
Serving Onalaska, WA and surrounding areas
Approved
In business since 2005
Free estimates
Warranties offered
"Had a sump pump installed. Haven’t had a repeat of the problem."





+33

*The Angi rating for Basement Waterproofing companies in Onalaska, WA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.
*The HomeAdvisor rating for Basement Waterproofing companies in Onalaska, WA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.
Last update on July 29, 2026

Serving Onalaska, WA and surrounding areas
Approved
In business since 2005
Free estimates
Warranties offered
"Had a sump pump installed. Haven’t had a repeat of the problem."





+33

Serving Onalaska, WA and surrounding areas
Approved
In business since 2025
Free estimates
Credit card accepted
"We’re extremely pleased with our new asphalt paved driveway. From start to finish, the communication was clear, the workmanship was top-quality, and everything was completed on schedule. The crew were professional, respectful, and left the site clean every day. The finished result looks great and feels solid. I wouldn’t hesitate to recommend them."





+10

Serving Onalaska, WA and surrounding areas
Approved (Corporate)
In business since 1995
Free estimates
Emergency services offered
"They made my cracked driveway look like new. With the stabilizing they did, itâ ll last another 100 years! Very happy with my basement also!"





+16

Serving Onalaska, WA and surrounding areas
Approved
In business since 2021
Free estimates
Emergency services offered
"We’ve had a lot of crews in our home for various projects over the years, and I have to say this was one of the most courteous. They worked hard, navigating through our kitchen to access the basement and I really appreciated their efforts. Thank you MTU, we now have safe walls in our cellar and fresh beams to keep the house standing ;)"





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."





+18

Serving Onalaska, 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!!"





+11

Serving Onalaska, 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!"





+31
Serving Onalaska, WA and surrounding areas
In business since 2011
Free estimates
"It went as well as can be expected. He was on time (early in fact), did the work, charged what he quoted, and left everything clean.
"

Serving Onalaska, WA and surrounding areas
In business since 2020
Free estimates
Emergency services offered
"Great. Jerrod made evening time available, was on time, very professional, checked and double-checked work. No problems since the work was done. Price was reasonable. Will definitely call again."





+69

Serving Onalaska, WA and surrounding areas
In business since 2021
Free estimates
Emergency services offered
"Immediate call back when requested quote, and great service. Crew workers are hard working and respectful. The work performed went way beyond the basics... from cutting down 3 ft weeds, removing debris, spraying for weed control, trimming under bushes, cleaning up edges of flower bed, and then spreading bark. I would hire them again, and recommend this company ?."





+8
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