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TRUSTED BY ONALASKA, WA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon69
    Verified french drain services reviews

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

Avatar for Black Hills, Inc.
Black Hills, Inc.
4.5(
606
)
Drain Clog or Blockage - ClearDrain Line Breakage - Camera LocateSump Pump or Interior Foundation Drains - Install

Serving Onalaska, WA and surrounding areas

Approved (Corporate)

In business since 1993

Free estimates

Emergency services offered

"Technician Curtis Robinson arrived on time and quickly diagnosed my heat pump issue, found the broken part, repaired my unit and made sure my furnace was working as well. Excellent customer service and very thorough. Very satisfied customer!"
Furnace
Heat Pump
Heat Pump
Furnace
Mini Split

+12

Response time1 day
4 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Groundworks
Groundworks
4.3(
314
)
Sump Pump or Interior Foundation Drains - InstallBasement Drainage Channels - Install

Serving Onalaska, WA and surrounding areas

Approved (Corporate)

In business since 1995

Free estimates

Emergency services offered

"Wyatt, Zane, Tucker and Oliver were fantastic. Customer service was fantastic and they finished their work quickly and professionally. I'll definitely be recommending and contacting for any drainage needs down the road."
Foundation
Foundation
Foundation
Concrete
Concrete

+16

Response time2 days
121 neighbors recently requested a quote
Recommended by83%of homeowners
Rainier Plumbing, LLC
5.0(
3
)
Drain Clog or Blockage - ClearSump Pump or Interior Foundation Drains - Install

Serving Onalaska, WA and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

Recommended by100%of homeowners
Avatar for MTU Services LLC
MTU Services LLC
5.0(
5
)
Foundation Drainage - Install or ReplaceBasement Drainage Channels - InstallSump Pump or Interior Foundation Drains - Install

Serving Onalaska, WA and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

Protect the investment you’ve made with the knowledgeable team at MTU Services LLC. We are your local basement and foundation experts serving all of Washington state and North Idaho. We offer customized basement waterproofing, foundation repair, concrete crack repair, and basement sump pump solutions and egress windows for your home. Contact MTU Services LLC today to learn more about how we can help you protect your home. Give us a call to request a quote or to schedule service.\n\nServices include: leaking basement or crawl space repairs, foundation cracks repaired, lifting piers and levelling for your home or building, sup um systems and more.

Elevator pit waterproofing and sealing
Piers under an existing home
Piers under an existing homes middle wall
Solutions/Answers
Response time1 day
Response rate100%
4 neighbors recently requested a quote
Avatar for Diversified Crawlspace Servs
Diversified Crawlspace Servs
3.9(
25
)
Foundation Drainage - Install or Replace

Serving Onalaska, WA and surrounding areas

Approved

In business since 1992

Free estimates

Emergency services offered

"We had a foot of water in our crawl space after the snow and 6 in. of rain from the December 2021 storms. I had called several companies to come out to take a look and give quotes. Ethan from diversified was the 3rd quote we received. Ethan explained the issue, explained what they would do to remedy it, and answered all my questions. He sent me the quote which was very resonable. BE SURE TO GET SEVERAL QUOTES. ONE COMPANY QUOTED US DOUBLE OF WHAT WE PAID DIVERSIFIED. They were able to get a team out two days later. The team was on time, professional, and did really good work. We ended up needing a sump pump due to ground water coming up. They applied a mold application and completed the work in a day. I highly recommend these guys and did my research prior to having them do the work. I am very impressed and happy we chose them."
crawlspace drainage
crawlspace drainage
crawlspace drainage
crawlspace drainage
crawlspace drainage

+18

6 neighbors recently requested a quote
Recommended by60%of homeowners
Avatar for TMR Excavation
TMR Excavation
New to Angi
Foundation Drainage - Install or Replace

Serving Onalaska, 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
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French Drains FAQs, answered by experts

A two-way cleanout can help if there’s already a clog, but the best strategy to prevent one is by not rinsing grease, oil, or fat down your drains, not flushing or rinsing coffee grounds or egg shells down your drains, flushing only human waste and toilet paper (so no diapers, period products, bathroom wipes, or paper towels), and using drain guards on all of your drains.

In some cases, operating a snake can damage your drain and pipes. This depends on the overall condition of your pipes and how gently you operate the auger. For instance, older galvanized pipes covered in zinc are susceptible to scratches when using a drain snake. Additionally, it’s common for newbies to apply too much force when extending the snake, leading to scratches and related damage. You can also crack the porcelain with an electric auger if you’re snaking a toilet drain. If you’re using a manual snake or auger, the risk is minimal.

Boiling water helps unclog a drain, but usually only with a harder abrasive such as baking soda or vinegar. On its own, it isn’t the most effective tool. In addition, you shouldn’t use boiling water if you have PVC pipes, as it can soften or melt them. Use a plunger or enlist the help of a pro if you have plastic pipes.

It is generally not recommended to pour hot or boiling water down a drain to unfreeze pipes due to significant risks. In some cases, the sudden temperature change can cause more ice buildup or produce steam, which increases pressure and could cause the pipe to burst, leading to costly damage and potential burn injuries. While hot water might help with a partially frozen drainpipe, it is unlikely to thaw a completely blocked water pipe further down the system. Additionally, boiling water can damage plastic pipes over time. Safer and more effective methods include using a space heater near the frozen section or applying hot towels directly to the pipe.

It is safe to flush small amounts of bleach down the toilet. Don’t flush more than ¼ cup of bleach. Instead, consider diluting it and pouring it down the sink drain.

The Onalaska, WA homeowners’ guide to french drain services

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