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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
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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
Vicinity of in Seattle
I have a detached garage (10' x 18' with a loft) that has a large crack running through the slab, and it looks like it has sunk on one side of the crack. I'd love to get an estimate for repair. Thanks!
Vicinity of in Seattle
I'm having carpeting removed and installing vinyl flooring and noticed moisture where the wall meets the foundation in one spot. Looking for repair prior to installing new flooring.
Vicinity of in Seattle
Driveway settle and creaked slabs
Vicinity of in Seattle
Prior water seepage through our basement concrete led a mold issue. We repaired the water draining issue, and are currently remediating the mold damage, but are looking for foundation waterproofing to avoid in the future.
Vicinity of in Seattle
Settling foundation of a small home.
Vicinity of Belvidere Ave SW in Seattle
Need to install push piers to stabilise already-built deck. Have full geotechnical reports and as-builts for the deck, so just need approximate quote for installation. Thanks
Vicinity of Thackeray PL NE in Seattle
We have a 100 year old home in the Wallingford neighborhood of Seattle. Our finished basement has had a couple of leakages/seepages over the past couple of years. We would like to explore our options to prevent future leaks.
Vicinity of Corliss Ave N in Seattle
- Sagging floor on main level - Seismic retrofit
Vicinity of in Seattle
Looking for foundation repair and leveling from settling. Thank you~
Vicinity of in Seattle
We are interested in making some structural repairs to our home. We have sloping floor toward our former (and removed) fireplace, as well as some headers we are unsure of from previous homeowner remodels. We are also considering earthquake retrofitting.
Vicinity of in Seattle
I would like an estimate on a foundation repair and floor leveling project at our 1920s home in Seattle. We would like to complete this project during Summer 2019.
Vicinity of in Seattle
Sagging floors (crawlspace), cracks in walls.
Vicinity of in Seattle
Hello! We're look to install an egress window in our basement bedroom. We'd love to learn more about your services and get a quote. Thanks!
Vicinity of S Pilgrim St in Seattle
Leaking in basement (split level house) - where wall meets floor (floor boards).
Vicinity of in Seattle
We have some leaks in our finished basement. It's coming through the cinder block walls behind the drywall and puddling in the floor. We have installed a sump pump but we are still having some leaks. We were wondering if we could get some information on what we can do to to stop the leaks.
Vicinity of in Seattle
I need to have a sump pump installed as soon as possible. Can you let me know a range of potential costs and when I might be able to get something scheduled? Thanks and happy new year.
Vicinity of in Seattle
I have water pouring from concrete floor in basement. Floors in house are also not level.
Vicinity of 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
Vicinity of Conkling Place W in Seattle
Tie down our house to foundation
Vicinity of Corliss Ave N in Seattle
100 year old house that is not bolted to the foundation.
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