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Company Awards
Elite Service Professional Award
By receiving no homeowner complaints and having more than five five star ratings on our profile, TerraFirma was awarded the... [Read more]
Home Advisor Top Rated Company
TerraFirma earned the "Top Rated" award from Home Advisor, a home improvement website that millions of homeowners trust to help... [Read more]
Inc. Fastest-Growing Private Companies in America
TerraFirma Foundation Systems ranked 1,1718 out of 5,000 companies on Inc. Magazine's Fastest Growing Private Companies in America. In Oregon,... [Read more]
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Your Trusted Seattle, WA Foundation, Basement Experts

Trusted basement waterproofing, crawl space encapsulation, earthquake retrofitting, foundation repair & more! Call today!

Happy Customers Surrounding Seattle, WA
Work Requests

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Basement Waterproofing, Crawl Space Encapsulation, Crawl Space Repair, Foundation Repair Contractors & More in Seattle

TerraFirma has been your trusted basement waterproofing and foundation contractor since 2005. We provide repair services, exemplary customer service and proven products to homeowners in Seattle. Does your home have a musty basement or crawl space? Are you noticing cracks in your floors or walls?

TerraFirma handles an array of home repairs quickly & efficiently:

  • Basement Waterproofing
  • Foundation Repair
  • Foundation Wall Repair
  • Crawl Space Repair
  • Crawl Space Encapsulation
  • Earthquake Retrofitting
  • And many other services!

Call today for your FREE no cost, no obligation estimate for repairs in Seattle.

Basement Waterproofing

The benefits to waterproofing your leaky basement are endless. Say goodbye to leaking floors and windows, mold growth, grossly high utility bills and more. We specialize in basement repair and waterproofing to add useful square footage, in turn adding value to your home.

Our waterproofing solutions include:

  • Drainage systems
  • Sump pumps
  • Wall coverings
  • Waterproof basement flooring
  • Basement dehumidifiers
  • Window wells
  • And additional products to finally solve your wet basement problem!

Call us today to schedule your estimate!

Crawl space repair & encapsulation

The health of your crawl space can determine the health of the rest of your home. So if your crawl space is showing signs of mold growth, musty smells, rotting floor joists and other unpleasantness, chances are the rest of your structure will be affected. Crawl space repair will save your home from further damage, and encapsulating your crawl space will provide added storage space you never knew you needed! Our crawl space waterproofing & encapsulation processes include vapor barriers, sump pump installation, downspout extensions and crawl space doors and access wells.

Foundation repair

Are you seeing cracks in your foundation walls or floors? Perhaps a bowing exterior wall, uneven floors or cracked floors? If your Seattle home is showing signs of foundation issues, TerraFirma has the solution.

We solve any foundation problem, including:

  • Structural settlement
  • Ground and soil sinkage
  • Cracks in stone
  • Water stains
  • Sloping floors
  • Jammed windows
  • And more!

Call TerraFirma today for your no cost, no obligation FREE estimate for foundation repair. We look forward to helping your home.

News & Events From from Seattle
With constant maintenance and added expenses, being a homeowner involves a lot of responsibility, which can extend beyond your property...
With constant maintenance and added expenses, being a homeowner involves a lot of responsibility, which can extend beyond your property line.... [Read more]
Work Requests From Seattle, WA
in Seattle
We just bought a house that has slopping floors and would like to add additional support to the home to prevent further shifting. Thank you, Erica
Conkling Place W in Seattle
Tie down our house to foundation
Corliss Ave N in Seattle
100 year old house that is not bolted to the foundation.
in Seattle
During heavy rains we have water intrusion through a cement wall near a window well. We'd like to learn how to stop that problem
in Seattle
Earthquake retrofitting.
Latona Ave NE in Seattle
There are some cracks on the foundation outside the house and a few cracks inside that can be related to the house settling. I just wanted to make sure that the settling is normal and we only need to fix the cracks. I wanted to check for your professional opinion, estimate on fixing the cracks and/or estimate on permanent solution if the house is settling abnormally. Please reach me via my provided email. Thanks!
in Seattle
Need waterproofing solution for basement that floods with heavy rains.
Broadmoor Drive East in Seattle
Some minimal water damage to basement walls. Relatively small area. Think it was some water coming down outside wall through crack in foundation. Was interested in having someone come take a look, see extent of problem.
Brooklyn Ave NE in Seattle
I have a crack in my foundation, and it looks like my house is settling.
South Brandon Street in Seattle
We have a few cracks in the walls of our foundation that we need repaired so we don't get any more water in our basement.
in Seattle
I need new doors that seal off my crawl space better.
in Seattle
Small creek in front of house occasionally causes basement to flood. Thank you!
So Plum St in Seattle
My moms house has a small leak in the West wall of her house I want to get an estimate to be fixed.
in Seattle
Need to inspect my house foundation and repair cracks.
in Seattle
We have leaking through the foundation into the crawl space
in Seattle
I have a crawl space with floor joists that are sagging and would like an estimate on reinforcements under my house.
in Seattle
I have a SaniDry dehumidifier in my basement that empties into my sump. It seems to have stopped working. It runs continuously. I'd like some one to see if it can be repaired or replaced.
Evanston Ave N in Seattle
Flies in house, possibly related to crawl space issues. House recently bought, have not done anything with crawl space, so there is definitely room for improvement there. House very cold, as well.
in Seattle
We have a very old house up on a hill. We get leakage into our basement each winter with heavy rains. We would like to waterproof the basement so we can get it finished. Thank you.
E Shored Dr in Seattle
The south side of our home has over a very long period of time sunk. We are researching raising that side, repairing/replacing that foundation and possibly removing the dirt out of that area to make a clean, functional basement storage room.
Serving the following Seattle, WA zip codes
98101, 98102, 98103, 98104, 98105, 98106, 98107, 98108, 98109, 98111, 98112, 98113, 98114, 98115, 98116, 98117, 98118, 98119, 98121, 98122, 98124, 98125, 98126, 98127, 98129, 98131, 98133, 98134, 98136, 98138, 98139, 98141, 98144, 98145, 98146, 98148, 98154, 98155, 98158, 98160, 98161, 98164, 98165, 98166, 98168, 98170, 98174, 98175, 98177, 98178, 98181, 98185, 98188, 98190, 98191, 98194, 98195, 98198, 98199, 98101, 98102, 98103, 98104, 98105, 98106, 98107, 98108, 98109, 98111, 98112, 98113, 98114, 98115, 98116, 98117, 98118, 98119, 98121, 98122, 98124, 98125, 98126, 98127, 98129, 98131, 98133, 98134, 98136, 98138, 98139, 98141, 98144, 98145, 98146, 98148, 98154, 98155, 98158, 98160, 98161, 98164, 98165, 98166, 98168, 98170, 98174, 98175, 98177, 98178, 98181, 98185, 98188, 98190, 98191, 98194, 98195, 98198, 98199
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