They came out on a Sunday which was nice, but they made assumptions about the cause of the leak and all they did was very poorly caulk a few spots, charged me $500, and the area still leaked. After repeated texts to the company they still haven't emailed or left a voicemail to return. $500 is...

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There are 3 highly-rated local basement leak repair pros.
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TRUSTED BY UNION, SC HOMEOWNERS
4.6
Average homeowner rating24
Verified basement leak repair services reviews
Verified Reviews for Basement Leak Repair pros in Union, SC
Last update on October 11, 2025
- Daniel A.
- Pang S.
they spent time looking for the leak and confirmed that everything was good
- Dixon W.
CB Smith recently replaced/updated our water supply lines and plumbing system within our basement. They were a pleasure to work with and completed the work for a reasonable price.
- Chris H.
Excellent work. Showed up right on time, and fixed the problem pretty quickly. Also gave me some additional advice regarding our basement.
- Bill H.
At first I thought all was well and never inspected where I knew a vent was leaking. This was discussed when the tech was here and he assured me it was taken care of so I trusted him and never re inspected. Did so today because of the recent rain and saw that it wasn't caulked correctly and...
- Catherine B.
Thompson Brothers did an excellent job waterproofing our basement. They dug down 12 feet around 3 sides of the house, put in French drains, put "rubber coating" on the exterior walls, routed the water to the back of the lot, filled in the "moat", and leveled the soil. Lastly, they put out...
- Will F.
Good, so far no leaks. They were very responsive and professional. I will use them again.
- Jeff F.
"Al" from DASCOR came out yesterday for a difficult bathroom leak which 3 other plumbers could not figure out, and today all fixed at a good cost. Wow !!
Find Basement leak repair pros in Union

Mount Valley Foundation Services
Mount Valley Foundation Services
Established in 1986, Mount Valley Foundation Service stands as a trusted subsidiary of Groundworks, a distinguished family of companies renowned for delivering unparalleled solutions. From foundation repair, structural reinforcement, crawl space encapsulation, basement waterproofing, and concrete lifting, we provide comprehensive services tailored to meet your needs. With our coverage spanning across the state of South Carolina, we bring our local expertise closer to you. MVFS proudly holds accreditation from the Better Business Bureau, a testament to our unwavering commitment to excellence. Drawing from decades of collective experience, extensive industry knowledge, and ongoing specialized training, our dedicated team is poised to safeguard your residential property against water damage, concrete sinking, and foundation instability. At MVFS, we are not just builders; we are guardians of your peace of mind. Contact us today for a FREE estimate!
"From my first Mount Valley Foundations evaluation appointment with Carlton Cisson to the construction team assigned to reconstructing and encapsulating my grusome crawl space foundation mess (Shaun Dixon, Alex Hernandez, Milton Martin and Dre Nesbitt) I experienced nothing but professionalism, positive & friendly demeanors, constant and thorough communication and a completed job above my expectations! Hoping I never have to have such foundation work ever done again, but will certainly call Mount Valley again, if I do!"
Brett W on June 2024
Established in 1986, Mount Valley Foundation Service stands as a trusted subsidiary of Groundworks, a distinguished family of companies renowned for delivering unparalleled solutions. From foundation repair, structural reinforcement, crawl space encapsulation, basement waterproofing, and concrete lifting, we provide comprehensive services tailored to meet your needs. With our coverage spanning across the state of South Carolina, we bring our local expertise closer to you. MVFS proudly holds accreditation from the Better Business Bureau, a testament to our unwavering commitment to excellence. Drawing from decades of collective experience, extensive industry knowledge, and ongoing specialized training, our dedicated team is poised to safeguard your residential property against water damage, concrete sinking, and foundation instability. At MVFS, we are not just builders; we are guardians of your peace of mind. Contact us today for a FREE estimate!
"From my first Mount Valley Foundations evaluation appointment with Carlton Cisson to the construction team assigned to reconstructing and encapsulating my grusome crawl space foundation mess (Shaun Dixon, Alex Hernandez, Milton Martin and Dre Nesbitt) I experienced nothing but professionalism, positive & friendly demeanors, constant and thorough communication and a completed job above my expectations! Hoping I never have to have such foundation work ever done again, but will certainly call Mount Valley again, if I do!"
Brett W on June 2024

Uneven Floor Solutions LLC
Uneven Floor Solutions LLC
At Uneven Floor Solutions, we have 15 years of experience fixing un-level floors. We do offer FREE general inspections related to un-level floors. We can find what is causing the problem; whether it be the foundation, rotten wood, water or any other problems. Additional services offer include basement waterproofing and concrete crack repair! We are available anytime, even weekends. You can make your own schedule. We are here to be of service to you!
"Masle Franciso and his team did some excellent work on my house that needed some floors re-leveled as well as crawl space water proofing. They took the extra time and effort to make sure I was fully satisfied with the job and even added some additional features at no extra cost. Extremely good value for the price I paid, I highly recommend them."
Marcus A on February 2025
At Uneven Floor Solutions, we have 15 years of experience fixing un-level floors. We do offer FREE general inspections related to un-level floors. We can find what is causing the problem; whether it be the foundation, rotten wood, water or any other problems. Additional services offer include basement waterproofing and concrete crack repair! We are available anytime, even weekends. You can make your own schedule. We are here to be of service to you!
"Masle Franciso and his team did some excellent work on my house that needed some floors re-leveled as well as crawl space water proofing. They took the extra time and effort to make sure I was fully satisfied with the job and even added some additional features at no extra cost. Extremely good value for the price I paid, I highly recommend them."
Marcus A on February 2025

Falcone Crawl Space & Structural Repair
Falcone Crawl Space & Structural Repair
Falcone Crawl Space & Structural Repair is a local, family-owned business providing customers in North and South Carolina foundation repair, structural repair, and waterproofing services since 2006. We are a licensed General Contactor and offer free consultations and estimates.
"Rex, gave our estimate and took care with explaining everything to me, he was genuine. Eric managed and worked on the project, he was professional and made my daughters and I feel extremely comfortable and confident. He kept us informed in every part of the job. Freddie was really friendly and helpful as well. They did an amazing job and took great care with our home. I highly recommend hiring falcone."
Julie W on July 2022
Falcone Crawl Space & Structural Repair is a local, family-owned business providing customers in North and South Carolina foundation repair, structural repair, and waterproofing services since 2006. We are a licensed General Contactor and offer free consultations and estimates.
"Rex, gave our estimate and took care with explaining everything to me, he was genuine. Eric managed and worked on the project, he was professional and made my daughters and I feel extremely comfortable and confident. He kept us informed in every part of the job. Freddie was really friendly and helpful as well. They did an amazing job and took great care with our home. I highly recommend hiring falcone."
Julie W on July 2022
Calvin Bray Quality Construction
Calvin Bray Quality Construction
With over 23 years of professional general contracting experience, we are here to address any renovation or remodeling need you may have.
"Exactly what I wanted with exceptional craftsmanship on our custom screened in porch and custom made Porch Swing."
Jim K on February 2024
With over 23 years of professional general contracting experience, we are here to address any renovation or remodeling need you may have.
"Exactly what I wanted with exceptional craftsmanship on our custom screened in porch and custom made Porch Swing."
Jim K on February 2024

Cransten Service All Stars
Cransten Service All Stars
Cransten is the best handyman and remodeling experience in the US. Our team is vetted, trained, background checked, and amazing at what we do. We are licensed and insured. Get a free quote from us today and see what we can do to help create your dream home!
"Seemed very nice on the phone but when I went to hire them I would of had to wait almost 6 to 8 weeks because they were totally booked out. So figured they must really have a great business just was sorry i couldn't wait."
Christina C on September 2025
Cransten is the best handyman and remodeling experience in the US. Our team is vetted, trained, background checked, and amazing at what we do. We are licensed and insured. Get a free quote from us today and see what we can do to help create your dream home!
"Seemed very nice on the phone but when I went to hire them I would of had to wait almost 6 to 8 weeks because they were totally booked out. So figured they must really have a great business just was sorry i couldn't wait."
Christina C on September 2025

'58 Foundations
'58 Foundations
For over 66 years, '58 Foundations & Waterproofing has provided the highest-quality basement waterproofing, crawl space encapsulation, foundation repair, and mold removal. We lead with a promise of Trusted Five-Star Service, which means the customer experience is at the center of everything we do. Since 1958, we have been steadfast in keeping this promise and upholding the values upon which '58 Foundations & Waterproofing was built: trust, teamwork, integrity, respect, and communication. From the initial call to job completion, our customers are met with knowledgeable, caring, and professional staff prepared to offer a five-star experience that is unmatched in the home repair industry. What’s more, you can enjoy the peace of mind that comes with our lifetime warranty and our industry-unique money-back guarantee!
"The work crew's foreman Aaron was very professional and extremely knowledgeable. His crewmembers Rusty, Otis, and Dizzy, all worked very hard and efficiently 2 remove the old and unnecessary insulation and Black netting that was causing moisture build up in my crawlspace. They removed all the debris, cleaned up the work area, and left my crawlspace looking beautiful , and moisture free! I would highly recommend '58 Foundation! Their prices also beat their competitors by thousands of dollars! I am very satisfied with the work ethic of this Company!"
SUSAN F on September 2023
For over 66 years, '58 Foundations & Waterproofing has provided the highest-quality basement waterproofing, crawl space encapsulation, foundation repair, and mold removal. We lead with a promise of Trusted Five-Star Service, which means the customer experience is at the center of everything we do. Since 1958, we have been steadfast in keeping this promise and upholding the values upon which '58 Foundations & Waterproofing was built: trust, teamwork, integrity, respect, and communication. From the initial call to job completion, our customers are met with knowledgeable, caring, and professional staff prepared to offer a five-star experience that is unmatched in the home repair industry. What’s more, you can enjoy the peace of mind that comes with our lifetime warranty and our industry-unique money-back guarantee!
"The work crew's foreman Aaron was very professional and extremely knowledgeable. His crewmembers Rusty, Otis, and Dizzy, all worked very hard and efficiently 2 remove the old and unnecessary insulation and Black netting that was causing moisture build up in my crawlspace. They removed all the debris, cleaned up the work area, and left my crawlspace looking beautiful , and moisture free! I would highly recommend '58 Foundation! Their prices also beat their competitors by thousands of dollars! I am very satisfied with the work ethic of this Company!"
SUSAN F on September 2023
R&M Building and Remodeling
R&M Building and Remodeling
We Provide High Quality Remodels, Repairs, and Renovations for Residential Homes and Commercial Properties. We also do Custom Deck Design and Construction. Privacy Fences. Patios. Sheds. Siding. Roof Repair. Retaining Walls and other Hard Scapes. We do it all!
We Provide High Quality Remodels, Repairs, and Renovations for Residential Homes and Commercial Properties. We also do Custom Deck Design and Construction. Privacy Fences. Patios. Sheds. Siding. Roof Repair. Retaining Walls and other Hard Scapes. We do it all!
polymatheshvacducts
polymatheshvacducts
We work on Hvac systems, we clean air ducts, dryer vents, crawl space encapsulation, attic insulation, minor HVAC repairs. Chimney repairs and sweeps
We work on Hvac systems, we clean air ducts, dryer vents, crawl space encapsulation, attic insulation, minor HVAC repairs. Chimney repairs and sweeps
Proplan
Proplan
Hello my name is Fabian Quintin at a young age I began working as a Framer carpenter I spent 3 years framing until I decided I wanted to learn more trades in hopes of one day becoming the best builder in the nation so I began by working for a landscaping company and quickly memorized everything I needed to know and moved on to do the same with plumbing, masonry, concrete, drywall, painting, flooring, electrical, HVAC, insulation, foundation work and crawlspace maintenance, interior trim, fence installation or repair, siding and flashing, and finally demolition. Our team has hands on experience in all trades ensuring our skills are at peak performance. We do not believe in using shortcuts or ignorance, we do all projects the right way to ensure customer satisfaction while Everything is done in a timely manner. If anything needs to be added I will speak with you beforehand. Before starting Work I will walk through everything with you to ensure no misunderstandings or mistakes. And most importantly at a affordable price! Let us make your house your perfect home!! Se habla espanol!
Hello my name is Fabian Quintin at a young age I began working as a Framer carpenter I spent 3 years framing until I decided I wanted to learn more trades in hopes of one day becoming the best builder in the nation so I began by working for a landscaping company and quickly memorized everything I needed to know and moved on to do the same with plumbing, masonry, concrete, drywall, painting, flooring, electrical, HVAC, insulation, foundation work and crawlspace maintenance, interior trim, fence installation or repair, siding and flashing, and finally demolition. Our team has hands on experience in all trades ensuring our skills are at peak performance. We do not believe in using shortcuts or ignorance, we do all projects the right way to ensure customer satisfaction while Everything is done in a timely manner. If anything needs to be added I will speak with you beforehand. Before starting Work I will walk through everything with you to ensure no misunderstandings or mistakes. And most importantly at a affordable price! Let us make your house your perfect home!! Se habla espanol!
Back Forty Construction, LLC
Back Forty Construction, LLC
Locally owned and operated. We started this business with one focus in mind and that is customer satisfaction. Top quality work, with a small business price tag. You can guarantee that Back Forty Construction can help with your project!. With being in the construction field for over 15 years, we are experienced to handle all that life might throw at you.
"Andrew was punctual and professional. He arrived early to meet me and walk my project. He provided a timely quote and worked within my budget. The work was performed on time and to my absolute satisfaction. I am having him do further work. Recommend his services highly."
Todd C on August 2025
Locally owned and operated. We started this business with one focus in mind and that is customer satisfaction. Top quality work, with a small business price tag. You can guarantee that Back Forty Construction can help with your project!. With being in the construction field for over 15 years, we are experienced to handle all that life might throw at you.
"Andrew was punctual and professional. He arrived early to meet me and walk my project. He provided a timely quote and worked within my budget. The work was performed on time and to my absolute satisfaction. I am having him do further work. Recommend his services highly."
Todd C on August 2025
FAQs for basement leak repair projects in Union, SC
The cost to finish a basement is $18,400 for the average homeowner. However, this cost could be as little as $2,800 or as much as $34,500, depending on the basement size and the materials needed. If your basement is already outfitted with electrical and plumbing, expect the cost to fall on the lower end.
For example, the drywall cost for this project averages around $1,750, but other features, like hiring a plumber, cost between $45 and $200 per hour.
The cost to remodel a basement is between $12,100 and $33,400 for the average homeowner. The price you pay can be as little as $3,500 or as much as $50,200, depending on the size and condition of your basement and the type of remodel you're doing.
If you're doing a simple project like adding a home office to your basement, you can expect to pay anywhere from $500 to $3,000. However, if you're adding a bathroom, which is an extensive project, you can expect to pay between $6,600 to $16,500.
Damp proofing and waterproofing are both methods to help keep your basement dry. Damp proofing keeps soil moisture from entering your basement, which is helpful since your basement is underground. Waterproofing, however, keeps both soil moisture and liquid water out of the basement, which is essential, especially if you live in a wet environment. Because it’s more protective, waterproofing typically costs more than damp proofing.
Although homeowners often use the terms basement remodeling and basement finishing interchangeably, they are quite different terms.
Finishing a basement is the process of taking a basement space that is not habitable and adding elements to make it usable. This includes adding plumbing, flooring, and insulation.
Remodeling a basement means taking an already existing finished basement and changing it, often by adding or removing walls, adding plumbing, or changing the existing flooring.
The cost of basement waterproofing is $4,950 for the average homeowner. However, you could end up paying between $600 and $14,000, depending on factors like basement size, waterproofing method, and the region you live in.
If you live in an area with heavy rainfall, you might be paying more for waterproofing than if you lived somewhere drier since waterproofing contractors would be in high demand. Likewise, a 500-foot basement costs between $2,500 and $5,000 to waterproof, but that price rises significantly for a larger basement.
The Union, SC homeowners’ guide to basement leak repair services
From average costs to expert advice, get all the answers you need to get your job done.
Crawl space repair costs can seem intimidating, but putting them off can lead to bigger issues. Learn about repair costs in this guide to set your budget.
A basement bar can add value to your home and serve as a great place to entertain. Use this guide on the cost to build a bar in your basement to get started.
The first step toward a cozy finished basement is adding its framing. How much does it cost to frame a basement? Let's break down the numbers.
Finishing a basement isn’t always ideal. Learn about the differences between a finished and unfinished basement and which is right for you.
A finished basement adds valuable living space to your home. Learn how much value a finished basement adds to your home and what affects your return on investment.
Building a flood wall around your house is a worthwhile investment. For superior protection in a flood zone, it’s best to hire a pro to do the work for you.
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