Top-rated foundation, basement or crawlspace waterproofing / encapsulation pros.

Get matched with top foundation, basement or crawlspace waterproofing / encapsulation pros in your area

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Foundation, basement or crawlspace waterproofing / encapsulation pros in Seattle

Avatar for TotalFix Contractors LLC
TotalFix Contractors LLC
19128 112TH AVE NE APT 426,
5.00(
4
)
Approved Pro
TotalFix Contractors LLC
19128 112TH AVE NE APT 426,
5.00(
4
)
Approved Pro
1 years of experience
Free onsite estimate

At TotalFix Contractors LLC, we specialize in high-quality fencing, concrete work, foundation repairs, and drainage solutions across the Seattle area. Whether it?s a new installation, repairs, or upgrades, our experienced team delivers reliable results with a focus on durability and customer satisfaction. We serve both residential and commercial clients with honest pricing, fast turnaround, and clean work.

"We had our crawl space fully replaced and the team did an amazing job. They were on time, worked fast, and explained everything clearly. The new vapor barrier and drainage look great, and our home feels much better now. Very professional and easy to work with. Highly recommend!"

Susie H on June 2025

At TotalFix Contractors LLC, we specialize in high-quality fencing, concrete work, foundation repairs, and drainage solutions across the Seattle area. Whether it?s a new installation, repairs, or upgrades, our experienced team delivers reliable results with a focus on durability and customer satisfaction. We serve both residential and commercial clients with honest pricing, fast turnaround, and clean work.

"We had our crawl space fully replaced and the team did an amazing job. They were on time, worked fast, and explained everything clearly. The new vapor barrier and drainage look great, and our home feels much better now. Very professional and easy to work with. Highly recommend!"

Susie H on June 2025


Avatar for Insulation Co., LLC - Removal & Clean Outs
Insulation Co., LLC - Removal & Clean Outs
20508 Cypress Way
4.95(
143
)
Approved Pro
Insulation Co., LLC - Removal & Clean Outs
20508 Cypress Way
4.95(
143
)
Approved Pro
Super Service Award
Customers say: True professional
16 years of experience
Free onsite estimate

Insulation Co. LLC - your premier insulation partner since 2008, is right in the heart of Seattle and extends our services throughout Western Washington. As the regions trusted attic and crawl space specialists, we bring a wealth of experience and expertise to every project. We specialize in creating pristine, energy-efficient spaces and offer comprehensive attic and crawl space services. Our expert insulation removal and replacement services, along with thorough cleaning, ensure your home is always in top shape. We are skilled in removing and remediating molds and enhancing air quality with professional duct insulation and sealing. Our skilled team also provides rodent proofing ensuring your home remains a sanctuary free of unwanted guests. We upgrade your home's defenses with our robust crawl space doors, vapor barriers, and air-sealing techniques. For moisture issues, we offer sump pump and French drain solutions. For manufactured homes, we provide specialized crawl space services.

"I was referred by a local contractor. Customer service was great. Phone call resulted in quick proposal emailed. Once accepted, work scheduled timely. Crew showed up as stated in scheduling. 4 1/2 hrs later, job complete. Crew was friendly & cleaned up all debris. I am very happy w/results. They helped me with applying for gas utility rebate as well. "

Colleen M on June 2025

Insulation Co. LLC - your premier insulation partner since 2008, is right in the heart of Seattle and extends our services throughout Western Washington. As the regions trusted attic and crawl space specialists, we bring a wealth of experience and expertise to every project. We specialize in creating pristine, energy-efficient spaces and offer comprehensive attic and crawl space services. Our expert insulation removal and replacement services, along with thorough cleaning, ensure your home is always in top shape. We are skilled in removing and remediating molds and enhancing air quality with professional duct insulation and sealing. Our skilled team also provides rodent proofing ensuring your home remains a sanctuary free of unwanted guests. We upgrade your home's defenses with our robust crawl space doors, vapor barriers, and air-sealing techniques. For moisture issues, we offer sump pump and French drain solutions. For manufactured homes, we provide specialized crawl space services.

"I was referred by a local contractor. Customer service was great. Phone call resulted in quick proposal emailed. Once accepted, work scheduled timely. Crew showed up as stated in scheduling. 4 1/2 hrs later, job complete. Crew was friendly & cleaned up all debris. I am very happy w/results. They helped me with applying for gas utility rebate as well. "

Colleen M on June 2025


Avatar for Attic Doctor LLC
Attic Doctor LLC
10333 NE 1st St #154
5.00(
14
)
Approved Pro
Attic Doctor LLC
10333 NE 1st St #154
5.00(
14
)
Approved Pro
Super Service Award
Customers say: Quick response
70 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!

"Great job done"

Kyle R on January 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!

"Great job done"

Kyle R on January 2025


Avatar for Groundworks
Groundworks
18915 16th Ave S
4.58(
77
)
Approved Pro
Groundworks
18915 16th Ave S
4.58(
77
)
Approved Pro
Super Service Award
Customers say: True professional
80 local quotes requested
30 years of experience

Groundworks specializes in helping homeowners with their residential and commercial foundation repair, basement waterproofing and wall repair, and concrete repair needs. Our top priority is providing high-quality home repair solutions and personalized service across the Seattle area. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation.

"Charles, Ty W., and Ty G. performed beyond expectation. They finished the job ahead of schedule and communicated well throughout the entire process. I will definitely contract with them again for any future project. "

Scott S on May 2025

Groundworks specializes in helping homeowners with their residential and commercial foundation repair, basement waterproofing and wall repair, and concrete repair needs. Our top priority is providing high-quality home repair solutions and personalized service across the Seattle area. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation.

"Charles, Ty W., and Ty G. performed beyond expectation. They finished the job ahead of schedule and communicated well throughout the entire process. I will definitely contract with them again for any future project. "

Scott S on May 2025


Avatar for John's Waterproofing Co.
John's Waterproofing Co.
219 Airport Road
4.86(
51
)
Approved Pro
John's Waterproofing Co.
219 Airport Road
4.86(
51
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
41 local quotes requested

John's Waterproofing Co. is the premier waterproofing company serving in Oregon and Washington for over 50 years. We Specialize in Basement and Crawlspace Waterproofing and Repairs, we offer free inspections and estimates along with caring customer service. Contact our office today for your waterproofing needs!

"John’s was quick to respond and were able to get us on the schedule quickly. They communicated effectively and did quality work. I will work with John’s again."

Matt H on October 2022

John's Waterproofing Co. is the premier waterproofing company serving in Oregon and Washington for over 50 years. We Specialize in Basement and Crawlspace Waterproofing and Repairs, we offer free inspections and estimates along with caring customer service. Contact our office today for your waterproofing needs!

"John’s was quick to respond and were able to get us on the schedule quickly. They communicated effectively and did quality work. I will work with John’s again."

Matt H on October 2022


Avatar for TerraFirma Foundation Systems
TerraFirma Foundation Systems
10111 South Tacoma Way Unit D5
4.51(
65
)
Approved Pro
TerraFirma Foundation Systems
10111 South Tacoma Way Unit D5
4.51(
65
)
Approved Pro
Customers say: Quick response
50 local quotes requested
20 years of experience

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.

"Had huge foundation problems at a project of mine on the waterfront. We used terrafirma to both waterproof the entire basement AND lift the foundation. 10/10 would recommend. extremely communicative, very knowledgeable, and even brought a crew in from Oregon to help us stay on schedule. Oscar and jorge got the job done extremely quickly and Seth was fantastic as my project manager. "

Ian G on May 2025

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.

"Had huge foundation problems at a project of mine on the waterfront. We used terrafirma to both waterproof the entire basement AND lift the foundation. 10/10 would recommend. extremely communicative, very knowledgeable, and even brought a crew in from Oregon to help us stay on schedule. Oscar and jorge got the job done extremely quickly and Seth was fantastic as my project manager. "

Ian G on May 2025


Avatar for JP Ramos Construction
JP Ramos Construction
4614 S 282nd St
5.00(
1
)
Approved Pro
JP Ramos Construction
4614 S 282nd St
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
4 years of experience

I pride myself on my professionalism, as well as my ability to complete every job to the homeowner's total satisfaction. I never leave a job unfinished, or a homeowner not 100% satisfied with my level of service. We would welcome an opportunity to provide you with a no-obligation consultation so that we can gain a sense of your project needs and discuss how we can add to the beauty of your property’s appearance. Our services are reliable and efficient, I assure you that you will not be disappointed - Call today!

"Jesus And his Helper were awesome cleaning my roof and gutters. Very professional, hard working and fair priced. I would highly recommend them and I will most likely be a return customer!"

Randy R on April 2023

I pride myself on my professionalism, as well as my ability to complete every job to the homeowner's total satisfaction. I never leave a job unfinished, or a homeowner not 100% satisfied with my level of service. We would welcome an opportunity to provide you with a no-obligation consultation so that we can gain a sense of your project needs and discuss how we can add to the beauty of your property’s appearance. Our services are reliable and efficient, I assure you that you will not be disappointed - Call today!

"Jesus And his Helper were awesome cleaning my roof and gutters. Very professional, hard working and fair priced. I would highly recommend them and I will most likely be a return customer!"

Randy R on April 2023


Avatar for ROOF4LIFE
ROOF4LIFE
13459 108th Avenue Northeast
5.00(
8
)
Approved Pro
ROOF4LIFE
13459 108th Avenue Northeast
5.00(
8
)
Approved Pro
Customers say: Quality work
130 local quotes requested
12 years of experience

Roof4life Roofing Company Serving Homeowners in Seattle, Bothell, Everett, Tacoma, WA & All Other Surrounding Communities in the Puget Sound Region

"Mike and team were professional and impressed me by making sure that my broken front step was temporarily repaired for safety before the project got underway. Plus, they kept in contact by phone during all phases of the job. I highly recommend them."

Victoria E on December 2024

Roof4life Roofing Company Serving Homeowners in Seattle, Bothell, Everett, Tacoma, WA & All Other Surrounding Communities in the Puget Sound Region

"Mike and team were professional and impressed me by making sure that my broken front step was temporarily repaired for safety before the project got underway. Plus, they kept in contact by phone during all phases of the job. I highly recommend them."

Victoria E on December 2024


Avatar for King County Roofing & Exteriors, LLC
King County Roofing & Exteriors, LLC
8201 164th Ave NE Ste 200
New on HomeAdvisorNew on Angi
Approved Pro
King County Roofing & Exteriors, LLC
8201 164th Ave NE Ste 200
New on AngiNew on HomeAdvisor
Approved Pro
Free onsite estimate

With over 20 years is 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 business.

With over 20 years is 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 business.


Avatar for ACS - Seattle, LLC
ACS - Seattle, LLC
4742 42nd Avenue Southwest, Suite 500
4.54(
40
)
Approved Pro
ACS - Seattle, LLC
4742 42nd Avenue Southwest, Suite 500
4.54(
40
)
Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
19 local quotes requested

"Focused on your Satisfaction"-For over 21 years, Communication and Professionalism have been our top priorities. Consistently working hard to make your remodeling project a pleasant experience.

"Overall a good experience. We hired ACS to take down and rebuild a brick pillar supporting our front porch. Gary's crew was excellent. Although they only spoke Spanish they were helpful and did a good job communicating as much as they could about what they were doing and/or had done. We're very happy with the end product. Gary stayed true to his quote and the contract price. The project was more involved than I expected, but they came through and completed it on budget. My only complaint is that Gary was hard to get a hold of at times."

Stephanie S on August 2021

"Focused on your Satisfaction"-For over 21 years, Communication and Professionalism have been our top priorities. Consistently working hard to make your remodeling project a pleasant experience.

"Overall a good experience. We hired ACS to take down and rebuild a brick pillar supporting our front porch. Gary's crew was excellent. Although they only spoke Spanish they were helpful and did a good job communicating as much as they could about what they were doing and/or had done. We're very happy with the end product. Gary stayed true to his quote and the contract price. The project was more involved than I expected, but they came through and completed it on budget. My only complaint is that Gary was hard to get a hold of at times."

Stephanie S on August 2021

...
Showing 1-10 of 952

FAQs for foundation, basement or crawlspace waterproofing / encapsulation projects in Seattle, WA

Cleaning your crawl space is a worthwhile investment for several important reasons. A properly maintained crawl space prevents structural damage by eliminating moisture that can deteriorate wood supports and metal components. It also significantly improves your home's indoor air quality by removing allergens like mold spores and pest droppings that can circulate through your living spaces. 

Additionally, a clean crawl space contributes to better energy efficiency by allowing proper insulation installation and reducing humidity levels that force your HVAC system to work harder.

Several warning signs indicate your crawl space needs professional attention. Look for musty odors throughout your home, unexplained increases in allergy symptoms, higher energy bills, visible pest activity, or moisture issues. 

Other indicators include sagging floors, warped wood, visible mold growth, standing water, or damaged insulation. If your crawl space hasn't been inspected in over a year, or if you've recently experienced flooding or severe weather, it's advisable to have professionals assess the space even without obvious symptoms.

Most crawl space cleaning projects take between one and three days to complete, depending on several factors. Simple debris removal in a small, relatively clean space might be finished in a single day. 

More involved projects that include mold remediation, water damage repair, or pest control require two to three days. For large crawl spaces or those with extensive contamination, the timeline might extend to a week, particularly if additional services like encapsulation are included in the project scope.

You can remain in your home during basic crawl space cleaning. However, if the project involves mold remediation or pest extermination with chemical treatments, temporary relocation might be recommended, especially for household members with respiratory conditions or chemical sensitivities. 

Professional cleaning companies use containment procedures to minimize the spread of dust and contaminants into living spaces, but some disruption is inevitable. Discuss your specific situation with your service provider to determine the best approach for your family's needs.

The Seattle, WA homeowners’ guide to foundation, basement or crawlspace waterproofing / encapsulations
From average costs to expert advice, get all the answers you need to get your job done.
drainage system being installed in trench in yard
Apr 24, 2025
Apr 24, 2025
Rain got you down? There’s a fix for that. See how much it costs to install a drainage system for your yard and start budgeting with this guide.
professional repairing the foundation of a home
Apr 24, 2025
Apr 24, 2025
Budget for foundation repair costs based on factors such as the extent of damage, house size, materials, labor, problem type, and more.
clean crawlspace with insulation and wood beams under house
Apr 24, 2025
Apr 24, 2025
Budget for crawl space repair costs based on factors such as square footage, repair type, accessibility, cleaning, maintenance, labor, and more.
Empty basement with new concrete floor and white walls
Apr 21, 2025
Apr 21, 2025
If you’re planning to install a new foundation, check out budgeting and cost factors to consider.
raising the foundation of a home with a house lift
Apr 21, 2025
Apr 21, 2025
Learn how much it costs to raise a house. Explore how factors like the house size, structure, age, landscaping, and labor rates affect the price.
A man digging out a french drain
Mar 31, 2025
Mar 31, 2025
Budget for French drain costs based on factors including square footage, accessibility, labor, location, landscape repairs, and more.
Share project details to get started.