than accumulating scale from day one. The softener installation typically takes 4 hours and can be coordinated to happen during the finish work phase without impacting the tile or paint schedule.
Plumbing Done Right the First Time — Every Phase
A bathroom remodel is only as good as the plumbing behind the tile. Fixtures that aren't properly sloped, supply lines that corrode in hard water, and shower drains that hold water all come back as expensive warranty calls — after the tile is set and the walls are closed. Marlin Plumbing takes a zero-compromise approach to every phase of bathroom plumbing: precise rough-in positioning, correct drain slope, watertight shower pan connections, and fixture specification that accounts for St. George's 15–25 grain per gallon water.
We work directly with general contractors, tile setters, and cabinet installers throughout the remodel process, coordinating our rough-in and trim-out schedules to keep your project on timeline. We also work directly with homeowners who are managing their own remodel. Whether you're converting a tub to a walk-in shower, moving plumbing for a new layout, or installing a freestanding tub with a floor-mount faucet, we've done it throughout Southern Utah.
- Complete bathroom plumbing rough-in for new and relocated fixtures
- Shower drain installation — linear, center, and custom location
- Freestanding tub, soaking tub, and jetted tub installation
- Double vanity supply and drain rough-in
- Toilet rough-in, flange installation, and fixture trim-out
- Hard water-rated fixture specification and installation
Service Details
Quick Info
Typical Cost
$900–$5,500+ (plumbing only)
Timeline
1–4 days depending on scope
Warranty
1-year parts and labor
Know the Warning Signs
Signs You Need Bathroom Remodeling
Catching these early prevents a small issue from becoming a costly emergency.
If you're remodeling and discover moisture under the subfloor near the existing shower or tub drain, the drain connection has failed. This is a mandatory repair before new tile or fixtures are installed — ignoring it will cause the same failure under your new finish materials.
Most angle stop shutoffs under bathroom vanities are only exercised during remodels. Corroded shutoff valves that can't be closed — or that leak when operated — should be replaced before new vanity installation. Discovering this after the new cabinet is in place is avoidable.
Standing water in the shower floor that drains very slowly indicates either an improper original slope toward the drain or a partial blockage. If you're remodeling, now is the time to correct the slope by resetting the liner or adjusting the drain height before new tile.
A rocking toilet indicates a damaged or deteriorated wax ring or a compromised closet flange. The flange condition is critical — if it's cracked, corroded, or set too low in the floor, the new toilet will experience the same problem. Flange assessment and replacement should be part of every bathroom remodel scope.
If high-use bathroom fixtures cause banging in the walls or pressure drops elsewhere in the house, the supply system to the bathroom may be undersized. A remodel is the right time to upgrade supply line sizing or install a pressure-balancing valve — especially before adding a second showerhead or body sprays.
Local Expertise
Bathroom Remodeling Considerations Specific to Southern Utah
St. George's hard water at 15–25 grains per gallon is the most important variable in any bathroom remodel plumbing decision. Grout lines in tile showers mineralize and darken within 2–3 years without a water softener. Chrome-plated fixtures develop spotting and pitting within a similar timeframe. Showerheads clog with mineral deposits, reducing flow pressure, often within the first year. Specifying materials and fixtures designed for hard water — and advising homeowners to install a whole-home softener — is part of every bathroom remodel consultation we conduct.
The desert heat creates an additional consideration: thermal expansion of supply lines. St. George's summer temperatures cause CPVC and PEX supply lines inside exterior walls to expand and contract significantly, which can work fittings loose over time if they weren't installed with adequate movement allowance. Our rough-in technique accounts for this — we don't install rigid connections where flex is needed, and we use expansion-type PEX fittings that accommodate movement without stressing the joint.
Southern Utah's canyon-country lifestyle also shapes remodeling preferences. We see a high rate of walk-in shower additions and soaking tub installations in luxury remodels in Entrada and Coral Canyon, and a consistent demand for ADA-accessible bathroom conversions in Sunbrook and Bloomington Hills as homeowners age in place in desert retirement communities. We've developed expertise in both ends of that spectrum — high-end architectural plumbing and accessible design — and we bring the same code precision to both.
Transparent from Start to Finish
How Our Service Works
Pre-Remodel Assessment and Rough-In Planning
Before demo begins, we assess the existing plumbing condition, map the supply and drain locations, and review the new fixture plan with the homeowner and contractor. We identify any existing deficiencies that need correction, confirm rough-in dimensions for all new fixtures, and provide a detailed plumbing scope and quote.
Demo-Phase Rough-In
Once demo is complete and walls and floors are open, we complete the drain rough-in — setting new drain locations, extending or relocating drain lines, installing the shower drain body, and confirming proper slope throughout. Supply lines are repositioned or extended as needed. All rough-in work is completed before the tile/waterproofing phase begins.
Waterproofing Coordination and Shower Pan
We coordinate with the waterproofing installer or tile contractor for the shower liner or membrane phase, ensuring the drain body is correctly set for the membrane connection. Premature drain connection before proper waterproofing is one of the most common causes of shower failure in remodeled bathrooms — we've seen enough of them to take this step seriously.
Trim-Out and Fixture Installation
After tile, drywall, and painting are complete, we return for trim-out: installing faucets, showerheads, drain covers, toilet, and vanity supply lines. Every fixture is tested for leaks, proper hot/cold operation, and correct flow before we leave. We correct anything that doesn't meet our standard without billing additional labor.
Compare Your Options
Tub-to-Shower Conversion vs. Tub Refresh
One of the most common bathroom remodel decisions in St. George: keep the tub or convert to a walk-in shower. Here's a side-by-side comparison.
Our recommendation: If the bathroom being remodeled is not the last tub in the home, conversion to a walk-in shower often delivers better daily usability and modern aesthetic appeal. If it is the only tub, carefully evaluate the impact on resale value — especially in family-oriented neighborhoods like Little Valley and Bloomington Hills where buyers often require at least one tub.
The Marlin Difference
Why Southern Utah Trusts Marlin
Hard Water Fixture Expertise
We spec fixtures for St. George's water conditions, not for a national average. Ceramic disc cartridges, brass bodies, and non-chrome-plated interior components hold up significantly longer in 15–25 GPG water than standard builder-grade fixtures. Getting the fixture specification right at the start of a remodel prevents warranty calls in year two.
Contractor Coordination and Timeline Reliability
Bathroom remodels live and die by the plumbing schedule. We show up when we say we will, complete rough-in before the tile contractor arrives, and schedule trim-out promptly when the finish work is done. General contractors who work with Marlin regularly cite schedule reliability as the primary reason they keep calling us back.
Code-Compliant Rough-In
Bathroom rough-in tolerances are tighter than most homeowners realize. Toilet flange height, shower drain slope, supply line positioning, and vent connection requirements are all inspected by the city. We do it right the first time — which means no re-inspection costs and no last-minute fixes that delay your tile contractor.
46 Years of Southern Utah Projects
We've plumbed bathrooms in every neighborhood in St. George — from 1970s slab homes in central St. George to new construction in Entrada and luxury remodels in Sunbrook. We know the existing pipe configurations, common issues in each era of construction, and the permit requirements for both full remodels and fixture-only upgrades.
Real Customers, Real Results
What Our Customers Say
“We did a complete primary bath renovation in our Sunbrook home — moved the shower to a new wall, relocated the toilet, added a freestanding tub. Marlin handled all the rough-in and coordinated perfectly with our tile contractor. Zero issues at inspection.”
— Melissa T.
St. George, UT
“Our bathroom remodel contractor recommended Marlin and they completely delivered. The rough-in was done before the tile guys arrived, they came back for trim-out within two days of us calling, and everything was absolutely leak-free on the first check.”
— Brian O.
Hurricane, UT
“Had a pretty complex master bath with a curbless shower, freestanding tub, and double vanity. Marlin spec'd all the fixtures for our hard water and everything has been flawless — the faucets still look new two years later which has never happened in this house.”
— Diane N.
St. George, UT
Real Work, Real Results
Entrada Master Bath: Luxury Remodel with Layout Relocation
The Problem
A homeowner in Entrada undertook a full master bathroom renovation, relocating the shower from one corner to a window-facing wall, adding a freestanding soaking tub, and converting a single vanity to a 72-inch double vanity. The slab-on-grade foundation required cutting and extending the drain rough-in for both the new shower drain location and the freestanding tub drain.
Our Solution
Marlin cut and extended the slab drain, set new drain rough-ins for the shower (linear drain, wall-to-wall) and tub, relocated the toilet flange 18 inches to clear the new vanity footprint, and roughed in supply lines and floor-mount faucet connections for the freestanding tub. All rough-in work passed city inspection on the first review. Trim-out included a complete set of Kohler hard-water-rated fixtures specified for the 18–22 GPG water hardness at this site.
The Result
The completed remodel passed final inspection and the homeowners reported zero fixture issues at the 18-month follow-up. The general contractor cited Marlin's schedule adherence as a key factor in delivering the project on the original timeline despite the complexity of slab work.
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Got Questions?
Bathroom Remodeling FAQ
Answers from our certified technicians — based on the questions St. George homeowners ask most.
It depends on the scope. Replacing like-for-like fixtures (same toilet, same faucet, no relocation) typically doesn't require a permit. Moving drain or supply locations, adding fixtures, or changing the bathroom layout does require a plumbing permit and inspection from the City of St. George. We handle permit applications for all permitted work and schedule city inspections — you don't have to navigate that process.
Bathroom Remodeling Across Southern Utah
Serving St. George and the surrounding Washington County communities since 1978.
Need Bathroom Remodeling?
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