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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.

tf foundation cracks basement floors Seattle
foundationrepair everbrace Seattle
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
tf commercial cracked driveways Seattle
helical piles
Stabilize sinking, settling commercial structures with Supportworks helical piers.
tf commercial sunken driveways garage Seattle
Micropiles & push piers
Expert micropile installation solutions for stability in tight-access and hard soil situations.
tf commercial uneven porche Seattle
Commercial concrete
lifting & leveling
TerraFirma concrete leveling utilizes high-strength polymers to fill voids under concrete.

Award Winning
Results Begin Here.

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

Award Winning
Results Begin Here.

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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bbb Terrafirma Award 2 Seattle
HA elite Terrafirma Awar Banner 2 Seattle
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facebook logo Seattle
tf n logo Seattle
bbb Terrafirma Award 2 Seattle
HA elite Terrafirma Awar Banner 2 Seattle
yelp logo Seattle

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

I bought a house with a TF sump pump system installed and had no idea how to use it. A small issue came up, and Jeff came out immediately, fixed the problem and gave me the tutorial I needed, and then some. Professional, friendly, went above and beyond!
Seth came out and did a very thorough evaluation. Recommended how to proceed going forward and was extremely professional. Really looking forward to working with them.
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!
The crew at Terra Firma were professional, smart and communicated very well for my project. They worked hard all day everyday in completing my project. My crawl space needed a French drain and sump pump set up as well as removal of all insulation, mold remediation and new vapor barrier. It should have been a simple job by all accounts. After they started to dig, it became clear that this was not gong to be ordinary. They ran into a layer of very hard clay that required much more work than anyone thought. They brought in every power toll they could fit into the crawl space to get it done. at the end of the day everyday no matter how tired they were, they cleaned up the work space and informed me of the status. They covered and protected my floors with no accidents as my crawl space is accessed through the interior of my house. Colin the Forman on the job worked extremely hard with no quit attitude, even when he was unexpectedly short handed one day. All other crew members were also very hard working, friendly and professional. I would recommend Terra Firma and would have them back if I need anymore work done. Thank you all at Terra Firma.
Eric evaluated the problem and inspired our trust by realistically describing the possible outcomes of various solutions. No hard sell involved. Highly recommend!
I cannot express enough how grateful I am for the exceptional service provided by Seth and the team at TerraFirma Foundation Systems. We were facing a daunting challenge with standing water underneath our house, and Seth guided us through the entire process with professionalism, expertise, and genuine kindness. From the moment Seth arrived, it was evident that he was not only knowledgeable but also deeply passionate about resolving our issue. His expertise in dealing with water problems beneath homes was evident, and he took the time to thoroughly assess our situation (and got plenty dirty doing it) before presenting us with a comprehensive solution. He patiently answered all of our questions, alleviating any concerns we had along the way. It was clear that he genuinely cared about finding the best possible outcome for us. Consider this company, it'll be worth your time!
I had an excellent experience with Seth from TerraFirma during the field review of my home. He was punctual, professional, and extremely knowledgeable about every aspect of the house. Seth took the time to explain what he was seeing, answered all of my questions clearly, and made sure I fully understood the condition and next steps. It’s rare to find someone who combines expertise with genuine care and attention to detail, but Seth absolutely delivered. His professionalism and confidence gave me real peace of mind. I highly recommend Seth and TerraFirma to anyone needing a thorough and trustworthy home field review.
100% will recommend this company. Friendly, respectful, professional employees. Rare in these days and times.
Bailey came out to do an inspection of our foundation to let us know what shape it was in and what kind of work might need to be done. He was thorough and honest about the condition of our foundation so we could make informed decisions about next steps with our property.
Excellent company to work with; we were out of state during our project and the company reps were excellent in communicating with us. Would highly recommend them!
Professional service - thank you
Being my first home, I went into it knowing my foundation would need extra care. The TerraFirma team was amazing and very personable. I mean everyone to included, customer service when you call for an appointment, to the initial inspection, and Shea calling to make the appointment. I had Collin as the lead for my home and, he made it happen. Couldn't have had a better group be so professional and kind. Makes all the difference. Glad I was able to find these guys. Highly recommend. 🎉🎉🎉

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.

Being my first home, I went into it knowing my foundation would need extra care. The TerraFirma team was amazing and very personable. I mean everyone to included, customer service when you call for an appointment, to the initial inspection, and Shea calling to make the appointment. I had Collin as the lead for my home and, he made it happen. Couldn't have had a better group be so professional and kind. Makes all the difference. Glad I was able to find these guys. Highly recommend. 🎉🎉🎉
I cannot express enough how grateful I am for the exceptional service provided by Seth and the team at TerraFirma Foundation Systems. We were facing a daunting challenge with standing water underneath our house, and Seth guided us through the entire process with professionalism, expertise, and genuine kindness. From the moment Seth arrived, it was evident that he was not only knowledgeable but also deeply passionate about resolving our issue. His expertise in dealing with water problems beneath homes was evident, and he took the time to thoroughly assess our situation (and got plenty dirty doing it) before presenting us with a comprehensive solution. He patiently answered all of our questions, alleviating any concerns we had along the way. It was clear that he genuinely cared about finding the best possible outcome for us. Consider this company, it'll be worth your time!
Professional service - thank you
The crew at Terra Firma were professional, smart and communicated very well for my project. They worked hard all day everyday in completing my project. My crawl space needed a French drain and sump pump set up as well as removal of all insulation, mold remediation and new vapor barrier. It should have been a simple job by all accounts. After they started to dig, it became clear that this was not gong to be ordinary. They ran into a layer of very hard clay that required much more work than anyone thought. They brought in every power toll they could fit into the crawl space to get it done. at the end of the day everyday no matter how tired they were, they cleaned up the work space and informed me of the status. They covered and protected my floors with no accidents as my crawl space is accessed through the interior of my house. Colin the Forman on the job worked extremely hard with no quit attitude, even when he was unexpectedly short handed one day. All other crew members were also very hard working, friendly and professional. I would recommend Terra Firma and would have them back if I need anymore work done. Thank you all at Terra Firma.
Excellent company to work with; we were out of state during our project and the company reps were excellent in communicating with us. Would highly recommend them!
I had an excellent experience with Seth from TerraFirma during the field review of my home. He was punctual, professional, and extremely knowledgeable about every aspect of the house. Seth took the time to explain what he was seeing, answered all of my questions clearly, and made sure I fully understood the condition and next steps. It’s rare to find someone who combines expertise with genuine care and attention to detail, but Seth absolutely delivered. His professionalism and confidence gave me real peace of mind. I highly recommend Seth and TerraFirma to anyone needing a thorough and trustworthy home field review.
Seth came out and did a very thorough evaluation. Recommended how to proceed going forward and was extremely professional. Really looking forward to working with them.
Bailey came out to do an inspection of our foundation to let us know what shape it was in and what kind of work might need to be done. He was thorough and honest about the condition of our foundation so we could make informed decisions about next steps with our property.
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!
100% will recommend this company. Friendly, respectful, professional employees. Rare in these days and times.
I bought a house with a TF sump pump system installed and had no idea how to use it. A small issue came up, and Jeff came out immediately, fixed the problem and gave me the tutorial I needed, and then some. Professional, friendly, went above and beyond!
Eric evaluated the problem and inspired our trust by realistically describing the possible outcomes of various solutions. No hard sell involved. Highly recommend!

Schedule your free
Foundation Evaluation

Schedule your free
Foundation Evaluation