Top-rated basement waterproofing pros.

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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon76
    Verified basement waterproofing services reviews

Find Basement waterproofing pros in Portland

Avatar for Connecticut Basement Systems, Inc.

Connecticut Basement Systems, Inc.

33 Progress Avenue
4.67(
141
)
Approved Pro

Connecticut Basement Systems, Inc.

33 Progress Avenue
4.67(
141
)
Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
38 years of experience

Connecticut Basement Systems is your trusted expert for basement waterproofing, crawl space repair, basement finishing, and foundation repair. Using patented, warrantied products, we provide permanent solutions for your home. Have a wet, flooded basement or crawl space? Tilted or bowing foundation walls? A basement you want to finish? We have a solution. We proudly serve homeowners and businesses all throughout Connecticut & Westchester County, NY. Call us today for a free inspection and no-obligation, estimate. Financing available. Additional phones - (203) 881-5090. Award winning.

"Chuck Stofko was very informative. Was patient in answering all my questions. Spent along time with me reviewing the process and the steps needed to waterproof my basment. I highly recommend him."

Justin F on August 2023

Connecticut Basement Systems is your trusted expert for basement waterproofing, crawl space repair, basement finishing, and foundation repair. Using patented, warrantied products, we provide permanent solutions for your home. Have a wet, flooded basement or crawl space? Tilted or bowing foundation walls? A basement you want to finish? We have a solution. We proudly serve homeowners and businesses all throughout Connecticut & Westchester County, NY. Call us today for a free inspection and no-obligation, estimate. Financing available. Additional phones - (203) 881-5090. Award winning.

"Chuck Stofko was very informative. Was patient in answering all my questions. Spent along time with me reviewing the process and the steps needed to waterproof my basment. I highly recommend him."

Justin F on August 2023


Avatar for Groundworks-New Haven

Groundworks-New Haven

101 Powdered Metal Drive
5.00(
1
)
Approved Pro

Groundworks-New Haven

101 Powdered Metal Drive
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
30 local quotes requested

Groundworks is North America’s leading foundation repair and water management solutions company. Groundworks has been serving homeowners across the U.S. and Canada for decades, providing quality home repair solutions. Groundworks is a BBB-accredited business and a multi-time recipient of the Angi Super Service Award. Our 50-plus years of combined expertise brings Connecticut homeowners innovative solutions and industry-leading warranties to protect their biggest investment, their homes. HIC.0699918

"Professional and efficient tech."

Mark R on April 2025

Groundworks is North America’s leading foundation repair and water management solutions company. Groundworks has been serving homeowners across the U.S. and Canada for decades, providing quality home repair solutions. Groundworks is a BBB-accredited business and a multi-time recipient of the Angi Super Service Award. Our 50-plus years of combined expertise brings Connecticut homeowners innovative solutions and industry-leading warranties to protect their biggest investment, their homes. HIC.0699918

"Professional and efficient tech."

Mark R on April 2025


Avatar for Eastern Waterproofing Co., Inc.

Eastern Waterproofing Co., Inc.

PO Box 504
4.83(
31
)
Approved Pro

Eastern Waterproofing Co., Inc.

PO Box 504
4.83(
31
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
42 local quotes requested

In an attempt to get back to all the people who have recently contacted us, we're providing email addresses of [email protected] and [email protected]. PLEASE USE EMAIL WHENEVER POSSIBLE! We have gotten inundated with phone calls and apologize that we may have not gotten back to you in a timely fashion, as normal. We pride ourselves on quick response times but the recent rains have caused an unprecedented backlog in calls to our office. We are doing our best to work through it. In the meantime, please, try emailing DESCRIBING YOUR ISSUE, your AVAILABILITY DURING A TYPICAL WEEK and YOUR NAME AND ADDRESS AND PHONE # AND SEND RELEVANT PICTURES, IF POSSIBLE! We will do our best to respond ASAP as we work through our call backlog. *If a requested appointment time is not confirmed through our office it is NOT scheduled with our team! Thank you for your patience and understanding!

"Everyone was really good to work with at the beginning of the waterproofing to the very end. No complains about the completed Job. I have yet to see the system work because we just have not had Heavy rain over a Long period of time."

Stephen M on July 2024

In an attempt to get back to all the people who have recently contacted us, we're providing email addresses of [email protected] and [email protected]. PLEASE USE EMAIL WHENEVER POSSIBLE! We have gotten inundated with phone calls and apologize that we may have not gotten back to you in a timely fashion, as normal. We pride ourselves on quick response times but the recent rains have caused an unprecedented backlog in calls to our office. We are doing our best to work through it. In the meantime, please, try emailing DESCRIBING YOUR ISSUE, your AVAILABILITY DURING A TYPICAL WEEK and YOUR NAME AND ADDRESS AND PHONE # AND SEND RELEVANT PICTURES, IF POSSIBLE! We will do our best to respond ASAP as we work through our call backlog. *If a requested appointment time is not confirmed through our office it is NOT scheduled with our team! Thank you for your patience and understanding!

"Everyone was really good to work with at the beginning of the waterproofing to the very end. No complains about the completed Job. I have yet to see the system work because we just have not had Heavy rain over a Long period of time."

Stephen M on July 2024


"Cayden was very professional and polite. This visit was for yearly Maintence of my sump pump. "

Bernadette H on October 2025

Budget Dry Waterproofing is a waterproofing company founded on the belief that quality home improvement work does not need to break the bank. We are dedicated to providing excellent service.

"Cayden was very professional and polite. This visit was for yearly Maintence of my sump pump. "

Bernadette H on October 2025


Avatar for Connecticut Basement Systems, Inc.

Connecticut Basement Systems, Inc.

33 Progress Avenue
4.80(
35
)
Approved Pro

Connecticut Basement Systems, Inc.

33 Progress Avenue
4.80(
35
)
Approved Pro
Customers say: Quick response
144 local quotes requested
38 years of experience

Work completed by Connecticut Basement Systems, Inc., is warranted for lifetime of your home. Satisfaction is guaranteed and we assure prompt reply to all inquiries. Free estimates and financing are available. We've wowed over 30,000 customers since 1987. We have an A plus Better Business Bureau rating. Check us out for unbiased reviews and customer testimonials.

"Overall, working with the company was a good experience."

Marcy W on October 2024

Work completed by Connecticut Basement Systems, Inc., is warranted for lifetime of your home. Satisfaction is guaranteed and we assure prompt reply to all inquiries. Free estimates and financing are available. We've wowed over 30,000 customers since 1987. We have an A plus Better Business Bureau rating. Check us out for unbiased reviews and customer testimonials.

"Overall, working with the company was a good experience."

Marcy W on October 2024



Family owned business with over 15 years of experience - Concrete - Pouring & Repair, Driveways - Asphalt, Masonry.


Avatar for Rudolph Renovation

Rudolph Renovation

62 Wheaton Road
No reviews yet

Rudolph Renovation

62 Wheaton Road
No reviews yet
4 years of experience

Rudolph Renovation is a family owned commercial and residential general construction company established in 2021. We specializing in home remodeling, General Carpentry, Drywall and Taping, Kitchen and Bath Remodeling, Tiling, Windows and Door installations. We are fully Insured and Licensed. Please reach out to us for a free estimate."

Rudolph Renovation is a family owned commercial and residential general construction company established in 2021. We specializing in home remodeling, General Carpentry, Drywall and Taping, Kitchen and Bath Remodeling, Tiling, Windows and Door installations. We are fully Insured and Licensed. Please reach out to us for a free estimate."


"Everything was perfect from start to the finish thank you again John."

Harvey P on October 2025

"Everything was perfect from start to the finish thank you again John."

Harvey P on October 2025


Hi we are a company that specializes in drainage and waterproofing, if u have water coming down your backyard or in to your basement well you came to the right place, we offer many services and all different types of drainage

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Basement Waterproofing questions, answered by experts

Make sure you're calling in the right expert to help repair and/or clean your crawl space. A serious issue may require multiple experts that include a local mold remediation pro, an HVAC pro, a foundation pro, and a plumber. You should also consider using a nearby junk removal service to avoid handling debris that could be covered in mold, fungi, rot, or asbestos.

The most challenging part of finishing a basement is addressing moisture control. Basement waterproofing is an essential task that requires a professional’s skills and knowledge. If you don’t properly waterproof your finished basement, it’ll be vulnerable to dampness, water damage, and mold growth. Ensuring proper insulation and ventilation to combat these issues while meeting building codes adds complexity to your remodeling project.

Your homeowners insurance can cover slab leak repairs, but it really depends on your policy. Some homeowners insurance policies only cover slab leaks caused by natural disasters, while other plans are more comprehensive. You might also want to check your home warranty plan to see if they'll cover the cost of the repairs if one of your appliances caused the leak.

Yes, these services often increase home value by preventing moisture-related issues and enhancing the usable space in basements or crawlspaces.

While water in your basement is unlikely to make you sick unless it’s coming from a sewage backup, mold is likely to start to grow in wet areas within 24 hours, and mold can make you sick. According to the Centers for Disease Control and Prevention (CDC), inhaling mold spores can cause allergy symptoms, including runny nose, itchy eyes, difficulty breathing, wheezing, and itchy skin. Individuals with pre-existing respiratory issues like asthma and immunocompromised individuals are at an elevated risk of symptoms when inhaling mold spores.

The Portland, CT homeowners’ guide to basement waterproofing services

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