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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.

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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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

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!
Had an estimate done by Tanner. He made sure all our questions were answered and took lots of pictures to show us the issues!
Junior and the crew that worked on our house were great. They were on time, always courteous, cleaned up after themselves, communicated well, and finished on time. We would highly recommend them.
Noah was extremely thorough and explained his findings clearly with optional choices of services that we needed with the pricing. He was friendly, courteous and easy to talk to. We would highly recommend Terra Firma. Noah is a very valuable representative of the company.
Seth came out to bid a project, replacing old wooden posts with steel. He was on time and very knowledgeable. He took his time making sure not to miss any details, which I really appreciated. Can't wait to get the work completed!
Noah came out to look at some floor sagging and to check for other foundation issues. He was great to chat with, thorough in his inspection, and did a nice job walking through his findings and the options. While we did not chose to move forward with any of the plans at this time, the company was prompt and Noah was wonderful, so recommending them as a company to reach out to if you are collecting quotes.
We had some basement flooding in our house and after learning the cause, we started the work of getting quotes and inspections from Foundation specialists. When we called TerraFirma, Bailey was able to make time for our inspection within the week. From the jump, Bailey was very communicative, and set expectations upfront. He asked what was going on, looked at some suspected intrusion points and then let me know he'd carry on with the inspection and would let me know when he was ready for me. No awkward standing around or wondering how long it would take. Bailey was very thorough with his inspection and had an impressive presentation once he'd made a diagnosis. He told me his ideas and then asked me mine and we both felt good about the plan walking away from it. Ultimately our timeline didn't work out and we personally had to go a different direction, but if it did I'm confident we'd be in good hands with Bailey and TerraFirma!
Seth has made this process so streamlined and time efficient. I was concerned about my foundation issue, however he was able to assess the issue and present a viable solution with ease. He explained what had occurred and how to fix/ prevent such issues in the future in a way that left me informed and empowered to make informed decisions about going forward. He and his team has been prompt with communications and even sent photo updates of the work being complete, as I was out of town at the time. I really appreciated Seth going out of his way to make this the best experience possible, taking pride in his work and putting in the extra effort.
Called TerraFirma to take a look at the concrete steps that have been settling for years. Bailey Mercer is very professional, knowledgeable, and easy to work with. He answered all our questions, and addressed our concerns. At the end, he presented us with 3 different solutions. There was no pressure to pick one, or pick the most expensive one, or pick one within the hour or the deal is gone. We had the weekend to think about it. Bailey did a follow up call as promised, and answered even more questions - all to our satisfaction. I will update when work begins and at its conclusion. Bailey should get a surf and turf dinner, not just a lunch!
Steve and his crew came to install a french drain and sump in our basement, and fill a void in our foundation with poly-level. The work team plus Richard, our estimator, were all super helpful and I guess at this point, time will tell if the issue was fixed. With the quality of service, we have no reason to assume otherwise! If we need similar help in the future, Terra Firma will have our business.
Our crawlspace had been flooding for who knows how long We attempted to get bids for multiple places including InjecTech (never called us back or returned our call) and Perma-Dry (never called us back or returned our call). Finally we found out about TerraFirma and an estimator came out with the week. He was very friendly, informative, and was able to provide a quote right on the spot! There were many options to chose from and the estimator explained all of them in great detail in a way that was easy to understand. We opted for the, what I like to call, "Buy Once, Cry Once" package; this included a thicker vapor barrier, three pump sump, full crawlsapce encapsulation, etc. It took about 3 full days for the work to be completed and the crew did an AMAZING job!!! I wish I had taken before and after pictures because the transformation is unreal. We've since had some very heavy rains where before the fix it would've surely been flooded, but I've checked multiple times and is dry as can be. I'm so happy to have this taken care of and with multiple financing options available we were able to find a plan that worked for us. One last thing to note, we did have to find a second contractor to install the electrical outlets for the pumps, so that was an added cost; but we were informed of that up front so it wasn't a surprise. 10/10 highly recommend TerraFirma!
We got an estimate on a leveling project from Noah last week. He was very competent, thorough, and knowledgeable. We enjoyed meeting and working with this personable young man.

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.

Junior and the crew that worked on our house were great. They were on time, always courteous, cleaned up after themselves, communicated well, and finished on time. We would highly recommend them.
Noah came out to look at some floor sagging and to check for other foundation issues. He was great to chat with, thorough in his inspection, and did a nice job walking through his findings and the options. While we did not chose to move forward with any of the plans at this time, the company was prompt and Noah was wonderful, so recommending them as a company to reach out to if you are collecting quotes.
Seth came out to bid a project, replacing old wooden posts with steel. He was on time and very knowledgeable. He took his time making sure not to miss any details, which I really appreciated. Can't wait to get the work completed!
Called TerraFirma to take a look at the concrete steps that have been settling for years. Bailey Mercer is very professional, knowledgeable, and easy to work with. He answered all our questions, and addressed our concerns. At the end, he presented us with 3 different solutions. There was no pressure to pick one, or pick the most expensive one, or pick one within the hour or the deal is gone. We had the weekend to think about it. Bailey did a follow up call as promised, and answered even more questions - all to our satisfaction. I will update when work begins and at its conclusion. Bailey should get a surf and turf dinner, not just a lunch!
Noah was extremely thorough and explained his findings clearly with optional choices of services that we needed with the pricing. He was friendly, courteous and easy to talk to. We would highly recommend Terra Firma. Noah is a very valuable representative of the company.
We had some basement flooding in our house and after learning the cause, we started the work of getting quotes and inspections from Foundation specialists. When we called TerraFirma, Bailey was able to make time for our inspection within the week. From the jump, Bailey was very communicative, and set expectations upfront. He asked what was going on, looked at some suspected intrusion points and then let me know he'd carry on with the inspection and would let me know when he was ready for me. No awkward standing around or wondering how long it would take. Bailey was very thorough with his inspection and had an impressive presentation once he'd made a diagnosis. He told me his ideas and then asked me mine and we both felt good about the plan walking away from it. Ultimately our timeline didn't work out and we personally had to go a different direction, but if it did I'm confident we'd be in good hands with Bailey and TerraFirma!
Our crawlspace had been flooding for who knows how long We attempted to get bids for multiple places including InjecTech (never called us back or returned our call) and Perma-Dry (never called us back or returned our call). Finally we found out about TerraFirma and an estimator came out with the week. He was very friendly, informative, and was able to provide a quote right on the spot! There were many options to chose from and the estimator explained all of them in great detail in a way that was easy to understand. We opted for the, what I like to call, "Buy Once, Cry Once" package; this included a thicker vapor barrier, three pump sump, full crawlsapce encapsulation, etc. It took about 3 full days for the work to be completed and the crew did an AMAZING job!!! I wish I had taken before and after pictures because the transformation is unreal. We've since had some very heavy rains where before the fix it would've surely been flooded, but I've checked multiple times and is dry as can be. I'm so happy to have this taken care of and with multiple financing options available we were able to find a plan that worked for us. One last thing to note, we did have to find a second contractor to install the electrical outlets for the pumps, so that was an added cost; but we were informed of that up front so it wasn't a surprise. 10/10 highly recommend TerraFirma!
Had an estimate done by Tanner. He made sure all our questions were answered and took lots of pictures to show us the issues!
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 has made this process so streamlined and time efficient. I was concerned about my foundation issue, however he was able to assess the issue and present a viable solution with ease. He explained what had occurred and how to fix/ prevent such issues in the future in a way that left me informed and empowered to make informed decisions about going forward. He and his team has been prompt with communications and even sent photo updates of the work being complete, as I was out of town at the time. I really appreciated Seth going out of his way to make this the best experience possible, taking pride in his work and putting in the extra effort.
We got an estimate on a leveling project from Noah last week. He was very competent, thorough, and knowledgeable. We enjoyed meeting and working with this personable young man.
Steve and his crew came to install a french drain and sump in our basement, and fill a void in our foundation with poly-level. The work team plus Richard, our estimator, were all super helpful and I guess at this point, time will tell if the issue was fixed. With the quality of service, we have no reason to assume otherwise! If we need similar help in the future, Terra Firma will have our business.

Schedule your free
Foundation Evaluation

Schedule your free
Foundation Evaluation