Top-rated french drain pros.

Best french drain pros near Cosmopolis, WA

Enter your zip and get matched with up to 5 pros

Need a pro for your french drain service project in Cosmopolis, WA?

Select your specific project to find the pro for you.

TRUSTED BY COSMOPOLIS, WA HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon100
    Verified french drain services reviews

Verified Reviews for French Drain Service pros in Cosmopolis, WA

*The Angi rating for French Drain Service companies in Cosmopolis, WA 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 Cosmopolis, WA 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 January 21, 2026

Top-Rated French drain pros in Cosmopolis - Updated Nov 2026

Avatar for Groundworks
Groundworks
4.3(
314
)
Sump Pump or Interior Foundation Drains - InstallBasement Drainage Channels - Install

Serving Cosmopolis, WA and surrounding areas

Approved (Corporate)

In business since 1995

Free estimates

Emergency services offered

"Danila and Valeri did an excellent job on repairing the concrete on my driveway! These gentlemen are geniuses! I am very satisfied with their work!"
Foundation
Foundation
Foundation
Concrete
Concrete

+16

Response time2 days
123 neighbors recently requested a quote
Recommended by83%of homeowners
Request Quote
Avatar for TerraFirma
TerraFirma
4.0(
100
)
Foundation Drainage - Install or ReplaceSump Pump or Interior Foundation Drains - InstallBasement Drainage Channels - Install

Serving Cosmopolis, WA and surrounding areas

Approved

In business since 2005

Free estimates

Warranties offered

"I had a patio that was in need of leveling. They knew exactly what to do and did it in a day. It looks great and I am very happy."
A System Design Specialist helping a homeowner
Encapsulating a crawl space
Fleet of vehicles in our Portland, Oregon locatio
Loading up our truck for a piering job
Loading up a truck for a waterproofing job

+33

Response time2 hrs
Response rate100%
88 neighbors recently requested a quote
Request Quote
Avatar for Pinpoint Construction LLC
Pinpoint Construction LLC
5.0(
7
)
Basement Drainage Channels - Install

Serving Cosmopolis, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Credit card accepted

"I had a great experience with this team; they were skilled and professional throughout the excavation and grading process. Their attention to detail and reliable service left me feeling confident and fully satisfied, so I would definitely recommend them to anyone needing quality work and exceptional service."
Gravel driveway
Ruts in the driveway which causing the water to run down the driveway?
Well utility trench
Gravel driveway
Driveway work in North Kitsap

+15

1 neighbors recently requested a quote
Recommended by50%of homeowners
Request Quote
Avatar for TMR Excavation
TMR Excavation
New to Angi
Foundation Drainage - Install or Replace

Serving Cosmopolis, WA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

TMR Excavation LLC is a locally owned excavation company serving Southwest Washington with affordable, high-quality dirt work. We specialize in residential projects including Site prep, Shop pads, Driveway installs, land clearing, grading, trenching, drainage solutions, brush removal, and more. With 10 years of experience working for top regional contractors in both heavy civil and residential jobs, we bring the experience to the private sector — offering honest service, transparent process, expert results, and a job done right. From the first estimate to the final grade, we take pride in getting your project done for you!

8 neighbors recently requested a quote
Request Quote
Avatar for Expedeck
Expedeck
5.0(
24
)
Basement Drainage Channels - InstallYard Drainage

Serving Cosmopolis, WA and surrounding areas

In business since 2015

Free estimates

Credit card accepted

"The workers were hard working. Did a great job. The only concern we had was the lack of attention to the workers: no porta potty and no machinery to help carry the heavy concrete. Still waiting for the $250 gift card reward, lol!"
Andrew Farjo
Landscape Lighting with retaining walls
Accent wall / Seating wall with LED lighting
Andrew Farjo
Andrew Farjo

+31

Recommended by100%of homeowners
Request Quote
Avatar for Creekside Excavation & Hauling LLC
Creekside Excavation & Hauling LLC
5.0(
7
)
Basement Drainage Channels - InstallDrain Clog or Blockage - ClearDrain Clog or Blockage - Clear - For Business+4 more

Serving Cosmopolis, WA and surrounding areas

In business since 2021

Free estimates

Emergency services offered

"Excellent company to work with. On time and professional. Will definitely work with again."
Foundation dig out & Pad Compaction
Land before road & landscaping
Progress including tree clearing
Finished Product
Additional Photos

+8

Recommended by100%of homeowners
Request Quote
Avatar for Pacific Water Damage
Pacific Water Damage
4.4(
42
)
Drain Line Breakage - Camera LocateDrain Line Breakage - Camera Locate - For BusinessSump Pump or Interior Foundation Drains - Install

Serving Cosmopolis, WA and surrounding areas

In business since 1988

Free estimates

Emergency services offered

"Did what they said they would do
Kept the dust and mess in a controlled area and cleaned everything up afterwards
"
Recommended by93%of homeowners
Request Quote
Avatar for TerraFirma Foundation Systems
TerraFirma Foundation Systems
4.7(
12
)
Basement Drainage Channels - InstallFoundation Drainage - Install or Replace

Serving Cosmopolis, WA and surrounding areas

In business since 2005

Free estimates

Warranties offered

"So far so good. Rained hard last night and no evidence of flooding. We now have wall-to-wall carpeting so it better work!!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+11

Response time8 hrs
Response rate100%
Recommended by80%of homeowners
Request Quote
Avatar for Leveled Excavating 8, LLC
Leveled Excavating 8, LLC
5.0(
6
)
Basement Drainage Channels - InstallFoundation Drainage - Install or Replace

Serving Cosmopolis, WA and surrounding areas

In business since 2020

Free estimates

Credit card accepted

"Very friendly and timely. Arrived on time and completed ahead of schedule. Everything is operating perfectly. I will definitely use Level again and refer to my friends."
Infiltration Fix
Clearing of old patio
Infiltration Fix
Old driveway
Septic Installation

+37

Recommended by66%of homeowners
Request Quote
Showing 1-10 of 47
French Drains FAQs, answered by experts

To prevent drain clogs, perform regular maintenance and cleaning. Avoid disposing of substances like grease or coffee grounds down the sink. Additionally, installing and routinely using drain strainers can help catch debris and prevent blockages from forming.

The cost to unclog a drain varies based on the location and severity of the clog. For simple clogs within your home, such as in a sink, toilet, or shower, hiring a plumber typically costs between $110 and $350, with an average of around $200. Snaking a toilet or sink usually costs between $110 and $275, while a bathtub or shower clog costs about $225.

For a more serious clog in the main sewer line, the cost is higher. Clearing a main line clog generally costs between $200 and $600, with an average of about $380. However, prices can range from as low as $100 for snaking a minor clog to over $1,600, particularly if advanced methods like video inspection and hydrojetting are needed for a large or hard-to-reach blockage. Some severe main line clogs can cost upwards of $1,000 to clear depending on factors like the cause of the clog, its distance from an accessible cleanout, and whether the pipe is located beneath an occupied space (e.g., in an apartment building). You may be able to save money on minor clogs by using a drain snake or bladder yourself.

The best drain cleaners are biodegradable ones or a mixture of baking soda and vinegar. Strong, caustic chemicals may seem appealing with promises of unclogging your drain quickly, but liquid drain cleaners can cause damage to your pipes over time. Consider making your own drain cleaner with baking soda and vinegar.

While you don’t have to run out and immediately buy a new toilet at the first sign of a clog, if the toilet keeps clogging because it’s a low-flow or poorly designed model, a new toilet may be the way to go. If your toilet keeps clogging, you can try using less toilet paper, adjusting the fill valve, checking the toilet vent pipe on the roof, and using a toilet auger to make sure nothing is stuck in the pipe or trap.

Flushing the toilet only to realize it’s clogged can cause anxiety. To avoid a clogged toilet, use less toilet paper. If you notice that the toilet is flushing and refilling slower than usual, you can use a plunger to clear clogs in the S-trap. If that doesn’t work, call a plumber to check your system and possibly clear the drain lines.

The Cosmopolis, WA homeowners’ guide to french drain services

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

See all articles