TerraFirma Foundation Systems

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18 Years In Business

Company Details

  • Verified Licenses


932 Industry Dr, Suite 200
Seattle, WA 98188


  • Mon: 8:00 AM - 5:00 PM
  • Tue: 8:00 AM - 5:00 PM
  • Wed: 8:00 AM - 5:00 PM
  • Thu: 8:00 AM - 5:00 PM
  • Fri: 8:00 AM - 5:00 PM
  • Sat: Closed
  • Sun: Closed
View All Details & Credentials


Service Details

  • Residential Work

Areas of Expertise

  • Foundation Stabilization & Repair
  • Foundation, Basement, & Crawl Space - Waterproofing
  • Crawl Space Encapsulation
  • Earthquake Retrofitting
  • PolyLeveling / Concrete Leveling
View All Offerings and Cities Served

Cost Information

  • Free Estimates
  • Credit Cards Accepted


58 Verified Reviews
  • 5
  • 4
  • 3
  • 2
  • 1

Highly rated for

  • Quality
  • Customer Service
Showing 1-10 of 58 results
4.5 Laura S. Portland, OR

The warranty won me over!

5.0 Pam W. Saint Helens, OR

Very efficient, thorough and took the time to show me tons of pictures of the underside of my house. Great explanations of why they choose to do certain things.

2.0 Nikki B. Portland, OR

These guys will promise you anything to get you to sign on the dotted line. They say they can level a sidewalk with their filler. I found out the hard way that this is not true. They worked for days filling underneath my sidewalk with God knows what and the sidewalk never budged. Doh on me. They are very expensive, especially when all they ended up doing was grinding the sidewalk down where it was higher. I tell everyone who is thinking of using these guys to level anything to beware.

5.0 Joseph C. Tacoma, WA

A wait to get them scheduled but we'll worth it

5.0 Stephany L. Beaverton, OR

Don from the Tigard TerraFirma was informative, professional, experienced and thorough.

Response from Company:

Thank you! We will pass this on to Don as well!

4.5 Bill L. Renton, WA

$20k for a crawl space encapsulation with a three-pump sump system is a lot of money. Too much? I am not sure of the four companies that came out, only TerraFirma gave a quote.

4.0 Dale B. Yelm, WA


5.0 Alison N. Tacoma, WA

Very timely and reliable. Upfront about timelines and good follow through with details and dates. Recommended for large water proofing job.

Response from Company:

Thank you for taking the time to write us a review, Alison! We are so happy to hear that you had a great experience with our team.

5.0 David H. Olympia, WA

Response from Company:

Thank you for the 5-Star rating, David!

5.0 Del D. Eugene, OR

On time, courteous skilled crew. Good follow up before job started. Would recommend to all others based on my experience!

Response from Company:

Thanks so much for your kind review, Del! We are so happy to hear you had such a great experience with us! We appreciate you and your business.


TerraFirma Foundation Systems
On the Job

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