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Best basement waterproofing pros near Corvallis, OR

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TRUSTED BY CORVALLIS, OR HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon14
    Verified basement waterproofing services reviews

Top-Rated Basement waterproofing pros in Corvallis - Updated Nov 2026

Avatar for Groundworks
Groundworks
4.6(
915
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Corvallis, OR and surrounding areas

Approved (Corporate)

In business since 2021

Free estimates

Warranties offered

Groundworks is the North America's leading and fastest-growing foundation repair and water management solutions provider. Groundworks is a vertically integrated company with its own manufacturing operations and a world-class software solution, allowing us to serve our customers more effectively. From the first phone call to the annual maintenance offered, our customers have peace of mind knowing we're there with one mission to repair, protect and improve their home. For state licenses visit Groundworks.com/licensing

Basement
Basement
Basement
Concrete
Concrete

+20

8 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for John's Waterproofing Co.
John's Waterproofing Co.
4.0(
72
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Corvallis, OR and surrounding areas

Approved (Corporate)

In business since 1974

Free estimates

Warranties offered

"From beginning to end of the job,everything went pretty much as planned. The Work Crew , lead by the Foreman, Lupe were great , thorough and swift in their work. They left my basement the way that they found it and so far the equipment that they installed seems to be working well."
Encapsulation System
Before Encapsulation
Before Interior Drain System
After Interior Drain System
Finished basement

+38

Response time6 hrs
105 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for TerraFirma
TerraFirma
4.0(
105
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - RepairBasement Drainage Channels - Install

Serving Corvallis, OR and surrounding areas

Approved

Super Service Award Winner

In business since 2005

Free estimates

Emergency services offered

"I was please with the estimator, Boston's knowledge and willingness to walk me through the process and unfamiliar territory of basement waterproofing. He was very knowledgeable and answers so many questions, at the time of the walk through as well as in the days after when I had questions after receiving other bids and trying to compare them. In the end, it was just my low budget that kept me from going with Terra Firma. I thought their system was excellent, and would have worked well with my basement, but I had to opt for a less expensive design."
Crawl Space Encapsulation with TerraFirma
Basement Waterproofing with TerraFirma
Foundation Repair with TerraFirma
Concrete Lift and Repair with TerraFirma
Before - Basement Waterproofing in Eugene, OR

+33

Response time30 mins
50 neighbors recently requested a quote
Recommended by79%of homeowners
Avatar for Andrew Excavation & Septic, LLC
Andrew Excavation & Septic, LLC
5.0(
2
)
Basement Drainage Channels - Install

Serving Corvallis, OR and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

We are committed to understanding your unique needs and creating a plan to deliver a quality finished project. We pride ourselves on exceptional communication to provide understanding of all variables. In the PNW, drainage is the name of the game. We take on a variety of projects from preparing the site to build, to horse arena drainage systems, to septic system install. We are seasoned in working with utilities for power, water septic and to deliver to the site. As well as road building. Feel free to call with questions or concerns to ensure a good fit for all. 503830848 \n

Septic Repair
Septic Repair
ATT Septic System Install
ATT Septic System Install
ATT Septic System Install

+10

Response time1 day
Response rate100%
11 neighbors recently requested a quote
Avatar for DAVIDSONS HOME RESTORATION LLC
DAVIDSONS HOME RESTORATION LLC
New to Angi
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Corvallis, OR and surrounding areas

Approved

In business since 2020

Free estimates

DAVIDSONS HOME RESTORATION LLC is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have years of hands-on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

Attic mold remediation
Attic mold remediation
Bathroom remediation
Bathroom remediation
Bathroom remediation

+3

2 neighbors recently requested a quote
Avatar for WALL EXCAVATING & HAULING
WALL EXCAVATING & HAULING
New to Angi
Basement Drainage Channels - Install

Serving Corvallis, OR and surrounding areas

Approved

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of Excavation and Hauling services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction! \n

Gallery
8 neighbors recently requested a quote
Avatar for John's Waterproofing
John's Waterproofing
4.3(
252
)
Basement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - Install

Serving Corvallis, OR and surrounding areas

In business since 1974

Free estimates

Warranties offered

"From the first visit to my home from Sean for an estimate, to the crew that arrived to do the project I was impressed. Everyone was extremely professional. The crew arrived on time, the crew leader introduced me to the rest of the crew and explained how they would proceed with the project. They protected the work spaces with plastic from my garage to the crawl space opening in side my closet. They went to work and kept me informed about the progress. The whole crew worked very efficiently and got the project done in one day. They left work area spotless when they were done. I would highly recommend this company for any waterproofing project!!"
Trim around fireplace was removed and mold found along the base
Fiberglass was drooping away from the home, removing its insulation value
Fiberglass Insulation was falling down in clumps from water weight
This window had been upgraded and given trim to give a clean and finished look
Re removed the below-grade sections of the wall and waterproofed with ThermalDry Radiant vapor barrier and installed a drain system around the interior perimeter

+41

Response time9 hrs
Response rate100%
14 neighbors recently requested a quote
Showing 1-10 of 36
Basement Waterproofing FAQs, answered by experts

Water damage always poses a primary risk of mold and mildew, but growth is not guaranteed. The chances of mold developing depend on several factors, including the severity of the damage and how quickly the area is cleaned and dried. To prevent mold, you must act quickly—ideally within the first 24 hours. Clean up all water and thoroughly dry the affected area. If the damage is extensive, you were unable to address it immediately, or you suspect mold has already started to grow, it is best to assume it is present and hire a professional mold inspector or removal expert to assess the situation.

In most cases, it is safe to live in a home with minor foundation problems, but you should not let the issues persist. Virtually all foundations have small cracks from normal settlement, which are not a structural concern but should be sealed to prevent water intrusion. However, major damage—such as large structural cracks, sinking foundations, or bulging walls—can make a home unsafe. Other issues that can pose safety and health risks include poor indoor air quality from mold or pests, uneven floors, and rotten beams or joists. It is always best to have a foundation repair expert or structural engineer inspect any issues to determine if your home is safe to live in.

A crawl space can be as little as 42 inches below the grade of your house, but this is not always recommended in flood-prone areas. At a minimum, there must be at least 16 inches of clearance between the ground and the floor joists to access the space in an emergency.

Installing a bathroom in a basement isn’t a project for most homeowners. Many parts—plumbing, electricity, and carpentry—go into this project, each requiring expert-level knowledge and tools. One miscalculation can lead to very expensive repairs. Plus, some homeowner’s insurance might not pay for damages caused by a homeowner DIYing this project. You can protect yourself by allowing the pros to complete this job for you. 

One handy thing about whole-house dehumidifiers is, once installed, you don’t have to worry about placement or changing the dehumidifier’s position. But if you are using a portable dehumidifier, we suggest keeping it away from walls, vents, and furniture. It needs a central, unobstructed spot with access to lots of air to do its job.

The Corvallis, OR homeowners’ guide to basement waterproofing services

From average costs to expert advice, get all the answers you need to get your job done.