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Best basement waterproofing pros near North Star, DE

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    Verified basement waterproofing services reviews

Top-Rated Basement waterproofing pros in North Star - Updated Nov 2026

Avatar for Waterproofing One
Waterproofing One
4.7(
152
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving North Star, DE and surrounding areas

Approved

In business since 1999

Free estimates

Warranties offered

"Fast Estimate , had many estimates from other companies and Waterproofing One was the best price for Us , Joe was very confident and knowledgeable and gave Us good suggestions for our leaking basement, the crew that installed the French drain inside were great, install looks very professional. I figured we’d have a mess to clean up after the install understandably. But wow they did an incredible job cleaning up afterwards. Not a speck, they even spent time cleaning off the driveway and front lawn. We have been through one major rain storm since the install and not a drip of water. So far so good , we are getting an expected 3” in the next 24 hours and it’s a relief to know I don’t have to stress about rain storms anymore!"
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+7

6 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Basement Waterproofing Nationwide Inc
Basement Waterproofing Nationwide Inc
4.6(
188
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving North Star, DE and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

"Basement Waterproofing Nationwide did excellent work in a timely and proffessional manner for a reasonable and appropriate fee. They said they would complete the work in 1-2 days and were done in one day. They were very careful and left things neater than they were before they came. We have used them before with great success and would use them again. So far, the problem we had, water in our basement, has not recurred, and our basement is bone dry. Tnank you Basement Waterproofing Nationwide."
Additional Photos
Response time2 days
12 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Quality 1st Basement Systems, Inc
Quality 1st Basement Systems, Inc
4.6(
230
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving North Star, DE and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"We are currently happy with the basement waterproofing and remodeling that was completed! There were issues - most minor but we haven't anything to compare as this was the first-time having contractors complete basement work for us; and our home is almost 100 years old. They were flexible given unexpected issues that came about with the basement. The water proofing was done first and they did a great job. They were happy to review and resolve any remaining questions/concerns and/or issues. Jorge in the service dept. is professional, punctual and is a great representative and asset for this company."
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+129

Response time10 hrs
Response rate100%
22 neighbors recently requested a quote
Avatar for Basement Gurus, LLC
Basement Gurus, LLC
4.8(
217
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving North Star, DE and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Warranties offered

"The team arrived on time to do extensive work on my basement floor and walls and outside underground drainage issues. They worked tirelessly all day to remove old concrete, lay a new pipe system, pour new concrete, install sump pump, and seals. They prepped the walls and sealed and painted with Loxon paint. Radon seals were included in the redone areas. The outside work included installation of a new underground drainage pipe with pop up exit drain. A rubber membrane was installed behind the house siding. We?ve had several days of heavy rain since the waterproofing work was completed and the basement floor and walls have remained dry. We recommend Basement Gurus to other homeowners experiencing waterproofing problems for dependable and satisfying solutions."
100 Ft 4 inch HDPE to drywell
Concrete Replacement
Egress Installation
Walls After Wall Pin Installation
After Concrete has been removed

+339

Response time1 day
538 neighbors recently requested a quote
Recommended by68%of homeowners
Basement Waterproofing Specialists
4.0(
597
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving North Star, DE and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"I had a serious basement flooding problem. I had my basement waterproofed 2 times. it didn't work! Basement Waterproofing Specialists installed a commercial drain system and after 2 years I have never had a drop of water they are AMAZING, thank you Basement Waterproofing specialists YOU ARE THE BEST!"
Foundation Repair
 Before and After Stone Work
 Mirra Drain
 Mold Remediation
 Clean Work Areas

+67

Response time11 hrs
281 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Completely Dry Waterproofing
Completely Dry Waterproofing
4.6(
16
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving North Star, DE and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"I would recommend Completely Dry Waterproofing because they have excellent salespeople who thoroughly explain the work to be done. They arrive promptly, work neatly, clean up thoroughly, and offer a very competitive price. And, my basement is dry where they completed their work."
Response time1 day
Response rate94%
8 neighbors recently requested a quote
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Basement Waterproofing FAQs, answered by experts

Ideal humidity conditions generally range from 30% to 50%, with 45% considered optimal humidity for most homes. If your humidity levels drop below that range, you can turn your dehumidifier off. Additionally, suppose the temperature where the dehumidifier is installed falls below 60 degrees Fahrenheit. In that case, it's best to turn it off and unplug it since cooler temperatures can cause the unit's coils to freeze.

Water damage always poses a primary risk of mold and mildew, but growth is not guaranteed. Whether mold develops depends on several factors, including the severity of the water damage and how quickly the area is addressed. To prevent mold, you must act fast—ideally within the first 24 hours. The process involves cleaning up all standing water and thoroughly drying the affected area. If the damage is extensive, the cleanup was delayed, or you suspect mold might be present, it is safest to assume it has grown and contact a professional mold inspector or removal expert to assess the situation.

It is better to have a crawl space that is tailored to the outside temperature, your needs, and the season. For example, it is much better to have a vented space when it’s very hot outside and your AC bills are sky-high. Conversely, when the temperature drops and humidity rises, it is almost always better to have your vents shut and covered if possible.

You should take care of any sign of water in your basement, whether it’s dampness after heavy rain or puddles of water on the floor. Besides potentially causing a health hazard, the moisture can damage your home’s structure and foundation. Furthermore, mold can grow quickly and spread throughout the rest of your home. With mold remediation costs ranging between $1,200 and $3,400, it’s best to avoid mold issues by fixing the leak.

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 North Star, DE homeowners’ guide to basement waterproofing services

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