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TRUSTED BY DELAWARE, NJ HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon31
    Verified basement waterproofing services reviews

Verified Reviews for Basement Waterproofing pros in Delaware, NJ

*The Angi rating for Basement Waterproofing companies in Delaware, NJ is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

*The HomeAdvisor rating for Basement Waterproofing companies in Delaware, NJ is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

Last update on October 31, 2025

Find Basement waterproofing pros in Delaware

Avatar for Quality 1st Basement Systems

Quality 1st Basement Systems

359 RT-35
4.51(
289
)
•Approved Pro

Quality 1st Basement Systems

359 RT-35
4.51(
289
)
•Approved Pro
Customers say: Super punctual
302 local quotes requested
39 years of experience

Quality 1st Basement Systems has been helping homeowners improve their homes for over 20 years. We have currently helped over 6,000 homeowners with All Things Basementy by designing effective solutions for their home’s needs. Whether our homeowners are interested in waterproofing a wet basement, fixing cracked foundation walls, insulating their crawl spaces, finishing their basements with mold-resistant materials, and raising concrete slabs, we can help! We’re currently the largest waterproofing company serving both residential and commercial clients in the tri-state area and are continuing to grow. As a member of the internationally renowned Basement Systems, Inc. network and Foundation Supportworks, Inc. network, we have global resources, but provide local service! The Basement Systems network thoroughly trains our employees at the Basement Systems, Inc. corporate headquarters in CT. Our hard work and dedication to our customers have earned us an A+ rating with the Better Business Bureau and several Super Service Awards from Angie’s List. We service most of New Jersey, all 5 boroughs of New York City and certain parts of Pennsylvania. Thousands of homeowners have experienced the Quality 1st Basement Systems difference. We invite you to do your homework and check out our credentials and compare. Put our experience and integrity to work protecting your investment. Our reputation exceeds all others because of our culture of WOW customer service.

"Everything went smoothly"

Hector R on December 2023

Quality 1st Basement Systems has been helping homeowners improve their homes for over 20 years. We have currently helped over 6,000 homeowners with All Things Basementy by designing effective solutions for their home’s needs. Whether our homeowners are interested in waterproofing a wet basement, fixing cracked foundation walls, insulating their crawl spaces, finishing their basements with mold-resistant materials, and raising concrete slabs, we can help! We’re currently the largest waterproofing company serving both residential and commercial clients in the tri-state area and are continuing to grow. As a member of the internationally renowned Basement Systems, Inc. network and Foundation Supportworks, Inc. network, we have global resources, but provide local service! The Basement Systems network thoroughly trains our employees at the Basement Systems, Inc. corporate headquarters in CT. Our hard work and dedication to our customers have earned us an A+ rating with the Better Business Bureau and several Super Service Awards from Angie’s List. We service most of New Jersey, all 5 boroughs of New York City and certain parts of Pennsylvania. Thousands of homeowners have experienced the Quality 1st Basement Systems difference. We invite you to do your homework and check out our credentials and compare. Put our experience and integrity to work protecting your investment. Our reputation exceeds all others because of our culture of WOW customer service.

"Everything went smoothly"

Hector R on December 2023

Avatar for Groundworks

Groundworks

2624 Hamilton Blvd
4.57(
225
)
•Approved Pro

Groundworks

2624 Hamilton Blvd
4.57(
225
)
•Approved Pro
Customers say: Super punctual
55 local quotes requested
21 years of experience

Established in 2004, Groundworks is 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 New Jersey, we bring our local expertise closer to you. Groundworks 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 Groundworks, we are not just builders; we are guardians of your peace of mind. Contact us today for a FREE estimate! 13VH11822900 (NJ)

"Working with DJ from Groundworks (Select Basement) has been an outstanding experience. After struggling with various contractors who either failed to resolve our water issues or were unprofessional, DJ and his team truly stood out. DJ was incredibly helpful, patient, and responsive throughout the entire process. Our home is a ranch with 225 linear feet around the perimeter, and while other contractors insisted on installing a French drain for the entire length, DJ recommended a more targeted approach. He proposed installing the French drain for just 80 linear feet, focusing only on the areas where water intrusion was likely. His thorough explanations and prompt responses to all our questions were greatly appreciated. The workers arrived on time, maintained a clean work environment, and completed the job as promised. If we could give 10 stars, we would! Groundworks is a highly professional and honest company that didn't try to inflate the scope of work to charge us more. We wholeheartedly recommend them."

Elina B on October 2024

Established in 2004, Groundworks is 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 New Jersey, we bring our local expertise closer to you. Groundworks 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 Groundworks, we are not just builders; we are guardians of your peace of mind. Contact us today for a FREE estimate! 13VH11822900 (NJ)

"Working with DJ from Groundworks (Select Basement) has been an outstanding experience. After struggling with various contractors who either failed to resolve our water issues or were unprofessional, DJ and his team truly stood out. DJ was incredibly helpful, patient, and responsive throughout the entire process. Our home is a ranch with 225 linear feet around the perimeter, and while other contractors insisted on installing a French drain for the entire length, DJ recommended a more targeted approach. He proposed installing the French drain for just 80 linear feet, focusing only on the areas where water intrusion was likely. His thorough explanations and prompt responses to all our questions were greatly appreciated. The workers arrived on time, maintained a clean work environment, and completed the job as promised. If we could give 10 stars, we would! Groundworks is a highly professional and honest company that didn't try to inflate the scope of work to charge us more. We wholeheartedly recommend them."

Elina B on October 2024

Avatar for Century Masonry & Waterproofing

Century Masonry & Waterproofing

753 County Road 565 #b
4.94(
62
)
•Approved Pro

Century Masonry & Waterproofing

753 County Road 565 #b
4.94(
62
)
•Approved Pro
Customers say: Quality work
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
29 years of experience

Water control, drain systems, sump pumps, battery back-up pumps, crawl space encapsulation & wall repair. Additional email - [email protected]. Additional email - [email protected]

"Very happy with the service and the concrete work provided by Sean and his crew. He was able to meet a strict schedule and was helpful answering my questions and offered smart solutions. In the end, the job was done on time, correctly and I am extremely pleased overall. Thank you, Sean and Century Masonry for making it look easy and doing a great job!!"

Mike C on November 2024

Water control, drain systems, sump pumps, battery back-up pumps, crawl space encapsulation & wall repair. Additional email - [email protected]. Additional email - [email protected]

"Very happy with the service and the concrete work provided by Sean and his crew. He was able to meet a strict schedule and was helpful answering my questions and offered smart solutions. In the end, the job was done on time, correctly and I am extremely pleased overall. Thank you, Sean and Century Masonry for making it look easy and doing a great job!!"

Mike C on November 2024

Basement Waterproofing Specialists

127 2nd Avenue
4.32(
442
)
•Approved Pro

Basement Waterproofing Specialists

127 2nd Avenue
4.32(
442
)
•Approved Pro
Customers say: Quality work
184 local quotes requested
16 years of experience

Our personnel make up the complete collection of the best in the industry with decades of experience. We are a small family-owned business, not a giant corporation. We treat you like family and that's the difference! We pride ourselves on being the most professional family-owned business in our industry. We employee the highest caliber employees and use the best quality products available. We are fully licensed Home Improvement Contractors in every state we serve with the goal of leading the forefront of innovation in all that we do and setting the standard in this trade. We were the first to: Conduct mold remediation while simultaneously waterproofing. Offer lifetime warranties for our waterproofing services for the life of the structure. Offer lifetime warranties for the sump pumps. (We know they will not last a lifetime; it is a free replacement for our customers and our appreciation of their business). Clean out basement crawlspaces and garages while waterproofing.

"The job inside was done. However the drainage put in outside has turned our yard into a swimming pool. We once had a pipe draining to the creek and this was a perfect solution to the rains/weather. These guys came in and put a round small cylinder well. Water pumps up into our yard turning it into a swamp. Called them to come and see the problem they created. Their response $2900 to fix THEIR DAMAGE. I WOULD NEVER RECCOMEND THIS COMPANY!!"

Mike F on June 2025

Our personnel make up the complete collection of the best in the industry with decades of experience. We are a small family-owned business, not a giant corporation. We treat you like family and that's the difference! We pride ourselves on being the most professional family-owned business in our industry. We employee the highest caliber employees and use the best quality products available. We are fully licensed Home Improvement Contractors in every state we serve with the goal of leading the forefront of innovation in all that we do and setting the standard in this trade. We were the first to: Conduct mold remediation while simultaneously waterproofing. Offer lifetime warranties for our waterproofing services for the life of the structure. Offer lifetime warranties for the sump pumps. (We know they will not last a lifetime; it is a free replacement for our customers and our appreciation of their business). Clean out basement crawlspaces and garages while waterproofing.

"The job inside was done. However the drainage put in outside has turned our yard into a swimming pool. We once had a pipe draining to the creek and this was a perfect solution to the rains/weather. These guys came in and put a round small cylinder well. Water pumps up into our yard turning it into a swamp. Called them to come and see the problem they created. Their response $2900 to fix THEIR DAMAGE. I WOULD NEVER RECCOMEND THIS COMPANY!!"

Mike F on June 2025

Avatar for Groundworks

Groundworks

2624 Hamilton Blvd.
4.84(
64
)
•Approved Pro

Groundworks

2624 Hamilton Blvd.
4.84(
64
)
•Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
230 local quotes requested

Groundworks offers dependable foundation and crawl space repair solutions, basement waterproofing, and concrete lifting for New Jersey residents. We take pride in restoring the value and safety of homes in our local community.

"We paid close to $20,000 to BQ Basements to completely waterproof our basement. We still get water and they told us we need another sump pump installed at over $2,000. They guaranteed we would not get water after installation. Be aware they do not stand behind their work or honor warranties."

Robert K on October 2025

Groundworks offers dependable foundation and crawl space repair solutions, basement waterproofing, and concrete lifting for New Jersey residents. We take pride in restoring the value and safety of homes in our local community.

"We paid close to $20,000 to BQ Basements to completely waterproof our basement. We still get water and they told us we need another sump pump installed at over $2,000. They guaranteed we would not get water after installation. Be aware they do not stand behind their work or honor warranties."

Robert K on October 2025

Avatar for Restored NJ

Restored NJ

229 Somerset Street
4.97(
18
)
•Approved Pro

Restored NJ

229 Somerset Street
4.97(
18
)
•Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
10 local quotes requested

Restored NJ is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"My deck never looked better. The crew came early and worked hard every day. We are very satisfied with the job. Will certainly get in touch for our next project. "

AnneMarie F on May 2025

Restored NJ is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"My deck never looked better. The crew came early and worked hard every day. We are very satisfied with the job. Will certainly get in touch for our next project. "

AnneMarie F on May 2025

Avatar for Solution House Remodeling LLC

Solution House Remodeling LLC

227 N 9th St
3.86(
7
)

Solution House Remodeling LLC

227 N 9th St
3.86(
7
)
Customers say: Quick response
78 local quotes requested

We have the experience and dedication to bring your dreams to reality! Specializing in Remodeling, we guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click to schedule a free estimate today!

"The company represented to be competent and experienced at bathroom remodeling however the worker, Joel was not able to complete the job efficiently. He installed a shower liner over a shower body which he had improperly installed which caused leaks and a situation where we had to break through a wall to get to the improperly installed shower body to fix it. We supplied the materials including the shower body which he did not use but instead left the old one in which doesn’t quite fit with the new shower handle. The toilet was loose and crooked also not sealed on the bottom as per code. When I pointed out to the worker that he had caused a leak, water was pouring into my basement he attempted to charge me an additional $100 to fix his own mistake. The tiles were not properly spaced so some were too close to receive the black grout that we had intended to distribute over the whole tiling project, it remains unevenly grouted. With the uneven spacing it is impossible to grout properly. Overall a disaster of a job, most of the work he did had to be redone."

Elba R on December 2020

We have the experience and dedication to bring your dreams to reality! Specializing in Remodeling, we guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click to schedule a free estimate today!

"The company represented to be competent and experienced at bathroom remodeling however the worker, Joel was not able to complete the job efficiently. He installed a shower liner over a shower body which he had improperly installed which caused leaks and a situation where we had to break through a wall to get to the improperly installed shower body to fix it. We supplied the materials including the shower body which he did not use but instead left the old one in which doesn’t quite fit with the new shower handle. The toilet was loose and crooked also not sealed on the bottom as per code. When I pointed out to the worker that he had caused a leak, water was pouring into my basement he attempted to charge me an additional $100 to fix his own mistake. The tiles were not properly spaced so some were too close to receive the black grout that we had intended to distribute over the whole tiling project, it remains unevenly grouted. With the uneven spacing it is impossible to grout properly. Overall a disaster of a job, most of the work he did had to be redone."

Elba R on December 2020

Avatar for Alliance Enterprises Masonry & Waterproofing

Alliance Enterprises Masonry & Waterproofing

150 Maple Avenue
5.00(
7
)

Alliance Enterprises Masonry & Waterproofing

150 Maple Avenue
5.00(
7
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Alliance A1 Enterprises, a family owned and operated basement waterproofing business for over 3 decades!! Alliance A1 Enterprises provides waterproofing services in Middlesex County, Union county, and surrounding communities in the tri-state area. Waterproofing is achieved with the interior and exterior application of sealing products, combined with the installation of French drains, sump pumps with battery backups and exterior drainage. These solutions will give you peace of mind whether you're home or traveling! Alliance A1 Enterprises also provides basement and foundation repair, crawl space solutions, exterior drainage and masonry services. With free estimates and a lifetime warranty on our basement waterproofing services, you can rest easy knowing that your project will be handled with the utmost care. Please call us today for more information. In the case of an emergency, there’s no need to panic! We offer same-day service to ensure that your home is safe and secure.

"The work was excellent, it went well and I'm going to use them to finish my basement, They were professional, courteous, and polite."

Karen C on October 2022

Alliance A1 Enterprises, a family owned and operated basement waterproofing business for over 3 decades!! Alliance A1 Enterprises provides waterproofing services in Middlesex County, Union county, and surrounding communities in the tri-state area. Waterproofing is achieved with the interior and exterior application of sealing products, combined with the installation of French drains, sump pumps with battery backups and exterior drainage. These solutions will give you peace of mind whether you're home or traveling! Alliance A1 Enterprises also provides basement and foundation repair, crawl space solutions, exterior drainage and masonry services. With free estimates and a lifetime warranty on our basement waterproofing services, you can rest easy knowing that your project will be handled with the utmost care. Please call us today for more information. In the case of an emergency, there’s no need to panic! We offer same-day service to ensure that your home is safe and secure.

"The work was excellent, it went well and I'm going to use them to finish my basement, They were professional, courteous, and polite."

Karen C on October 2022

General constuction

252 52st Brooklyn
No reviews yet

General constuction

252 52st Brooklyn
No reviews yet
13 years of experience

Premium Concept Design,Inc NYC is a professional construction company in NYC. Since 1996, we have helped New York City homeowners and business owners with their remodeling, renovation and construction projects. Working closely with engineers and architects, Premium Concept Design,Inc specializes in environmentally friendly construction services in NYC. We understand the importance of sustainable construction services and building practices and contributing toward a greener city. We strive to use eco-friendly construction products on every project we complete, right down to the roofing and the electrical services. When we take on a construction project in NYC, we stay fully committed to each detail until completion. Everything that we do is built to last. If desired, we will see our clients throughout the entire construction process. From the initial architectural designs and layouts all the way to the final finishes and electrical work, Pyramid Group NYC provides precise, accurate and professional construction services in NYC. Services Provided Building planning | Architectural design | Site preparation | Floor planning | Construction | Plumbing installation service | Wall installation service | Roofing installation service | Utilities installation service | Insulation service | Electrical service | Flooring/finishing ᐧ

Premium Concept Design,Inc NYC is a professional construction company in NYC. Since 1996, we have helped New York City homeowners and business owners with their remodeling, renovation and construction projects. Working closely with engineers and architects, Premium Concept Design,Inc specializes in environmentally friendly construction services in NYC. We understand the importance of sustainable construction services and building practices and contributing toward a greener city. We strive to use eco-friendly construction products on every project we complete, right down to the roofing and the electrical services. When we take on a construction project in NYC, we stay fully committed to each detail until completion. Everything that we do is built to last. If desired, we will see our clients throughout the entire construction process. From the initial architectural designs and layouts all the way to the final finishes and electrical work, Pyramid Group NYC provides precise, accurate and professional construction services in NYC. Services Provided Building planning | Architectural design | Site preparation | Floor planning | Construction | Plumbing installation service | Wall installation service | Roofing installation service | Utilities installation service | Insulation service | Electrical service | Flooring/finishing ᐧ

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Basement Waterproofing questions, answered by experts

Crawl space encapsulation can make repairs more complicated, particularly if you have plumbing or wiring surrounding your crawl space area. Additionally, some home designs benefit from the additional airflow that crawl spaces with vents provide. Vents are no longer an option after encapsulation. Always talk to your crawl space contractor to ensure the pros outweigh the cons before investing in the installation.

Egress windows or doors are required in finished basements to meet safety and building codes. If your basement is unfinished and used as a storage space, egress windows are not required, but anything considered a habitable space must have an additional point of egress in addition to the stairs.

Most people consider a French drain to be one of the most effective solutions for foundation leaks, but it’s not always a standalone solution. French drains will help keep water away from your foundation to reduce the risk of leaking and structural damage from soil expansion, but depending on your foundation type and location, you might need other systems or techniques—like soil gradation and gutter and leader installation—to resolve the underlying problem.

As the first layer of water protection for your roof deck and the building materials below, underlayment is designed to prevent water damage, so it’s okay if it gets wet. However, you shouldn’t rely solely on underlayment for protection. If rain interrupts your roof project and you have all of the underlayment down, you’ll likely be fine, but you should install shingles over that layer as soon as possible, as long-term exposure can lead to water damage.

A moisture or vapor barrier helps separate the warm air inside your home from the cold air outside of it. Without it, your walls could collect condensation, mold, or other damage. Check your local building codes to see if including an interior vapor barrier is necessary for your building project or renovation, especially for rooms that are likely to be humid, like bathrooms.

The Delaware, NJ homeowners’ guide to basement waterproofing services

From average costs to expert advice, get all the answers you need to get your job done.

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