Charleston bathrooms have problems most contractors don't expect. Galvanized supply lines hidden behind plaster in a historic single-house. Active mold in a Folly Beach rental from undersized ventilation. A 1990s Mount Pleasant builder-grade tub-shower combo on a sub-floor that's been quietly rotting for five years. We rebuild bathrooms across the Charleston metro with waterproofing-first sequencing and the kind of subsurface diligence Lowcountry housing actually requires.
The Charleston metro spans roughly four bathroom-remodel realities. Inside the peninsula and the historic district, we're typically working in single-houses with lath-and-plaster walls, often-undersized supply lines, and bathrooms that were carved out of converted spaces decades after original construction. Vintage charm is real, but so is the hidden plumbing scope. In Mount Pleasant, the dominant housing stock is 1980s-2000s production builds where the original bathrooms have aged out of style and out of function. On the sea islands — Folly Beach, Isle of Palms, Sullivan's Island, James Island — vacation-rental wear and humid coastal exposure hit bathrooms harder than anywhere else in the metro.
Charleston's higher year-round humidity and tidal exposure on the sea islands make bathroom waterproofing and ventilation more consequential than they are inland. A bathroom that performs in Greenville won't necessarily perform in Folly Beach. We specify continuous waterproofing membrane behind tile (not just at the wet wall), upgraded exhaust capacity sized to actual room volume rather than a builder-default fan, and stainless or coastal-rated hardware in sea-island installations. The cost difference at install is small. The cost difference at year-five is significant.
Pick a focused upgrade or commit to a full gut renovation. We build around the property's actual condition and your finish selections.
Bathroom rebuilds inside Charleston peninsula homes, including supply-line replacement, plaster repair, and period-appropriate fixture coordination.
Get pricingUpdating 1980s–2000s production builds with modern layouts, tile shower rebuilds, dual-vanity reconfigurations, and finish upgrades.
Get pricingDurable, fast-turnover bathroom renovations for STR properties on Folly Beach, IOP, Sullivan's, and James Island with rental-grade specifications.
Get pricingReplace tubs with walk-in showers; reconfigure drain location, framing, and waterproofing to fit the new footprint.
Get pricingVanity swaps, lighting upgrades, and properly-sized exhaust fans to address the moisture issues older Charleston bathrooms tend to develop.
Get pricingDemolition through final fixtures with coordinated trades, waterproofing, and inspection sequencing.
Start your remodelThe right sequence matters more than the finish selections. Get the rough-in and waterproofing right and the rest holds up.
We assess the bathroom on-site, identify supply-line type, sub-floor condition, ventilation, and any visible signs of moisture issues before scope is finalized.
Tile, fixtures, vanity, lighting, and ventilation aligned to the plan. We confirm lead times early so demolition doesn't outrun material delivery.
Remove finishes, verify framing, sub-floor, and rough plumbing condition. Surface any hidden scope before it stalls the schedule.
New supply lines (PEX or copper), drain reconfiguration, electrical for lighting and exhaust, and ventilation duct routing.
Continuous waterproofing membrane, properly-lapped seams at curbs and niches, then tile installation with clean transitions.
Install fixtures and hardware, complete trim and paint, walk through with you, and finalize warranty documentation.
Most Charleston bathroom problems are environment problems first and design problems second. The metro's combination of high humidity, frequent rain, and (on the sea islands) salt-air exposure puts harder demands on every surface and connection in a bathroom than inland or even Grand Strand projects do. A vanity that performs fine in a dry climate will swell at the toe-kick within 18 months in Folly Beach without proper backing. Ventilation that meets minimum code in Greenville will leave moisture trapped in a James Island bathroom because the fan was sized to the room volume on paper but never to the air-change requirement of a humid coastal envelope.
Inside the peninsula, the bigger issue is what's behind the wall. Charleston's historic single-houses commonly retain galvanized supply lines installed mid-century, undersized DWV (drain-waste-vent) sizing that pre-dates current code, and original lath-and-plaster wall assemblies that limit the diagnostic visibility you'd have in a newer build. We don't open these walls assuming we'll find what was on the listing. We open them assuming we'll find scope that wasn't priced — and we structure our cost-plus billing model to keep that surfaceable rather than buried.
In Mount Pleasant, the dominant scope is updating bathrooms from production-builder spec to current expectations. Layouts that worked in 1995 (small vanity, fiberglass tub-shower combo, oversized linen closet) often don't fit modern use patterns. The win is usually a layout reconfiguration — converting the tub to a curbless shower, expanding the vanity to a dual setup, removing the linen closet for shower depth — rather than just replacing fixtures in place.
Cross-reference our other resources: our bathroom renovation cost guide covers per-project pricing ranges that apply across the Charleston metro, and our kitchen vs bathroom renovation comparison covers ROI considerations for both. For bathroom remodeling in the Grand Strand area instead, see our North Myrtle Beach bathroom remodeling page.
Baldwin Builders holds South Carolina General Contractor License #CLG124644 and carries general liability and workers' compensation insurance on every Charleston-area bathroom remodel.
Common questions about bathroom renovations in the Charleston metro.
Yes. Baldwin Builders manages full bathroom renovations across the Charleston metro — the city of Charleston, Mount Pleasant, James Island, West Ashley, Daniel Island, and the surrounding sea islands. Tell us about your bathroom and we'll outline next steps.
Charleston-area bathroom remodels typically run $15,000 to $25,000 for a cosmetic refresh, $30,000 to $55,000 for a mid-range renovation with tile shower rebuild and new vanity, and $55,000 to $90,000+ for a full gut remodel. Older Charleston homes often surface unforeseen scope (lath-and-plaster, galvanized supply lines, undersized DWV) that can add 10-20%. See our full bathroom renovation cost guide.
Interior bathroom work inside historic single-houses generally does not require BAR review unless the project alters exterior windows, doors, fenestration, or visible roof elements. Plumbing and electrical permits are still required, and work that affects load-bearing walls or removes original interior elements may require additional review. We coordinate with the city of Charleston permitting staff before scope is finalized.
Yes. We routinely renovate bathrooms in short-term and long-term rental properties on Folly Beach, Isle of Palms, Sullivan's Island, and James Island. For STR properties we phase work to minimize booking gaps where possible, and we specify materials rated for the heavier wear and humidity exposure that vacation properties experience.
Two main differences: (1) Charleston's older housing stock (especially historic single-houses inside the peninsula) often has galvanized supply lines, cast-iron DWV, and lath-and-plaster walls that change scope and budget vs newer Grand Strand construction; (2) Charleston's higher humidity and tidal exposure on the sea islands drives more aggressive ventilation, waterproofing, and hardware specs than typical North Myrtle Beach bathroom remodeling.
Dan Renne
"We recently had our bathroom completely remodeled by Baldwin Builders, and they did an absolutely amazing job! From the initial consultation to the final walkthrough, the entire team was professional, communicative, and attentive to every detail. They stayed on schedule, kept the worksite clean every day, and minimized disruptions to our home. We couldn’t be happier with the results and highly recommend Baldwin Builders!!"
Tina Gibbins
"We were referred to Baldwin Builders by a friend and are so pleased. Our newly purchased vacation condo needed to be completely painted, bedroom flooring replaced to match existing, a new kitchen fixture and desk area built. George walked the property, gave great suggestions and had a proposal to us in a few days. His communication with calls and photos and his responsiveness was fantastic. They matched the existing flooring perfectly and made my workspace vision come to fruition. If you want quality work done, call Baldwin Builders."
Bill Baker
"We recently purchased an older home in SC knowing some work would be required before leaving our home state. We turned to our many long-term acquaintances in the area for contractor recommendations. Repeatedly, Baldwin Builders came up on the top of every list. Baldwin Builders was sensitive to our absence during the project and contacted us almost daily with project status and solutions to any unforeseen challenges. I would characterize Baldwin Builders as a company of uncompromising integrity and pro-active communicators."
Phillip Wisdom
"Baldwin Builders recently remodeled our bathrooms, and we couldn’t be happier with the outcome. From the initial consultation to the final walkthrough, their team was professional, responsive, and detail-oriented. They helped us choose modern fixtures, updated the flooring, and improved the overall layout. The transformation is incredible—our bathrooms now feel like a high-end spa. Highly recommend Baldwin Builders for any remodeling needs!"
Vincent Padavano
"I have nothing but great things to say about Baldwin Builders. I had a guest bathroom remodel done by them and it turned out amazing. They paid attention to detail, cleanliness and finished the job within a short/appropriate amount of time. I would definitely recommend this young, professional, up-incoming business to anyone for home repair/updating needs."
Thomas Veith
"I hired Baldwin Builders to do a full renovation on my beach vacation rental and have nothing but great things to say. Their head sales guy, George, was with me through the entire project displaying perfect communication. He went above and beyond to hold everyone accountable and shared my vision as if it was his own. Larson, the owner, delivered my estimate and acted in my best interest throughout the entire project displaying honesty and transparency."
James Moye
"George is extremely accommodating & professional. Great communication! Also met with his brother Larson. Nice guy & it’s very impressive they created such an excellent business together. I needed a sub floor from recent demo go bad & they got on it & handled so quick. I’m continuing my relationship with these 2 brothers & crew."
Thomas Neat
"I don’t know where to begin explaining how happy I am with my sunroom. It was a screened porch and I said I wanted a room to use all year round with a view of the pond behind me. Beyond my expectations. George, Larson, and crew worked fast, kept me up to date, treated my family and even my pets with respect. I will not hesitate to call them if I have another project."
Andrew Zaloom
"I could not be happier with the quality and service that both Larson and George provided. From the initial consultation to delivery, they were thorough, honest, and attentive. Within a few days, they were able to do an extensive door replacement and structural repair. I own several rental properties in the area and this was the first group I’ve worked with that did not over promise and under deliver."
Gina Thomas
"After building a new house and being left without shower doors for our walk in luxury tile shower it was a major burden. We researched and looked for a couple of weeks to find a builder to install shower doors and Baldwin Builders came in showed us our options for our price range. Larson is extremely efficient and knowledgeable. The installation was easy and perfection. If you are looking for a contractor who cares and is professional, Baldwin Builders is your company."
Ed Cristina
"Hired Baldwin Builders last minute to build a staircase for my porch. We needed it done quickly. I gave them pictures on a Friday and it was DONE Monday!! AND it was absolutely perfect; exactly what we wanted and hundreds less than the other 2 companies we called. Ask for George or Larson: both were great!!"
Baldwin Builders remodels bathrooms across Charleston County — peninsula single-houses, Mt. Pleasant homes, and James Island sea-island retreats. Galvanized supply lines, tile work, and walk-in shower conversions handled end-to-end.
