Top-rated basement waterproofing pros.

Best basement waterproofing pros near Sumas, WA

Enter your zip and get matched with up to 5 pros

Top-Rated Basement waterproofing pros in Sumas - Updated Nov 2026

Near Me Roofing Company
5.0(
74
)
Basement Drainage Channels - Repair

Serving Sumas, WA and surrounding areas

Approved

In business since 2012

Free estimates

Credit card accepted

"Excellent service and very thorough with explanation and getting the right. I researched many skylight installation companies and decided to hire Ari and Elijah. I will recommend my colleagues and friends and family. I will absolutely use this roofing company for any roof work on my house."
Response time4 days
Recommended by80%of homeowners
Avatar for MTU Services LLC
MTU Services LLC
5.0(
5
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Sumas, 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 ;)"
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 American Concrete N Masonary
American Concrete N Masonary
5.0(
6
)
Basement Drainage Channels - Install

Serving Sumas, WA and surrounding areas

In business since 1990

Free estimates

Emergency services offered

"From the minute they got out of the truck to check our project, to give us a bid we knew they were the company we would hire. They seemed to know what we wanted by way of design and finish, before we spoke. Where other companies had said flat out “We won’t do this.” “Too much work removing old concrete.” Poor access.” Moli said, “Yes, this old concrete gotta go. But, it’s no problem. We bust it up. We take it out.” At the end of the first day all of the old concrete had been removed and taken away. At the end of day two all the forms were set. Day three was rebar and detail work making all ready for the pour. Day four The concrete was poured stamped and finished. On day five everything was picked up cleaned up and they were gone. These are good people. They do good work and they are as honest as the day is long."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+29

Recommended by100%of homeowners
Form To Function Landscaping LLC
4.4(
16
)
Basement Drainage Channels - Install

Serving Sumas, WA and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"I kind of questioned the cost after they did the job. What they actually did here looks pretty good. I just had surgery that time so I was in bed when they came out. They did it under 40 hours and did good work but they handed me another bill that was triple the price. The labor was okay but within that labor, they planted things for me. I had asked them to make it easy to maintain but they never discussed anything with me. I’m sure they upped the cost for the plants quite a bit. I don’t even know what plants they are. They did put in some bricks and they did a good job on that. I told them that I wanted some grooves leveled out in my yard and I realized afterwards that there were still some tracks in the yard. It was covered by grass but I pointed out where they were."
Additional Photos
Additional Photos
Arlington
Camano Island
Bothell

+25

Recommended by86%of homeowners
Showing 1-10 of 16
Basement Waterproofing FAQs, answered by experts

Anything having to do with the structure of your home, such as raising the ceiling, is usually the most expensive part of finishing a basement. Another project component that could be a surprisingly high expense is adding an exterior entrance. 

The cost of a walkout basement can be anywhere from $5,000 to $35,000.

Yes, if your crawl space is prone to humidity, a dehumidifier can help keep it dry. For use in a crawl space, you’ll need a high-capacity and high-efficiency dehumidifier with built-in air filtration. It’s also wise to purchase one with a self-draining feature. Otherwise, you’ll need to climb into the crawl space to empty the dehumidifier.

Several types of insulation are effective for crawl spaces, with spray foam and rigid foam boards being two of the best options. Closed-cell spray foam insulation is a strong choice because it effectively repels moisture, resists biological growth, seals the air, and provides excellent thermal protection, especially in hard-to-reach areas. Rigid foam insulation boards are another excellent material as they insulate well, resist water damage, and will not settle over time like fiberglass or cellulose.

Yes, it’s worth it to repair a crawl space foundation, even if the issue seems relatively minor. Foundation problems often get worse and more expensive to fix if you leave them untreated. Additionally, your entire home, from the framing and flooring to the roof system, relies on the foundation for even and level support. Issues with your foundation will almost always manifest as problems in and above your living space, so it’s important to find a solution.

Make sure you're calling in the right expert to help repair and/or clean your crawl space. A serious issue may require multiple experts that include a local mold remediation pro, an HVAC pro, a foundation pro, and a plumber. You should also consider using a nearby junk removal service to avoid handling debris that could be covered in mold, fungi, rot, or asbestos.

The Sumas, WA homeowners’ guide to basement waterproofing services

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