*The Angi rating for Basement Waterproofing companies in Cosmopolis, 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 Cosmopolis, 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 August 11, 2026
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."
+33
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!"
+16
Serving Cosmopolis, 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 Cosmopolis, WA and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Credit card accepted
"Alex did a great job leveling my back yard. Hard work man. Totally recommend him"
+15
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!!"
+11
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!"
+31
Serving Cosmopolis, 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
Serving Cosmopolis, WA and surrounding areas
In business since 1977
Free estimates
Credit card accepted
"I love Francisco hes finished everything that he said he would."
Serving Cosmopolis, WA and surrounding areas
In business since 2020
Free estimates
Credit card accepted
"They did an excellent job!! Very impressed with the quality and professionalism!"
+37
Serving Cosmopolis, WA and surrounding areas
In business since 2023
Free estimates
Offers commercial services
"I was very happy to find Harbor Surface Solutions to renovate my garage floor. It turned out very nice, we are more than happy with the job. Monica helped us pick the colors and her crew did a really great job installing our new floor. Previously our garage floor was always wet and we worried about mold, but it’s now like indoor space, waterproof, dry and looks fantastic. We highly recommend Harbor Surface Solutions. Thank you Monica for a job well done."
+7
From average costs to expert advice, get all the answers you need to get your job done.
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