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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.

yH5BAEAAAAALAAAAAABAAEAAAIBRAA7 Seattle
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

Quinten was awesome. We weren't home when he showed up. I though we would have to reschedule but Quinten waited and was very pleasant about our delay. He made sure everything was working and explained the system to us. Thank you Quinten for coming out today and sorry again that we were late. Will recommend always to friends and Family.
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
Inspector Elijah was on time when he said he was going to be there was very prompt and personable. I feel like did a very thorough inspection of my crawlspace.
Quenton came to service crawl space sump. He did a thorough inspection of the whole space. Cleaned and serviced sump that was full of clay. Found issues and gave recommendations with pros and cons. He didn't push any unneccessary things. Took pictures of all issues and work and thoroughly explained everything. Installed a new dehumifier and removed old one and hauled away. Would recomnend this guy to anyone. I hope this guy is an example of how the business is run. Excellent job, very happy.
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 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!
TerraFirma made a major error when fixing the foundation for the overhang of our Enumclaw Plateau Historical Society museum. The posts were not properly spaced, giving the front of the building an uneven appearance. When the error was pointed out to them, they admitted it, and apologized. They paid the repair costs without argument. According to a businessman on our board, this is an unusual occurrence. I want to give them kudos for their management acting with integrity.
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, was a real professional. He explained everything so that even a 15yr old would understand.
I'd hire him in a minute.
Initial inspection and determination person was a very good listener and made good suggestions. The work was performed by an excellent technician with good experience. He explained the process and gave helpful advice. Great value for the money.
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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 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.
Wonderful people from start to finish. Morgan, who surveyed the job, Tammi in the office and the guys who did the work were ALL TOP SHELF!!!
Bailey was timely and thorough in his assessment, estimate, and reporting on my inquiry about a foundation crack. Although I decided not to have any work done at this time I was pleased with their service.
My sump pump service by Quinten was fantastic! He was very thorough, went above and beyond and took all my concerns seriously. Thank you so much!
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
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
Didn't end up choosing TerraFirma for the work we are doing but they were very professional and helpful through the whole process, especially our rep, Bailey. Recommend including them in the bids you get if you need foundation work.
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.
TerraFirma made a major error when fixing the foundation for the overhang of our Enumclaw Plateau Historical Society museum. The posts were not properly spaced, giving the front of the building an uneven appearance. When the error was pointed out to them, they admitted it, and apologized. They paid the repair costs without argument. According to a businessman on our board, this is an unusual occurrence. I want to give them kudos for their management acting with integrity.
Bailey, was a real professional. He explained everything so that even a 15yr old would understand.
I'd hire him in a minute.
yH5BAEAAAAALAAAAAABAAEAAAIBRAA7 Seattle

Schedule your free
Foundation Evaluation

Schedule your free
Foundation Evaluation