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Foundation Contractors in Seattle

Leaking in basements and crawl spaces in Seattle and Renton, WA

One of the primary concerns associated with rain in Seattle and
Renton is water leaking into homes. Rainwater can seep through
roofs, windows, and foundations, leading to leaks, moisture damage,
and mold growth if not properly addressed. Homes with older or
poorly maintained drainage systems may be particularly susceptible
to leaks during heavy rainfall.

Foundation contractors in Seattle are ready to assist you. Here are the top services we provide to keep your home structurally sound.

TerraFirma protects homes from damp, wet basements and foundations around Seattle
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TerraFirma
Seattle Office

10111 S Tacoma Way d4,
Tacoma, WA 98499

Hours: Monday – Friday, 8am-5pm

Choose TerraFirma for Foundation Repairs Near Me in Seattle

If you want your home to stand strong against Seattle’s relentless rain, TerraFirma is the way to go. Our team understands the unique challenges of the area, uses effective methods, and utilizes only high-quality materials for each job. Reach out to our foundation contractors in Seattle to keep your home safe and dry.

Basement Crack Repair in Seattle & Bellevue

Cracks in basement floors are more common than you might expect in Seattle! The size and location of cracks can tell us a little more about what’s going on under your home.

Hairline Cracks in Basement are usually not a sign of structural weakness.

Cracks in Basement Leaking Water can be solved by our sump pump and drainage system solutions.

Heaving Crack in Basement suggests that the soil beneath the basement floor is expanding. When the soil becomes wet, it creates enough pressure to lift and crack a concrete slab floor.

When to Worry about Cracks in Basement – Cracks wider than 1/8″ should be sealed. Check out these 6 common basement crack problems.

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Foundation Repair Contractors Near Me in Seattle

EverBrace & PowerBrace Wall Stabilization Systems reinforce and strengthen your Seattle home against further shifting and settlement

Helical Piles or Helical Piers are the top choice for stailizing Seattle homes with foundations shifting on wet, unstable soil conditions.

Whereas Push Pier Systems push supports all the way to the bedrock under your Seattle home.

Check out all our foundation piering systems here.



Foundation Repair Contractors Near Me in Seattle

EverBrace & PowerBrace Wall Stabilization Systems reinforce and strengthen your Seattle home against further shifting and settlement

Helical Piles or Helical Piers are the top choice for stailizing Seattle homes with foundations shifting on wet, unstable soil conditions.

Whereas Push Pier Systems push supports all the way to the bedrock under your Seattle home.

foundationrepair everbrace Seattle
TerraFirma is not just your Residential Foundation Repair Expert…

We’re Seattle’s Top Commercial Foundation Contractor

for Commercial, Retail, Warehouses, Schools, Government Offices, and More
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helical piles
Stabilize sinking, settling commercial structures with Supportworks helical piers.
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Micropiles & push piers
Expert micropile installation solutions for stability in tight-access and hard soil situations.
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Commercial concrete
lifting & leveling
TerraFirma concrete leveling utilizes high-strength polymers to fill voids under concrete.

Award Winning
Results Begin Here.

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Award Winning
Results Begin Here.

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bbb Terrafirma Award 2 Seattle
HA elite Terrafirma Awar Banner 2 Seattle

SEATTLE Homeowners Frequently Asked Questions

What types of cracks in my foundation or basement should I be concerned with?

What’s the cost of foundation repair in Seattle and Bellevue?

How to fix a leaking basement floor?

How to repair a sagging crawl space in Seattle and Bellevue?

How to stop water from leaking through my basement windows?

What type of pier to use for foundation repair in Seattle?

Are you noticing damp drywall and carpet in your basement?

How to repair damaged concrete in Seattle?

What’s the best way to repair concrete?

How to fix moisture issues in your crawl space?

How to protect my basement from leaking and flooding in Seattle?

What are the soil conditions in Seattle and Bellevue?

SCHEDULE A FREE
INSPECTION
IN Seattle

We offer free inspections to homeowners throughout King County. Contact us today and make sure your
home is in top shape!

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SEE WHAT YOUR NEIGHBORS
HAVE TO SAY ABOUT US!

At TerraFirma we take pride in our work! We are trusted and referred by homeowners since 2005, to provide solutions for home foundations, basement and crawl space moisture, concrete leveling, and earthquake retrofitting.

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Seattle
Homeowner
REVIEWS

Don’t take our word for it – see what our clients have to say.
Throughout the greater Seattle area, including Renton, Bellevue, Kirkland, Auburn, and beyond, our work speaks for itself

Had an awesome experience from start to finish. I initially worked with Tulane Seville whom helped me tremendously. Very friendly, professional, thorough & kind. He made the whole process go smoothly.

Also Robert marciniak who did the foundation job was great! Hard working, pleasant & explained all the steps to my tenants & I. He even completed the job a day earlier than anticipated. Overall I’m so happy with Terra Firma & their employees. Thank you.
Fast work, was able to get us scheduled fairly quickly before any more damage could happen to the foundation (was sort of sinking or settling). The clean up of the dust could have been better, and I spoke with them about it. I am very happy that my kitchen cupboards are now back up to the ceiling, the 1/4" gap is gone. It took months for things to settle in, but am very glad I went with Terrafirma.
Great work. I had huge foundation issues on a large waterfront project. Terra firma waterproofed my basement and lifted the house on hydolic piers to level it out. They saved my project. Seth was a fantastic project manager and Oscar and Jorge completed the job extremely well. 10/10 would recommend for any foundation issues.
100% will recommend this company. Friendly, respectful, professional employees. Rare in these days and times.
My husband Scott and I were very happy with the results from our driveway repair by TerraFirma. They were extremely great to work with and did a phenomenal job. They even fit us in quickly and that was super awesome. Kudos to Robert and Skye for their amazing work on our property. I'd highly recommend TerraFirma for your driveway repair. Go hire TerraFirma for your driveway repair and you won't regret it.
My wife and I have an old house that needs work done in the foundation. So I called Terra Firma, and they sent Seth to look things over and help us come up with a plan. We enjoyed his visit and were very comfortable having him in our house. He gave us some great options, and he followed through on his word with a prompt quote and follow-up call. Although the time isn’t right for us, we definitely feel that we can trust them to do good work. Thank you Terra Firma!
I could not be more impressed with how informative, respectful, and honest Bailey was with my parents. He took a very stressful and emotional time, and eased their fears and took the time to really explain and educate them on the best option for their property. I am so grateful!
Seth, Bree and Angel were fantastic to work with! Thank you Terra Firma for helping stabilize our cabin. Professional, on-time and kept us informed of all the steps that they were taking and why. Up front pricing, no hidden costs and a job well done! Very Satisfied customers! Highly Recommended.
Reasonable rate, young and skilled techs. It is almost like a magic to see the gaps dissapearing.
Robert was at our project house on 2/20/25 and it was a pleasure to talk and interact with him. I would like to commend him for his work ethic and dedication to your company. Highly recommend TerraFirma!!
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TERRAFIRMA IN SEATTLE

With over 20 years of experience fixing foundations, basements, and crawlspaces, we know Seattle.
Maybe a little too well. Read on to find helpful homeowner tips, case studies, and before & after galleries
from our worlk in Bellevue, Redmond, Renton, and beyond.

Need Top Rated
Foundation Experts
in Washington?

Our clients don’t just recommend us—they rave! From Tacoma to Seattle, Olympia to Puyallup, and all across Washington state, our trusted experts consistently provide top-rated, reliable foundation solutions. See for yourself why we’re the preferred choice.

Bailey was the best! So knowledgeable and helpful! Also, very understanding & caring! So good at what he does!
Had an awesome experience from start to finish. I initially worked with Tulane Seville whom helped me tremendously. Very friendly, professional, thorough & kind. He made the whole process go smoothly.

Also Robert marciniak who did the foundation job was great! Hard working, pleasant & explained all the steps to my tenants & I. He even completed the job a day earlier than anticipated. Overall I’m so happy with Terra Firma & their employees. Thank you.
Although TerraFirma wasn’t able to assist with my specific concern, Bailey was extremely professional and thorough. I would definitely recommend having them evaluate your next project.
I had a very positive and honest conversation with Bailey regarding leveling my front walkway. He performed a thorough inspection and explained the outcome of the inspection and the method of treatment. Ask for Bailey!
So pleased with the total experience. We were provided with expert analysis of how to achieve stabilization of a concrete slab. Coordination between sales, planning and production was excellent. Technician was very proficient and friendly.
Bailey demonstrated exceptional attention to detail and expertise when inspecting the house foundation, ensuring everything was up to code and structurally sound. He addressed the issues I was concerned about and was very honest on his findings.
They did great work!!
I could not be more impressed with how informative, respectful, and honest Bailey was with my parents. He took a very stressful and emotional time, and eased their fears and took the time to really explain and educate them on the best option for their property. I am so grateful!
Bailey Mercer-system design specialist made a visit to my home to provide an estimate for foundation work. He was professional, well-mannered and easy to talk to. Assessment was thorough with all my questions being clearly answered. Great experience overall!
Robert was at our project house on 2/20/25 and it was a pleasure to talk and interact with him. I would like to commend him for his work ethic and dedication to your company. Highly recommend TerraFirma!!
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Schedule your free
Foundation Evaluation

Schedule your free
Foundation Evaluation