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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon40
    Verified french drain services reviews

Verified Reviews for French Drain Service pros in Cornish, NH

*The Angi rating for French Drain Service companies in Cornish, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their French Drain Service needs.

*The HomeAdvisor rating for French Drain Service companies in Cornish, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their French Drain Service needs.

Last update on August 07, 2026

Find French drain pros in Cornish

Gotme Under Pressure ?, LLC
4.3(
648
)
Drain Clog or Blockage - ClearSump Pump or Interior Foundation Drains - Install

Serving Cornish, NH and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

"Exchanged messages with Mike to describe work needed, replace an outdoor faucet and shutoff value (previous faucet was leaking). He gave an estimate, reviewed work to be done. Replaced outdoor spigot with a frost-proof spigot, put on new value. Quick test and validation. Professional, efficient and happy with work done! Thank you Mike !"
1 neighbors recently requested a quote
Recommended by88%of homeowners
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Avatar for Action Plumbing Heating And Air
Action Plumbing Heating And Air
4.9(
92
)
Drain Clog or Blockage - ClearDrain Clog or Blockage - Clear - For BusinessDrain Line Breakage - Camera Locate+2 more

Serving Cornish, NH and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"They were timely, courteous and knowledgeable. They did the job right and immediately fixed the problem. Cost of plumbing repair was very reasonable. I would definitely hire them again!"
Response time1 day
Response rate89%
19 neighbors recently requested a quote
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Avatar for GM Mechanical LLC
GM Mechanical LLC
5.0(
9
)
Drain Clog or Blockage - ClearDrain Clog or Blockage - Clear - For BusinessDrain Line Breakage - Camera Locate+2 more

Serving Cornish, NH and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"Gage has been excellent to work with. We will hire him any time we need something in the future. The work site is always clean, the new install always looks tidy. He has installed a water filter, fixed several leaks in old plumbing, replaced hose bibs, worked on our booster and expansion tank, replaced fixtures. It's always great work."
Additional Photos
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+11

Response time1 day
Response rate100%
Recommended by88%of homeowners
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Avatar for Northern Basement Systems
Northern Basement Systems
4.6(
21
)
Basement Drainage Channels - InstallFoundation Drainage - Install or Replace

Serving Cornish, NH and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"Northern basements was able to fit us in quickly, pulled our crooked cement wall back in-place and sealed the wall to prevent future leaks.  The work was timely, communication was friendly and detailed, and price was as to be expected for the large amount of work that needed to be done.  We are very pleased with the whole process as well as the results.
"
Additional Photos
Additional Photos
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Additional Photos
Additional Photos

+25

Response time1 day
7 neighbors recently requested a quote
Recommended by88%of homeowners
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Avatar for Groundworks
Groundworks
4.6(
26
)
Sump Pump or Interior Foundation Drains - InstallBasement Drainage Channels - Install

Serving Cornish, NH and surrounding areas

Approved (Corporate)

In business since 1996

Free estimates

Warranties offered

"So far, so good. The finished project looks great; it really hasn't been tested yet as there has been little or no rain. Groundwater used to flow through the cellar after heavy rains so we'll see it the subsurface floor drain works. The floor looks good, the price was right (lowest of three bids) and Beth was very helpful and available to answer all my questions. At the moment, I'm very happy."
Foundation
Foundation
Foundation
Basement
Basement

+16

Response time12 hrs
197 neighbors recently requested a quote
Recommended by56%of homeowners
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Avatar for Basement Solutions LLC
Basement Solutions LLC
New to Angi
Basement Drainage Channels - InstallFoundation Drainage - Install or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Cornish, NH and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

We pride our company on reliability, integrity and quality work. We are experts in our trade. We look forward to earning your business! We specialize in concrete crack repair and injections, basement waterproofing, sump pump installations, basement and egress window installations, crawlspace repair, moisture control, foundation repair and so much more.\nCall us today for a free estimate.

Egress
Egress
Egress
Sump Pump
Perimeter System

+4

13 neighbors recently requested a quote
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Avatar for Gotme Under Pressure ?, LLC
Gotme Under Pressure ?, LLC
4.2(
640
)
Drain Clog or Blockage - Clear

Serving Cornish, NH and surrounding areas

In business since 1987

Free estimates

Emergency services offered

"I got a call from Mike right after placing the request. We set up a time to come out and fix the clog in my tub and he was early. Within 45 minutes he had the clogged drain fixed working properly and gave some professional advice on the drain system. I would highly recommend using them for all plumbing needs."
Response time6 hrs
Recommended by89%of homeowners
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Avatar for Viper Drain Cleaning
Viper Drain Cleaning
4.1(
48
)
Drain Clog or Blockage - ClearDrain Clog or Blockage - Clear - For BusinessDrain Line Breakage - Camera Locate+1 more

Serving Cornish, NH and surrounding areas

In business since 2020

Free estimates

Emergency services offered

"Chris Adams of Viper Drain Cleaning responded immediately to my call for drain repairs. He was able to come out immediately and was able to complete repairs in 10 min. He was very professional and courteous. I will definitely refer Viper to friends and family."
Main Sewer Line Blocked
Response time3 hrs
Response rate97%
Recommended by87%of homeowners
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Avatar for Sewer Surgeons LLC
Sewer Surgeons LLC
5.0(
9
)
Drain Clog or Blockage - ClearDrain Line Breakage - Camera Locate

Serving Cornish, NH and surrounding areas

In business since 2013

Free estimates

Emergency services offered

"Ethan showed up on time and explained everything that needed to be done, protected all of our floors and did an awesome job cleaning up. Thank you!"
Septic Repairs
Septic Repairs
Septic Repairs
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French Drains questions, answered by experts

No, you should not see water in a sewer cleanout. If you do, it could indicate that you have a block or leak in your main sewer line—which can cause sewage to back up inside your home and potentially flood your yard. Your best bet is to call a local sewer cleaner if you notice any water or sewage around your cleanout.

Clogged pipes are one of the top signs your water heater is about to fail. Potential symptoms of excess sediment buildup include not enough hot water, leaks, unusual noises, low water pressure, and discoloration or odors in the water.

Most blockages can be cleared in 1-3 hours, but severe issues may take longer.

A professional drain cleaner is a plumber or specialized drain cleaner with the necessary tools to unclog drains and tiles to keep waste water flowing out to the septic tank or city sewer for processing. Keeping wastewater from backing up into your home helps keep you and your family safe from potential contamination and sickness. These pros can help resolve nearly any drain situation in a safe and efficient manner.

Once you’ve poured the baking soda and vinegar into a drain, you should wait about 10 minutes for the mixture to break down the clog. If you try the baking soda and vinegar method and it doesn't work, you can do it again or try the baking soda and salt trick.

The Cornish, NH homeowners’ guide to french drain services

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

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