Top-rated basement waterproofing pros.

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There are 13 highly-rated local basement waterproofing pros.

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  • Verified reviews icon86
    Verified basement waterproofing services reviews

Find Basement waterproofing pros in Maple Valley

Avatar for Rain Pros Inc

Rain Pros Inc

31620 23rd Ave S, #306
4.76(
413
)
Approved Pro

Rain Pros Inc

31620 23rd Ave S, #306
4.76(
413
)
Approved Pro
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
397 local quotes requested

Rain Pros is Puget Sounds premier full-service sprinkler and drainage company, with a reputation of unmatched customer service and exceptional quality. Our professionals have years of experience in drainage and irrigation installation, repair and maintenance. We are very proud to be growing company and leader in each of our fields. For bid requests regarding the installation of a new sprinkler or drainage system please email our general manager ([email protected]). For drainge repair and inspection requests please contact our service coordinator at (253) 678-7111, additionally you can email- [email protected] to immediately cue for with our service department.

"The work was done quickly and efficiently. Communication was very easy, clear, pleasant. The work was very good and I highly recommend them. The clean up wasn't thorough so they sent someone out immediately to finish the job."

Joan G on September 2025

Rain Pros is Puget Sounds premier full-service sprinkler and drainage company, with a reputation of unmatched customer service and exceptional quality. Our professionals have years of experience in drainage and irrigation installation, repair and maintenance. We are very proud to be growing company and leader in each of our fields. For bid requests regarding the installation of a new sprinkler or drainage system please email our general manager ([email protected]). For drainge repair and inspection requests please contact our service coordinator at (253) 678-7111, additionally you can email- [email protected] to immediately cue for with our service department.

"The work was done quickly and efficiently. Communication was very easy, clear, pleasant. The work was very good and I highly recommend them. The clean up wasn't thorough so they sent someone out immediately to finish the job."

Joan G on September 2025


Avatar for TerraFirma Foundation Systems

TerraFirma Foundation Systems

932 Industry Dr
5.00(
8
)
Approved Pro

TerraFirma Foundation Systems

932 Industry Dr
5.00(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
86 local quotes requested

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"Great; competitive price, installation went great, friendly and responsive staff in person and office"

Andrew M on February 2020

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"Great; competitive price, installation went great, friendly and responsive staff in person and office"

Andrew M on February 2020


Avatar for Groundworks

Groundworks

18915 16th Ave S
4.44(
162
)
Approved Pro

Groundworks

18915 16th Ave S
4.44(
162
)
Approved Pro
Customers say: Super punctual
22 local quotes requested
28 years of experience

Groundworks, formerly, Matvey Foundation Repair is the leading structural and concrete repair firm in Western Washington. We specialize in repairing residential and commercial foundations, concrete slabs, bowing/cracked basement walls, sinking floors, concrete porches, settling/cracked foundations, and other structural issues. We raise and level concrete pavements, driveways, and sidewalks. We also offer basement waterproofing. Our expert design technicians provide professional services for commercial, residential, industrial, government, and municipal applications with award-winning products and superior customer service. CALL US TODAY FOR A FREE ESTIMATE! GROUN**76305

"Very informative. Clear and concise. Gave us many options. Daniel is a wonderful and honest person and was so helpful with our questions. The crew lead by Anthony, with Jordan, Uriel, and Richard did professional work. The finished product is wonderful and can already feel the results in the house. Would 1000% recommend. Just keep in mind it is a very messy job. These guys do the best they can to keep it clean"

Charles W on May 2025

Groundworks, formerly, Matvey Foundation Repair is the leading structural and concrete repair firm in Western Washington. We specialize in repairing residential and commercial foundations, concrete slabs, bowing/cracked basement walls, sinking floors, concrete porches, settling/cracked foundations, and other structural issues. We raise and level concrete pavements, driveways, and sidewalks. We also offer basement waterproofing. Our expert design technicians provide professional services for commercial, residential, industrial, government, and municipal applications with award-winning products and superior customer service. CALL US TODAY FOR A FREE ESTIMATE! GROUN**76305

"Very informative. Clear and concise. Gave us many options. Daniel is a wonderful and honest person and was so helpful with our questions. The crew lead by Anthony, with Jordan, Uriel, and Richard did professional work. The finished product is wonderful and can already feel the results in the house. Would 1000% recommend. Just keep in mind it is a very messy job. These guys do the best they can to keep it clean"

Charles W on May 2025


Avatar for Andy Construction LLC

Andy Construction LLC

2333 NE 94th St
4.85(
27
)
Approved Pro

Andy Construction LLC

2333 NE 94th St
4.85(
27
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
16 local quotes requested

We are not a big company that you have to go through all the phone calls. Owner Andy Zhang will be the one to answer the phone, provide you the bid, and supervise and inspect the work before finish. We are so confident in our work, quality, and over all experience that we don't need any money down. Our customers don't pay us anything until the work is done and customer is happy! For a house on the market, in most cases, we allow owner pay the full bill through escrow at closing. We pride ourselves in treating every customer with honestly.We looking forward to hear and serve you soon!

"They did a great job"

Chris D on May 2025

We are not a big company that you have to go through all the phone calls. Owner Andy Zhang will be the one to answer the phone, provide you the bid, and supervise and inspect the work before finish. We are so confident in our work, quality, and over all experience that we don't need any money down. Our customers don't pay us anything until the work is done and customer is happy! For a house on the market, in most cases, we allow owner pay the full bill through escrow at closing. We pride ourselves in treating every customer with honestly.We looking forward to hear and serve you soon!

"They did a great job"

Chris D on May 2025


Avatar for Wu Construction

Wu Construction

13333 Lake City Way NE
4.64(
230
)
Approved Pro

Wu Construction

13333 Lake City Way NE
4.64(
230
)
Approved Pro
Customers say: Super punctual
47 local quotes requested
42 years of experience

Wu Construction Inc, specializes in drainage and foundation systems construction and repair. Since our founding in 1983, we have successfully completed thousands of projects for homeowners and businesses throughout the Northwest. We are the best in our industry, and well regarded by our customers for our excellent service. We are lauded for our speedy responses to inquiries, our efficiency and the quality of our work.

"Great communication and thorough work. Would hire again."

Brian J on April 2025

Wu Construction Inc, specializes in drainage and foundation systems construction and repair. Since our founding in 1983, we have successfully completed thousands of projects for homeowners and businesses throughout the Northwest. We are the best in our industry, and well regarded by our customers for our excellent service. We are lauded for our speedy responses to inquiries, our efficiency and the quality of our work.

"Great communication and thorough work. Would hire again."

Brian J on April 2025


Avatar for P4 Construction, LLC

P4 Construction, LLC

19680 146th St SE
5.00(
2
)
Approved Pro

P4 Construction, LLC

19680 146th St SE
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
12 years of experience

We are a locally owned and operated company that values honesty and integrity, and treats your home as if it were our own. We offer drainage services our job is to control and direct water away from your home or building.We have 13 years in the drainage field and specialize in,waterproofing foundation walls,basement drainage,yard drains,french drains,crawlspace interior drain systems,sump pump installations and replacement,new pvc downspout drain pipe installations,clean and or repair downspout pipes.You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with,we work with the best materials out there.We take pride on what we do.Our hard work speaks for itself.We look forward on helping you with your drainage projects.

"We hired them to install a 40 foot french drain. Eric was very knowledgeable and professional, not to mention a very nice person and good listener. He was punctual and he and his crew were extemely hard workers. The job functions as promised, looks great and they were very conscientious about how they left the work area neat and clean. I wish I could hire them for other projects."

Bill G on June 2024

We are a locally owned and operated company that values honesty and integrity, and treats your home as if it were our own. We offer drainage services our job is to control and direct water away from your home or building.We have 13 years in the drainage field and specialize in,waterproofing foundation walls,basement drainage,yard drains,french drains,crawlspace interior drain systems,sump pump installations and replacement,new pvc downspout drain pipe installations,clean and or repair downspout pipes.You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with,we work with the best materials out there.We take pride on what we do.Our hard work speaks for itself.We look forward on helping you with your drainage projects.

"We hired them to install a 40 foot french drain. Eric was very knowledgeable and professional, not to mention a very nice person and good listener. He was punctual and he and his crew were extemely hard workers. The job functions as promised, looks great and they were very conscientious about how they left the work area neat and clean. I wish I could hire them for other projects."

Bill G on June 2024


Avatar for Attic Doctor LLC

Attic Doctor LLC

10333 NE 1st St #154
5.00(
15
)
Approved Pro

Attic Doctor LLC

10333 NE 1st St #154
5.00(
15
)
Approved Pro
Super Service Award
Customers say: Quick response
148 local quotes requested
2 years of experience

Welcome to your one-stop shop for insulation, rodents and mold! Attic Doctor is a local, licensed contractor providing eco-friendly solutions to all of your attic and crawl space problems. Scratching sounds coming from the attic, when you’re trying to sleep? Mold destroying your roof and air quality? Losing your mind over heating and cooling costs? Call the Attic Doctor!

"Rodent exclusion work - they keep coming back until it’s done! No other rodent exclusion outfits I had out offered any kind of guarantee. After 6 months I needed them again and they were here in a flash! Amazing customer service. "

Anja C on July 2025

Welcome to your one-stop shop for insulation, rodents and mold! Attic Doctor is a local, licensed contractor providing eco-friendly solutions to all of your attic and crawl space problems. Scratching sounds coming from the attic, when you’re trying to sleep? Mold destroying your roof and air quality? Losing your mind over heating and cooling costs? Call the Attic Doctor!

"Rodent exclusion work - they keep coming back until it’s done! No other rodent exclusion outfits I had out offered any kind of guarantee. After 6 months I needed them again and they were here in a flash! Amazing customer service. "

Anja C on July 2025


CM Development and Construction, LLC

2727 Western Avenue, Suite 3A
New on AngiNew on Angi
Approved Pro

CM Development and Construction, LLC

2727 Western Avenue, Suite 3A
New on AngiNew on Angi
Approved Pro
98 local quotes requested
25 years of experience

Based in the heart of Seattle, we are a trusted masonry repair business dedicated to preserving the structural integrity and aesthetic beauty of your buildings. We specialize in a comprehensive range of services, including brick and stone repointing, facade restoration, lintel replacement, and waterproofing. Our team of skilled and experienced masons utilizes traditional techniques combined with modern materials to deliver lasting results that withstand the city's unique environmental challenges. We understand the specific needs of Manhattan's diverse architecture, from historic brownstones to modern high-rises, and we are committed to providing meticulous craftsmanship, transparent communication, and exceptional customer service on every project. Whether it's a small repair or a large-scale restoration, we are the reliable choice for ensuring your building remains safe, sound, and visually stunning.

Based in the heart of Seattle, we are a trusted masonry repair business dedicated to preserving the structural integrity and aesthetic beauty of your buildings. We specialize in a comprehensive range of services, including brick and stone repointing, facade restoration, lintel replacement, and waterproofing. Our team of skilled and experienced masons utilizes traditional techniques combined with modern materials to deliver lasting results that withstand the city's unique environmental challenges. We understand the specific needs of Manhattan's diverse architecture, from historic brownstones to modern high-rises, and we are committed to providing meticulous craftsmanship, transparent communication, and exceptional customer service on every project. Whether it's a small repair or a large-scale restoration, we are the reliable choice for ensuring your building remains safe, sound, and visually stunning.


Avatar for Envirosmart Solution Inc

Envirosmart Solution Inc

330 SW 43rd Street Suite K267
5.00(
1
)
Approved Pro

Envirosmart Solution Inc

330 SW 43rd Street Suite K267
5.00(
1
)
Approved Pro
24 local quotes requested
21 years of experience

We are a local family-owned business that opened its doors in 2004 with our main goal of providing the best customer experience that we can to every single customer from the smallest to the biggest projects and maintain a long term relationship. We are ONE-STOP-SHOP for ALL Energy Efficiency needs. We are located in Renton, WA and gladly serving over 25 cities in the Washington Puget sound area. Our affordable, licensed, insured, and trained workers are here to help make your home safe, energy-efficient and comfortable. We can do: Energy efficiency upgrades and planning, Attic & Crawl space clean up and decontamination, Attic & Crawl space insulation installation. Vapor & Radiant barriers installation. Air Ducts & Dryer vent cleaning & replacement. HVAC, Ventilation installation and repair. Solar fans. HVAC Lighting installation, Generators, Surge protectors.

We are a local family-owned business that opened its doors in 2004 with our main goal of providing the best customer experience that we can to every single customer from the smallest to the biggest projects and maintain a long term relationship. We are ONE-STOP-SHOP for ALL Energy Efficiency needs. We are located in Renton, WA and gladly serving over 25 cities in the Washington Puget sound area. Our affordable, licensed, insured, and trained workers are here to help make your home safe, energy-efficient and comfortable. We can do: Energy efficiency upgrades and planning, Attic & Crawl space clean up and decontamination, Attic & Crawl space insulation installation. Vapor & Radiant barriers installation. Air Ducts & Dryer vent cleaning & replacement. HVAC, Ventilation installation and repair. Solar fans. HVAC Lighting installation, Generators, Surge protectors.


Avatar for Iron Earth Construction LLC

Iron Earth Construction LLC

115 West Hill Street
5.00(
3
)
Approved Pro

Iron Earth Construction LLC

115 West Hill Street
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
43 local quotes requested

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our

"Very accommodating and great service and product"

Sally K on September 2023

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our

"Very accommodating and great service and product"

Sally K on September 2023

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Basement Waterproofing questions, answered by experts

Crawl space foundation problems can stem from a few different issues, but the most common are moisture and water problems and soil instability. Moisture and water issues are often a result of poor drainage, which can lead to water intrusion and soil expansion and contraction, leaving your foundation under added stress. A few things can cause soil instability, including poor drainage, karst landscapes and resulting sinkholes, and poorly compacted soil during construction.

It is better to have a crawl space that is tailored to the outside temperature, your needs, and the season. For example, it is much better to have a vented space when it’s very hot outside and your AC bills are sky-high. Conversely, when the temperature drops and humidity rises, it is almost always better to have your vents shut and covered if possible.

In most cases, yes, because the large majority of basements leak or will have moisture issues at some point, and waterproofing methods can mitigate that risk or eliminate it entirely. Plus, water and moisture issues can be quite problematic, as they can lead to mold growth, rotting of building materials, structural damage, poor indoor air quality, increased electric bills, and other problems.

Although the two terms are closely related and often used interchangeably, pier and beam foundations and crawl spaces are different things. A pier and beam foundation is made up of concrete piers and wooden beams and creates a space under the home known as a crawl space. There are several types of foundations that create crawl spaces, often collectively known as “crawl space foundations,” but the crawl space itself is separate from the foundation. 

French drains and yard grading systems are two highly effective ways to fix standing water around the foundation. Since the French drain uses a perforated pipe covered by gravel, you won’t have to worry about water taking the soil away from your foundation. Meanwhile, yard grading levels out the ground to prevent water from gathering around your foundation.

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The Maple Valley, WA homeowners’ guide to basement waterproofing services

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