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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.
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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.

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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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
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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

Charlie came for our annual checkup on the sump pump. He was prompt, friendly, and helped to make sure everything was working well. Would recommend these ongoing services.
From the first very fair estimate given to the completion of the major house leveling project I am totally impressed. There communication was unbelievable. There crews answered my questions throughout the process and left the area better than it was when they started. They completely blew me away. If you want a good job at a more than fair price there it. Bree the project manger kept me informed and she did all the permits. Incredible!!!’
?eai=Aa1T5MCayIS8975gRwI l7rjYlGAFuhIzY9OFHAA HBlEVUMnCxf0zL02xHuw77ov76dUH37EH9lWg&psid=2047759921967898&height=56&width=56&ext=1792337869&hash=AftQvSzEpU tTtfQdholCA5G Seattle
Jared O.recommends
Had them look under a house we had just purchased. Not only was he honest, but he told me about separate problems that the inspector missed! I will definitely use them when the need appears. Also, I have worked with them in the field. They do a great job, and work really hard!
Great job Thank all you guys TerraFirma👏 keep going
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 used Terrafirma for foundation support repair. I found the staff and work crew very honest and extremely thorough! Was a little outside my budget, but I was so happy that I chose them! Satisfaction in every area is so worth it!! Will choose them over and over and refer! AE
Great job!
?eai=Aa3Dzc4o51Vshe1cBgQa4Tjx70to3okQpHtlymL8VaPHzGlWZARIn0OQjXgOQsLcA4 9nmtwlRMw5A&psid=1601325259970825&height=56&width=56&ext=1792337870&hash=AftGy2eyFTPl6LuIExSJN jA Seattle
Ilona M.recommends
Gus and apprentice came out to my house. Were super curious, after knocking and explaining the situation they were done in less than 15 minutes fixing my leaking sump pump. Super work and the job was done right. Big props to this team doing it right. Thank you �
Seth came out to evaluate my foundation and gave me one of the most thorough and honest assessments I've experienced from a contractor. Professional, communicative, and zero pressure — he clearly takes pride in his work. I didn't move forward with the project through Terra Firma, but that has nothing to do with Seth or the quality of his visit. Highly recommend requesting him specifically. 5 stars.
If there were 10 stars to give the folks from TerraFirma, it still wouldn’t be enough. From the person who came to my home and gave me a very professional bid to the person who scheduled us and then to the poor young men that had to come back multiple times to finally get the job done-there couldn’t have been a more dedicated group of people. The job we had came with several unexpected glitches that were unpredictable. They did a bunch of extra work to take care of the problems and when they couldn’t do it and I needed another company to come cut my concrete, they set that all up very conveniently for me and then came out to finish the job. All for the amount of the original bid! They will do the job, no matter how difficult and they will leave you smiling.
They did great work!!
I had two estimates. TerraFirma was much cheaper but more than that they moved fast, were clean, professional. The inspector gave them high marks and I have a house that is earthquake secure to magnitude 8 give ir take.

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.

Seth came out to evaluate my foundation and gave me one of the most thorough and honest assessments I've experienced from a contractor. Professional, communicative, and zero pressure — he clearly takes pride in his work. I didn't move forward with the project through Terra Firma, but that has nothing to do with Seth or the quality of his visit. Highly recommend requesting him specifically. 5 stars.
They did great work!!
If there were 10 stars to give the folks from TerraFirma, it still wouldn’t be enough. From the person who came to my home and gave me a very professional bid to the person who scheduled us and then to the poor young men that had to come back multiple times to finally get the job done-there couldn’t have been a more dedicated group of people. The job we had came with several unexpected glitches that were unpredictable. They did a bunch of extra work to take care of the problems and when they couldn’t do it and I needed another company to come cut my concrete, they set that all up very conveniently for me and then came out to finish the job. All for the amount of the original bid! They will do the job, no matter how difficult and they will leave you smiling.
Great job Thank all you guys TerraFirma👏 keep going
Great job!
?eai=Aa1T5MCayIS8975gRwI l7rjYlGAFuhIzY9OFHAA HBlEVUMnCxf0zL02xHuw77ov76dUH37EH9lWg&psid=2047759921967898&height=56&width=56&ext=1792337869&hash=AftQvSzEpU tTtfQdholCA5G Seattle
Jared O.recommends
Had them look under a house we had just purchased. Not only was he honest, but he told me about separate problems that the inspector missed! I will definitely use them when the need appears. Also, I have worked with them in the field. They do a great job, and work really hard!
?eai=Aa3Dzc4o51Vshe1cBgQa4Tjx70to3okQpHtlymL8VaPHzGlWZARIn0OQjXgOQsLcA4 9nmtwlRMw5A&psid=1601325259970825&height=56&width=56&ext=1792337870&hash=AftGy2eyFTPl6LuIExSJN jA Seattle
Ilona M.recommends
Gus and apprentice came out to my house. Were super curious, after knocking and explaining the situation they were done in less than 15 minutes fixing my leaking sump pump. Super work and the job was done right. Big props to this team doing it right. Thank you �
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 used Terrafirma for foundation support repair. I found the staff and work crew very honest and extremely thorough! Was a little outside my budget, but I was so happy that I chose them! Satisfaction in every area is so worth it!! Will choose them over and over and refer! AE
From the first very fair estimate given to the completion of the major house leveling project I am totally impressed. There communication was unbelievable. There crews answered my questions throughout the process and left the area better than it was when they started. They completely blew me away. If you want a good job at a more than fair price there it. Bree the project manger kept me informed and she did all the permits. Incredible!!!’
Charlie came for our annual checkup on the sump pump. He was prompt, friendly, and helped to make sure everything was working well. Would recommend these ongoing services.
I had two estimates. TerraFirma was much cheaper but more than that they moved fast, were clean, professional. The inspector gave them high marks and I have a house that is earthquake secure to magnitude 8 give ir take.

Schedule your free
Foundation Evaluation

Schedule your free
Foundation Evaluation