Get matched with top basement leak repair pros in Londonderry, NH
There are 2 highly-rated local basement leak repair pros.
TRUSTED BY HOMEOWNERS
4.6 
42 Basement leak repair pros in Londonderry
Groundworks, previously Busy Dog Basement Technologies, specializes in helping homeowners with their waterproofing, foundation repair, crawl space, and remodeling needs. Our top priority is providing high-quality home repair solutions and personalized service across Massachusetts and Rhode Island. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation or basement.
"Just had ours put in, and it looks great. Our installation team ( Lenny, Terrence, and Manny ) were on time, friendly, hard working and meticulous. Lenny took time to explain things when I popped down and was very patient with questions while working incredibly hard. We have friends who literally live in a swamp who had Busy Dog a couple years ago and their system has worked perfectly. They were getting water in their basement several times a year-- now NOTHING. And I love the technology innovations by this company, the quality of the materials is top notch. Salesman Mike worked with us to set up the construction, he and their engineer came out several times to make sure they understood our tricky set up and worked to get the timing right for timing that worked for us"
Paula C on April 2025
Groundworks, previously Busy Dog Basement Technologies, specializes in helping homeowners with their waterproofing, foundation repair, crawl space, and remodeling needs. Our top priority is providing high-quality home repair solutions and personalized service across Massachusetts and Rhode Island. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation or basement.
"Just had ours put in, and it looks great. Our installation team ( Lenny, Terrence, and Manny ) were on time, friendly, hard working and meticulous. Lenny took time to explain things when I popped down and was very patient with questions while working incredibly hard. We have friends who literally live in a swamp who had Busy Dog a couple years ago and their system has worked perfectly. They were getting water in their basement several times a year-- now NOTHING. And I love the technology innovations by this company, the quality of the materials is top notch. Salesman Mike worked with us to set up the construction, he and their engineer came out several times to make sure they understood our tricky set up and worked to get the timing right for timing that worked for us"
Paula C on April 2025
Total Basement Finishing, A Blackdog Affiliate serves the Greater Lowell area of Massachusetts and New Hampshire with basement finishing and basement remodeling. Finishing your previously unused basement gives you additional space in your home and so much more. It offers you a rare opportunity to exploit your creative side through the design process. And ultimately, you will transform a dark, uninviting space into a room that adds value and comfort to your home, making it an integral part of your family’s daily life.
Total Basement Finishing, A Blackdog Affiliate serves the Greater Lowell area of Massachusetts and New Hampshire with basement finishing and basement remodeling. Finishing your previously unused basement gives you additional space in your home and so much more. It offers you a rare opportunity to exploit your creative side through the design process. And ultimately, you will transform a dark, uninviting space into a room that adds value and comfort to your home, making it an integral part of your family’s daily life.
Mana Wall LLC is a premier provider of remodeling and deck services, specializing in transforming residential and commercial spaces with expert craftsmanship. Whether you're looking to renovate your kitchen, bathroom, or create the perfect outdoor living area with a custom deck, our skilled team delivers high-quality results tailored to your vision. From design to completion, Mana Wall LLC ensures attention to detail, superior materials, and a commitment to customer satisfaction. Trust us to enhance the functionality and beauty of your property with our exceptional remodeling and deck services. Call or 'click' for a FREE estimate today!
Mana Wall LLC is a premier provider of remodeling and deck services, specializing in transforming residential and commercial spaces with expert craftsmanship. Whether you're looking to renovate your kitchen, bathroom, or create the perfect outdoor living area with a custom deck, our skilled team delivers high-quality results tailored to your vision. From design to completion, Mana Wall LLC ensures attention to detail, superior materials, and a commitment to customer satisfaction. Trust us to enhance the functionality and beauty of your property with our exceptional remodeling and deck services. Call or 'click' for a FREE estimate today!
Erickson Foundation Solutions is your local expert for ALL THINGS BASEMENTY! We specialize in basement waterproofing, foundation and crawl space repair, sump pump installation and maintenance, concrete lifting & leveling, as well as radon mitigation. When it comes to problems or ongoing issues in your basement, we offer permanent solutions! We are a family owned business that began in 1979, proudly serving New Hampshire, Massachusetts, and Rhode Island.
"They did a fantastic job! We have had driving rain since the installation and our basement is bone dry. They came on time, were very polite and I'm very happy with the fast train system they installed."
Chris T on November 2021
Erickson Foundation Solutions is your local expert for ALL THINGS BASEMENTY! We specialize in basement waterproofing, foundation and crawl space repair, sump pump installation and maintenance, concrete lifting & leveling, as well as radon mitigation. When it comes to problems or ongoing issues in your basement, we offer permanent solutions! We are a family owned business that began in 1979, proudly serving New Hampshire, Massachusetts, and Rhode Island.
"They did a fantastic job! We have had driving rain since the installation and our basement is bone dry. They came on time, were very polite and I'm very happy with the fast train system they installed."
Chris T on November 2021
Dedicated to excellence with every job we undertake. Our commitment to quality craftsmanship and outstanding customer service sets us apart. Browse our services and get in touch today to schedule your free estimate. Experience the superior service you deserve!
"Highly recommend Copper&Oak! They have been fantastic to work with- an awesome team - very professional and excellent work has been done. Happy to chat 1:1 about our experience."
Becky M on May 2025
Dedicated to excellence with every job we undertake. Our commitment to quality craftsmanship and outstanding customer service sets us apart. Browse our services and get in touch today to schedule your free estimate. Experience the superior service you deserve!
"Highly recommend Copper&Oak! They have been fantastic to work with- an awesome team - very professional and excellent work has been done. Happy to chat 1:1 about our experience."
Becky M on May 2025
We are a Residential Remodeling Contractor that is committed to providing homeowners with the highest quality service and the strongest, long lasting results. If you are looking for premium products that provide beautiful outcomes look no further than SJ Design & Construction. Give us a call or click for an estimate today! Check us out on IG, TikTok and Facebook @sjdesignconstruction
"They were a pleasure to work with and made the process stress free. Did an amazing job!"
Charles H on November 2023
We are a Residential Remodeling Contractor that is committed to providing homeowners with the highest quality service and the strongest, long lasting results. If you are looking for premium products that provide beautiful outcomes look no further than SJ Design & Construction. Give us a call or click for an estimate today! Check us out on IG, TikTok and Facebook @sjdesignconstruction
"They were a pleasure to work with and made the process stress free. Did an amazing job!"
Charles H on November 2023
Groundworks, previously Rescon Basement Solutions, specializes in helping homeowners with their foundation repair, basement waterproofing, and crawl space encapsulation needs. Our top priority is providing high-quality home repair solutions and personalized service across New Hampshire and Massachusetts. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation or basement.
"We started having water leaks on a basement wall. Started slow but increased. We made the mistake of calling the big name TC H......, waited weeks to schedule first appointment. Finally showed up and proposed major excavation of basement wall, then applying new membrane. Unfortunately in our house, every external connection arrives via that wall. Talking electric, cable, septic, well water, and sprinkler. They wanted to use excavator to dig but wouldn't take responsibility for any potential damage. Price tag was very high. I was very nervous about this of course. I saw one source of water was around well pipe and other was wall itself. Contacted Marquis Well in Sanford who showed up immediately. Proposed hand digging at a lower price. They scheduled quickly, hand dug all the dirt, found Crack in water pipe casing and sealed up. But wall still had issue. Searched further and found Groundworks, lots of positive reviews. Called and they arrived quickly to assess. Beth is a true professional who knows her business extremely well. We signed proposal to inject sealant into cracks from inside of wall. Josh arrived to perform the work. He was effecient, very experienced who knew exactly what to do. During his inspection, he recommended bypassing one of the smaller Crack where water was never seen, thereby reducing our costs....unheard of! He completed the work quickly, zero mess or damage to our house. I cannot recommend both of these companies any higher. Both were outstanding in every aspect. Don't fall for the big ads from the others!"
RICH S on May 2025
Groundworks, previously Rescon Basement Solutions, specializes in helping homeowners with their foundation repair, basement waterproofing, and crawl space encapsulation needs. Our top priority is providing high-quality home repair solutions and personalized service across New Hampshire and Massachusetts. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation or basement.
"We started having water leaks on a basement wall. Started slow but increased. We made the mistake of calling the big name TC H......, waited weeks to schedule first appointment. Finally showed up and proposed major excavation of basement wall, then applying new membrane. Unfortunately in our house, every external connection arrives via that wall. Talking electric, cable, septic, well water, and sprinkler. They wanted to use excavator to dig but wouldn't take responsibility for any potential damage. Price tag was very high. I was very nervous about this of course. I saw one source of water was around well pipe and other was wall itself. Contacted Marquis Well in Sanford who showed up immediately. Proposed hand digging at a lower price. They scheduled quickly, hand dug all the dirt, found Crack in water pipe casing and sealed up. But wall still had issue. Searched further and found Groundworks, lots of positive reviews. Called and they arrived quickly to assess. Beth is a true professional who knows her business extremely well. We signed proposal to inject sealant into cracks from inside of wall. Josh arrived to perform the work. He was effecient, very experienced who knew exactly what to do. During his inspection, he recommended bypassing one of the smaller Crack where water was never seen, thereby reducing our costs....unheard of! He completed the work quickly, zero mess or damage to our house. I cannot recommend both of these companies any higher. Both were outstanding in every aspect. Don't fall for the big ads from the others!"
RICH S on May 2025
i have over twenty-eight years of experience in architectural practice and construction. I have extensive knowledge in commercial and residential building design, including but not limited to providing leadership and representation in zoning and building permits issues, sharing responsibility for the production of construction documents and contract administration and supervision of the projects. I am involved in all aspects of construction including estimating and the supervision and direction of subcontractors for Classical Homes, LLC.
"Hossein Vahedi of CLASSICAL HOMES LLC designed our house and supervised the construction process. He was friendly and easy to work with, had many creative ideas, and really tried to understand our needs. He worked well with our general contractor. His price is very reasonable. I highly recommend him to people who want to create their own dream house, but need professional help to translate their ideas to doable project."
Xiru Z on August 2022
i have over twenty-eight years of experience in architectural practice and construction. I have extensive knowledge in commercial and residential building design, including but not limited to providing leadership and representation in zoning and building permits issues, sharing responsibility for the production of construction documents and contract administration and supervision of the projects. I am involved in all aspects of construction including estimating and the supervision and direction of subcontractors for Classical Homes, LLC.
"Hossein Vahedi of CLASSICAL HOMES LLC designed our house and supervised the construction process. He was friendly and easy to work with, had many creative ideas, and really tried to understand our needs. He worked well with our general contractor. His price is very reasonable. I highly recommend him to people who want to create their own dream house, but need professional help to translate their ideas to doable project."
Xiru Z on August 2022
We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!
We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!
General Contracting, Remodeling, New Home Construction. Over 50 Years of Industry experience and family owned and operated. Give us a call today to schedule an appointment.
"We had an experience working with Allen Davis builders. Jake was very informative, patient and transparent with our project. Communication was smooth and Jake went beyond expectations. I would suggest Allen Davis builders to anyone and would use their services again In the future."
Rob S on June 2024
General Contracting, Remodeling, New Home Construction. Over 50 Years of Industry experience and family owned and operated. Give us a call today to schedule an appointment.
"We had an experience working with Allen Davis builders. Jake was very informative, patient and transparent with our project. Communication was smooth and Jake went beyond expectations. I would suggest Allen Davis builders to anyone and would use their services again In the future."
Rob S on June 2024
Basement leak repair services FAQs
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.
Get our Angi-powered app
