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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.

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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

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.
Five stars aren't enough. We had a sizable project on an old house in tight quarters with neighbors who were concerned. We knew going into our project that there was going to be a lot of guesswork in the planning, and that whomever we hired for the project would have to make changes on the fly. The planning team was very clear about what they knew, and what they were inferring based on their experience and what they might discover when they started excavating.

They presented us with us a few different proposals with breakdowns of the cost and a list of the pros and cons of every plan, answering all of our questions before we finalized our choice.

The whole team at Terra Firma was incredible throughout; clear, consistent communication about the progress on the project and how it evolved as the plans encountered reality. It was a job well done with consistent care and extra effort. Whether it was the on-site team or the office staff supporting the project, everyone was a genuine pleasure to work with.
While I did not choose TerraFirma for my project, it was still a very positive experience. I would definitely call them again if something came up in the future. From scheduling through the bidding process, they were responsive and organized - seemed to have all their ducks in a row. Bailey came out to inspect and put together a bid - he was on time, incredibly organized, thorough, knowledgeable, friendly, and communicative.
We worked with Seth Cunningham from Terra Firma in Tacoma and he was a consummate professional throughout the entire process.
We recently decided to sell the home and Seth offered to speak with the buyers about the work they did and the transferable warranty. This gave the buyers the confidence to move forward with the purchase. Many thanks Seth!
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.
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.
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
Great expedience, very knowledgeable and helpful .
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!
I reached out to TerraFirma for my foundation work. Although we ended up going in a different direction, I was very impressed with Bailey and his professionalism throughout the process. He was prompt, courteous, and took the time to thoroughly explain the issues and possible solutions. His knowledge and honesty gave me confidence in his expertise, and I would definitely consider him for future projects or recommend him to others looking for foundation services.
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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.

Five stars aren't enough. We had a sizable project on an old house in tight quarters with neighbors who were concerned. We knew going into our project that there was going to be a lot of guesswork in the planning, and that whomever we hired for the project would have to make changes on the fly. The planning team was very clear about what they knew, and what they were inferring based on their experience and what they might discover when they started excavating.

They presented us with us a few different proposals with breakdowns of the cost and a list of the pros and cons of every plan, answering all of our questions before we finalized our choice.

The whole team at Terra Firma was incredible throughout; clear, consistent communication about the progress on the project and how it evolved as the plans encountered reality. It was a job well done with consistent care and extra effort. Whether it was the on-site team or the office staff supporting the project, everyone was a genuine pleasure to work with.
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.
Absolutely Great Crew-Jorge,Juan and Manuel! Very Professional. Answer all my questions as they worked my Project. Very well organized. Used all the proper safety gear to remain healthy and virtually encapsulated with plastic the interior of my home to contain the dirt/debris tracked in from outside/under the house. They helped set up the electronic gizmos to my WiFi so I can monitor the system they installed. Very happy with the results.
Sam was able to provide an excellent inspection and honest report of my crawlspace waterproofing needs. Didn’t feel rushed or pressured. Was able to educate me to better understand the issues and risks. Thank you so much Sam
Bailey came out and did an inspection and an estimate. He was thorough, respectful, and honest and represented the integrity of this company well.
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
Estimator Derek was very friendly and helpful. Had a much better experience with him than I did with Groundworks. Quote was better too and took about a week to get on the calendar. Was able to get on the schedule fairly quick and they even called with a same day cancellation the Friday before we were scheduled.
Work that was done was okay, they were able to lift what we wanted on the main driveway and did their best in front of the steps. Unfortunately they used a jack, which I wasn't expecting, and ended up cracking the slab in front of the steps. It's in the contract that they're not responsible for this so nothing was done to mitigate it. Also a slab next to the large one lifted developed a large crack after they applied the stabilizing foam to the lifted slab.
Other issue is that they said it wouldn't be an issue to have the truck down our driveway as they have more than enough hose to work with. Unfortunately they backed the truck right into our magnolia tree and when they were pulling away it ripped a large chunk of branches out.
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.
I recently requested an evaluation from Terra Firma for a vacation property, far from many resources, and where many companies will not work. Bailey came out, on time, prepared to do a full examination of the issue and give me a quote with options before even leaving the property. I was greatly surprised by the response. Bailey was extremely professional but also personal, and also educational. I wasn't even sure if we had an issue that needed attention in the near future. He helped me to understand the nature of the issues and the best steps forward to having a safer and better protected home. Terra Firma was also extremely patient as I did more research and confirmed the findings. We now have a plan for how to move forward. I would highly recommend Terra Firma both for their work, but also for how they care for their employees. They are not just looking for a job and money, but are truly looking to partner to make life better for all involved.
I am very pleased with the completed work raising the back door porch entry, they were on time, very polite and professional, had all the tools and equipment to do the job.
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Schedule your free
Foundation Evaluation

Schedule your free
Foundation Evaluation