Top-rated basement waterproofing pros.

Get matched with top basement waterproofing pros in Williamstown, NJ

There are 17 highly-rated local basement waterproofing pros.

Need a pro for your basement waterproofing project in Williamstown, NJ?
Select your specific project to find the pro for you.

TRUSTED BY WILLIAMSTOWN, NJ HOMEOWNERS

Average homeowner rating star icon4.6
Average homeowner rating
Verified reviews icon121
Verified basement waterproofing services reviews

Basement waterproofing pros in Williamstown

Dry-At-Last Waterproofing
618 S White Horse Pike
5.00(
5
)
Dry-At-Last Waterproofing
618 S White Horse Pike
5.00(
5
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

"Our Name Is Our Promise!" Dry-At-Last! For two generations now, Dry-At-Last Waterproofing & Foundation Repair has offered a complete and comprehensive inspection of the interior and exterior of your property - entirely free of charge! With over 30 years of experience and as pioneers of the industry, each job is custom designed to resolve any of your basement and foundation issues. We pride ourselves on hard work and old-fashioned values. Our simple and affordable solutions are the very best for you and your family to rely on. No matter what the concern let us welcome you to our large and neighboring family of satisfied customers and provide you peace of mind.

"They were very prompt and clean. They followed through on all promises. Steve personally came out to check on the work when I had concerns. After a big rain he came to check there were no water issues. They were a great company to work with."

Marie R on March 2020

"Our Name Is Our Promise!" Dry-At-Last! For two generations now, Dry-At-Last Waterproofing & Foundation Repair has offered a complete and comprehensive inspection of the interior and exterior of your property - entirely free of charge! With over 30 years of experience and as pioneers of the industry, each job is custom designed to resolve any of your basement and foundation issues. We pride ourselves on hard work and old-fashioned values. Our simple and affordable solutions are the very best for you and your family to rely on. No matter what the concern let us welcome you to our large and neighboring family of satisfied customers and provide you peace of mind.

"They were very prompt and clean. They followed through on all promises. Steve personally came out to check on the work when I had concerns. After a big rain he came to check there were no water issues. They were a great company to work with."

Marie R on March 2020


Armac Enterprises Llc
104 Celestino Ct
No reviews
Armac Enterprises Llc
104 Celestino Ct
No reviews
8 years of experience

Armac Enterprises Llc. Licensed and Insured Arnold Mack (Owner) 267-701-2526 Vogue Wallace (Co-Owner) 786-203-9696

Armac Enterprises Llc. Licensed and Insured Arnold Mack (Owner) 267-701-2526 Vogue Wallace (Co-Owner) 786-203-9696


AJD Designs
102 Taggart Drive
No reviews
AJD Designs
102 Taggart Drive
No reviews
8 years of experience

New and upcoming general contracting company ran by myself an my partner. Very personable people. The goal is to provide customers with outstanding service an quality in a timely fashion. Being that I have just started my business depending on the size of the job, customers will be required to pay for materials an a portion of the quote to ensure all materials are present. We are very driven an dedicated individuals with one goal an that is customer satisfaction.

New and upcoming general contracting company ran by myself an my partner. Very personable people. The goal is to provide customers with outstanding service an quality in a timely fashion. Being that I have just started my business depending on the size of the job, customers will be required to pay for materials an a portion of the quote to ensure all materials are present. We are very driven an dedicated individuals with one goal an that is customer satisfaction.


Pro Cats General Construction Llc
4.86(
7
)
Pro Cats General Construction Llc
4.86(
7
)
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Pro Cats General Construction LLC is local construction business. Family operated, we learned the Roofing trade from one of our family members in the early years. As time has passed, we have acquired knowledge in all home improvement phases. Not just by doing the labor but researching, studying different processes and new innovations to better serve our customers. We take pride in representing quality, teamwork and honesty. We strive for Growth within every experience, and to ensure our work and services are safe for you and the environment. What really matters to us long term is your satisfaction with our work. What we stand for and our driving forces come from family, without it we wouldn’t be here today. Family made us who we are and help us grow daily.

"Rudy and his guys were great. Super responsive, worked hard, did it right. I'll be hiring them again."

Robert F on March 2021

Pro Cats General Construction LLC is local construction business. Family operated, we learned the Roofing trade from one of our family members in the early years. As time has passed, we have acquired knowledge in all home improvement phases. Not just by doing the labor but researching, studying different processes and new innovations to better serve our customers. We take pride in representing quality, teamwork and honesty. We strive for Growth within every experience, and to ensure our work and services are safe for you and the environment. What really matters to us long term is your satisfaction with our work. What we stand for and our driving forces come from family, without it we wouldn’t be here today. Family made us who we are and help us grow daily.

"Rudy and his guys were great. Super responsive, worked hard, did it right. I'll be hiring them again."

Robert F on March 2021


Master Attic, LLC
2486 Ridgeway Blvd
4.94(
49
)
Master Attic, LLC
2486 Ridgeway Blvd
4.94(
49
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Servicing NJ/PA/DE At Master Attic, our goal is to provide you with the highest quality materials and workmanship at an affordable price. We are a team of licensed, trained professionals with 20+ years of experience in insulation and rodent solutions. May it be rodent proofing, insulation removal, insulation installation, sanitizing, moisture barrier, radiant barrier, air duct repair replacement, or crawlspace cleaning, we have you covered. Do you hear noises in the attic? Smell something in the crawl space!? Schedule an appointment today, and have one of our technicians come out to assess the area and provide a free detailed estimate for the project.

"Extremely professional and did an amazing job."

Ravi A on December 2023

Servicing NJ/PA/DE At Master Attic, our goal is to provide you with the highest quality materials and workmanship at an affordable price. We are a team of licensed, trained professionals with 20+ years of experience in insulation and rodent solutions. May it be rodent proofing, insulation removal, insulation installation, sanitizing, moisture barrier, radiant barrier, air duct repair replacement, or crawlspace cleaning, we have you covered. Do you hear noises in the attic? Smell something in the crawl space!? Schedule an appointment today, and have one of our technicians come out to assess the area and provide a free detailed estimate for the project.

"Extremely professional and did an amazing job."

Ravi A on December 2023


Bulldog Cleaning & Restoration
93 Old York Rd. Suite 1-516
No reviews
Bulldog Cleaning & Restoration
93 Old York Rd. Suite 1-516
No reviews
12 years of experience

Bulldog Cleaning & Restoration provides environmental and disaster restoration services to both commercial and residential customers.

Bulldog Cleaning & Restoration provides environmental and disaster restoration services to both commercial and residential customers.


Mariani Building Co-Contractors
Haverford Road
5.00(
9
)
Mariani Building Co-Contractors
Haverford Road
5.00(
9
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Matthew J. Mariani is a third generation Builder and Artist who formally studied Fine Arts, Design and Architecture (BSID 1992). Matthew Mariani Additions and Remodeling Co., designs and builds thoughful new spaces onto lovely Philadelphia Main Line homes. Matthew Mariani's primary concern is doing great work and his customer's satisfaction.

Matthew J. Mariani is a third generation Builder and Artist who formally studied Fine Arts, Design and Architecture (BSID 1992). Matthew Mariani Additions and Remodeling Co., designs and builds thoughful new spaces onto lovely Philadelphia Main Line homes. Matthew Mariani's primary concern is doing great work and his customer's satisfaction.


Level 1 Construction
980 Coles Mill Road
No reviews
Level 1 Construction
980 Coles Mill Road
No reviews
19 years of experience

Level 1 Construction is NJ's best family-owned excavation, concrete, handyman and general contracting company. We work with both residential and commercial customers, offering competitive pricing while providing quality workmanship.

Level 1 Construction is NJ's best family-owned excavation, concrete, handyman and general contracting company. We work with both residential and commercial customers, offering competitive pricing while providing quality workmanship.


Easy Hall, Inc.
608 Broadway, Suite B
No reviews
Easy Hall, Inc.
608 Broadway, Suite B
No reviews
27 years of experience

Easy Hall, Inc. has been in business since 1998 and we have approximately eight (8) employees they include skilled positions such as but not limited to Carpenters, Plumbers and Electricians. We also partner with reputable sub-contractors. Easy Hall, Inc. offer discounts to senior citizens and veternans and in cases of homes destroyed and/or damaged by fire, we make every effort to work with the homeowner on a payment plan they can afford.

Easy Hall, Inc. has been in business since 1998 and we have approximately eight (8) employees they include skilled positions such as but not limited to Carpenters, Plumbers and Electricians. We also partner with reputable sub-contractors. Easy Hall, Inc. offer discounts to senior citizens and veternans and in cases of homes destroyed and/or damaged by fire, we make every effort to work with the homeowner on a payment plan they can afford.


JOHN'S GENERAL CONTRACTING
4529 Teesdale Street
No reviews
JOHN'S GENERAL CONTRACTING
4529 Teesdale Street
No reviews
Free onsite estimate

JOHN'S CONTRACTING DOES IT ALL NO JOB TO BIG NO JOB TOO SMALL, WERE ALWAYS ON TIME AND THE JOBS ALWAYS DONE RITE.FROM BROKEN PIPES TO REDOING THE WHOLE HOUSE..

JOHN'S CONTRACTING DOES IT ALL NO JOB TO BIG NO JOB TOO SMALL, WERE ALWAYS ON TIME AND THE JOBS ALWAYS DONE RITE.FROM BROKEN PIPES TO REDOING THE WHOLE HOUSE..

...
Showing 21-30 of 207

FAQs for basement waterproofing projects in Williamstown, NJ

Due to the nature of basements, some level of waterproofing is necessary to prevent water from seeping in and causing damage. Some definitive signs that your basement needs waterproofing measures or needs existing waterproofing measures need to be updated include:

  • Water in your basement, including damp walls or puddles on the floor

  • Mold spots in your basement

  • Musty smells or odors

  • Warped doors or walls

  • Cracks in walls

  • Insect issues, such as cockroaches and termites

You can DIY basement waterproofing in some ways to help save on the overall costs. If your basement isn’t experiencing a lot of water but is noticeably humid, you can try running a dehumidifier that will pull the excess water out of the air. If you notice water leaking due to outdoor drainage issues, you can add downspout extensions to keep rainwater away from your home. 

However, if the problem is more severe and requires a more extensive solution, it’s best to call a basement waterproofing professional to assess the treatment you need and install waterproofing safeguards properly. Since keeping water out of your basement is important, ensuring this job is done correctly the first time is best.

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.

Several factors dictate if you should waterproof the interior or exterior of your basement. Waterproofing the exterior of your home is a great option if you use your basement for storage, as it provides the most protection from water and water damage. If you prefer work done outside of your home versus inside, exterior waterproofing is best for you. However, interior waterproofing is often less expensive since the area is easier to reach and requires less labor.

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 Williamstown, NJ homeowners’ guide to basement waterproofing services
From average costs to expert advice, get all the answers you need to get your job done.
large white house on a rainy autumn day
Feb 5, 2025
Feb 5, 2025
Sump pump replacement costs depend on the type of unit you have and the cost of labor, which varies by region. Read on to find out more about what to expect.
Pastel blue walls in a basement living room
May 22, 2025
May 22, 2025
Sump pumps are a must for homeowners who live in flood zones. Find out how much sump pump installation costs based on type, location, and features.
farmhouse bathroom with a wood cabinet
Nov 13, 2024
Nov 13, 2024
Sump pump battery backup costs depend on the type and the design of the system purchased. Follow this guide to learn how to budget for your backup battery.
An open-space living room in a house’s basement
Jun 6, 2025
Jun 6, 2025
A basement offers additional living or storage space, but if it leaks, it can become a significant headache. Learn how to fix a leaky basement and prevent water damage.
A living room with a fireplace located in the basement of a house
Apr 23, 2025
Apr 23, 2025
Even when you've properly installed your sump pump, flooded basements are not uncommon. Here's why you could still get into hot water.
luxury house by the lake
Jul 5, 2024
Jul 5, 2024
Wondering how you can make a flood-proof house? We’ve got 10 essential tips to prepare and protect you in case of flooding following severe weather.
Tell us about the job—we’ll find top pros.