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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.

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

TerraFirma Foundation Systems is excellent at basement waterproofing. Be sure to ask about all the available options so you can choose the one that’s right for you. The company is very capable, but it’s important to do your research before making a decision.

The crew—Antonio, Jessi, and Casey—worked extremely well together. Antonio is especially sharp; whenever I suggested an idea, he immediately understood what I meant and offered an even better solution on the spot.
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.
We were concerned that our foundation was uneven. Tulane came out, thoroughly inspected our home and confirmed we had uneven flooring/ foundation issues throughout our house and garage. He offered us a few different resolutions and was super informative about what to expect. We chose to proceed and address the issues. Bree reached out and was super helpful with scheduling and even accommodating us when we had to reschedule. Robert came out today, explained the process, then got started to work. He was super respectful of our property and worked so efficiently he was able to get the job completed in 1 day vs 2 days. Terrafirma was able to resolve all of our issues & was super easy to work with! Thank you again
Bailey, was a real professional. He explained everything so that even a 15yr old would understand.
I'd hire him in a minute.
Bailey was the best! So knowledgeable and helpful! Also, very understanding & caring! So good at what he does!
Seth, awesome job on lifting my garage floor… it’s been a few months now and everything is looking great. Would recommend Seth on any job site, his professionalism and expertise can’t be ignored… Thanks James
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!
Had a great experience with Derek Ryan…very knowledgeable, professional and explained everything to our satisfaction. He also provided follow up support, which was much appreciated!
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.
Bailey did a fantastic job inspecting my crawl space and designing a solution that fit my needs. I really appreciated his thorough evaluation, detailed explanations, and professionalism. I will keep TerraFirma in mind for future projects.

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.

We hired TerraFirma to fix our foundation. They inspected thoroughly, explained the plan, and completed the repairs professionally. The process was smooth, and we’re thrilled with the results. Highly recommend TerraFirma!
TerraFirma Foundation Systems is excellent at basement waterproofing. Be sure to ask about all the available options so you can choose the one that’s right for you. The company is very capable, but it’s important to do your research before making a decision.

The crew—Antonio, Jessi, and Casey—worked extremely well together. Antonio is especially sharp; whenever I suggested an idea, he immediately understood what I meant and offered an even better solution on the spot.
Bailey came out and did a thorough walk through, listened to my project plans, was very helpful and polite!
Seth came over and had a look at my foundation to give me a quote on some work. I was incredibly impressed by how thorough he was with his inspection of my property and the knowledge he had to help me assess the condition of my foundation. Would highly recommend
Very thorough and informative.
Seth, awesome job on lifting my garage floor… it’s been a few months now and everything is looking great. Would recommend Seth on any job site, his professionalism and expertise can’t be ignored… Thanks James
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.
Bailey did a fantastic job inspecting my crawl space and designing a solution that fit my needs. I really appreciated his thorough evaluation, detailed explanations, and professionalism. I will keep TerraFirma in mind for future projects.
Seth C. was really helpful this morning. It has been raining so much lately and he was able to walk me through all the issues my daylight basement and garage can have and how TerraFirma fixes them. Really appreciate you--/thanks so much Seth
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!

Schedule your free
Foundation Evaluation

Schedule your free
Foundation Evaluation