Top-rated basement waterproofing pros.

Get matched with top basement waterproofing pros in Rainier, OR

Enter your zip and get matched with up to 5 pros

Need a pro for your basement waterproofing project in Rainier, OR?

Select your specific project to find the pro for you.

TRUSTED BY RAINIER, OR HOMEOWNERS

  • Average homeowner rating star icon4.1
    Average homeowner rating
  • Verified reviews icon102
    Verified basement waterproofing services reviews

Verified Reviews for Basement Waterproofing pros in Rainier, OR

*The Angi rating for Basement Waterproofing companies in Rainier, OR is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

*The HomeAdvisor rating for Basement Waterproofing companies in Rainier, OR is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

Last update on November 16, 2025

Find Basement waterproofing pros in Rainier

Avatar for TerraFirma Foundation Systems

TerraFirma Foundation Systems

4.55(
218
)
•Approved Pro

TerraFirma Foundation Systems

4.55(
218
)
•Approved Pro
Customers say: Super punctual
88 local quotes requested
20 years of experience

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"I hired TerraFirma Foundation Systems to level my home, expecting a professional job with clear communication, but the entire experience has been incredibly disappointing and costly. From the start, I hired the company to level the floors in my home, specifically to address a nearly 3-inch dip in my kitchen area, a 13x10 room. Yet after they “completed the job,” I still have a 1.5-inch dip in the center of the kitchen, and a corner of my home/kitchen that sits half an inch higher than it should be (above 0%), creating a full inch rise from the living room to the kitchen. Now they’re saying that leveling the kitchen wasn’t included in the original scope, blaming the remaining dip on my kitchen island and fridge being “too heavy” and lacking proper support—an issue they failed to identify in the initial assessment. To properly address this problem, they’re now asking for an additional $7,500, claiming this work was never part of the original job. This feels like a classic bait-and-switch tactic, and I can’t help but feel taken advantage of. To make matters worse, I discovered that they used an uncalibrated machine during the initial leveling when installing, which raised my house over an inch more than necessary, causing significant damage that wasn’t there before. Partway through the lift, they even asked me to sign a waiver to get my house closer to 0% level, effectively absolving them of any damage caused. The technician stopped mid-lift to show me the damage that was already occurring and warned that more would likely follow if we continued. I agreed to proceed, trusting their assurances and assuming their equipment was properly calibrated. I even pointed out to the technician at the time that it did not look level, and he assured me the machine was correct. Now, they refuse to take any responsibility for the resulting damage, dismissing it as “standard” and providing terms within the contract absolving them—despite them overcorrecting the home. There were also repeated measurement discrepancies, with reports showing one reading and verbal statements/emails suggesting different levels. When I sought clarification, I received vague responses and empty apologies. After all this, and nearly $30,000 invested, my floor remains unleveled. The only resolution TerraFirma Foundation Systems has offered is for me to pay additional money to level the kitchen and to wait for the overcorrected area to “settle naturally”—a process that, according to their technician, could take anywhere from two months to ten years. I hired TerraFirma Foundation Systems to fully level my home, not to leave me with an incomplete job, inconsistent results, and vague promises. If you’re considering foundation work, I strongly recommend looking elsewhere—this company has left me with extensive damage, unexpected costs, and a significant amount of frustration."

Chuck G on November 2024

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"I hired TerraFirma Foundation Systems to level my home, expecting a professional job with clear communication, but the entire experience has been incredibly disappointing and costly. From the start, I hired the company to level the floors in my home, specifically to address a nearly 3-inch dip in my kitchen area, a 13x10 room. Yet after they “completed the job,” I still have a 1.5-inch dip in the center of the kitchen, and a corner of my home/kitchen that sits half an inch higher than it should be (above 0%), creating a full inch rise from the living room to the kitchen. Now they’re saying that leveling the kitchen wasn’t included in the original scope, blaming the remaining dip on my kitchen island and fridge being “too heavy” and lacking proper support—an issue they failed to identify in the initial assessment. To properly address this problem, they’re now asking for an additional $7,500, claiming this work was never part of the original job. This feels like a classic bait-and-switch tactic, and I can’t help but feel taken advantage of. To make matters worse, I discovered that they used an uncalibrated machine during the initial leveling when installing, which raised my house over an inch more than necessary, causing significant damage that wasn’t there before. Partway through the lift, they even asked me to sign a waiver to get my house closer to 0% level, effectively absolving them of any damage caused. The technician stopped mid-lift to show me the damage that was already occurring and warned that more would likely follow if we continued. I agreed to proceed, trusting their assurances and assuming their equipment was properly calibrated. I even pointed out to the technician at the time that it did not look level, and he assured me the machine was correct. Now, they refuse to take any responsibility for the resulting damage, dismissing it as “standard” and providing terms within the contract absolving them—despite them overcorrecting the home. There were also repeated measurement discrepancies, with reports showing one reading and verbal statements/emails suggesting different levels. When I sought clarification, I received vague responses and empty apologies. After all this, and nearly $30,000 invested, my floor remains unleveled. The only resolution TerraFirma Foundation Systems has offered is for me to pay additional money to level the kitchen and to wait for the overcorrected area to “settle naturally”—a process that, according to their technician, could take anywhere from two months to ten years. I hired TerraFirma Foundation Systems to fully level my home, not to leave me with an incomplete job, inconsistent results, and vague promises. If you’re considering foundation work, I strongly recommend looking elsewhere—this company has left me with extensive damage, unexpected costs, and a significant amount of frustration."

Chuck G on November 2024

Avatar for TerraFirma Foundation Systems

TerraFirma Foundation Systems

4.62(
65
)
•Approved Pro

TerraFirma Foundation Systems

4.62(
65
)
•Approved Pro
Customers say: True professional
83 local quotes requested
20 years of experience

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"They got it right to the best of their ability with the budget I had available to work with. My expectations were met 100 percent. Did they correct 100 percent of my 60 year old foundation? They did the best they could exceeding my expectation and then returned money that I thought was spent because they found a clever way to save some time once they got here and were in the middle of the job……the core of who they are reveals their honesty and they returned thousands of dollars. That was fresh and unexpected…..word!"

Matthew B on November 2025

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"They got it right to the best of their ability with the budget I had available to work with. My expectations were met 100 percent. Did they correct 100 percent of my 60 year old foundation? They did the best they could exceeding my expectation and then returned money that I thought was spent because they found a clever way to save some time once they got here and were in the middle of the job……the core of who they are reveals their honesty and they returned thousands of dollars. That was fresh and unexpected…..word!"

Matthew B on November 2025

Avatar for John's Waterproofing Co.

John's Waterproofing Co.

4.74(
47
)
•Approved Pro

John's Waterproofing Co.

4.74(
47
)
•Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
407 local quotes requested

John's Waterproofing Co. is the premier waterproofing company serving in Oregon and southern Washington for almost 4 decades. We Specialize in Basement and Crawlspace Waterproofing and Repairs, we offer free inspections and estimates along with caring customer service. Contact our office today for your waterproofing needs!

"No."

Tracy W on January 2025

John's Waterproofing Co. is the premier waterproofing company serving in Oregon and southern Washington for almost 4 decades. We Specialize in Basement and Crawlspace Waterproofing and Repairs, we offer free inspections and estimates along with caring customer service. Contact our office today for your waterproofing needs!

"No."

Tracy W on January 2025

Avatar for John's Waterproofing

John's Waterproofing

4.58(
185
)
•Approved Pro

John's Waterproofing

4.58(
185
)
•Approved Pro
Customers say: Super punctual
34 local quotes requested
51 years of experience

Since 1974, John's Waterproofing has been helping the PNW have dry and healthy homes. We specialize in below-grade waterproofing for crawlspaces and basements. In addition to this we also provide radon testing and mitigation, and humidity and mold control. We are proud to offer the best in the industry solutions to your homes waterproofing needs. Cost is determined by the job. CCB#15830 (503) 873-5650 [email protected]

"Chris and Joel were great, they were in and out and our water heater was rewired and sump pump wired in no time at all."

Dawn S on May 2025

Since 1974, John's Waterproofing has been helping the PNW have dry and healthy homes. We specialize in below-grade waterproofing for crawlspaces and basements. In addition to this we also provide radon testing and mitigation, and humidity and mold control. We are proud to offer the best in the industry solutions to your homes waterproofing needs. Cost is determined by the job. CCB#15830 (503) 873-5650 [email protected]

"Chris and Joel were great, they were in and out and our water heater was rewired and sump pump wired in no time at all."

Dawn S on May 2025

Avatar for Octopus Project Management LLC

Octopus Project Management LLC

4.77(
22
)

Octopus Project Management LLC

4.77(
22
)
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

Octopus Project Management LLC. is a Disaster Reconstruction firm focused on mitigation and rebuilding of residential and commercial buildings undergoing the restoration claims process. We are General contractors able to take on a multitude of different types of home projects. our project minimum is around $350 plus materials as a standard trip charge and increases hourly for smaller projects. Estimates are free and can typically be provided same day.

"Amazing customer service, did exactly what I needed done!"

Sidney S on June 2025

Octopus Project Management LLC. is a Disaster Reconstruction firm focused on mitigation and rebuilding of residential and commercial buildings undergoing the restoration claims process. We are General contractors able to take on a multitude of different types of home projects. our project minimum is around $350 plus materials as a standard trip charge and increases hourly for smaller projects. Estimates are free and can typically be provided same day.

"Amazing customer service, did exactly what I needed done!"

Sidney S on June 2025

Avatar for Upfront Construction LLC

Upfront Construction LLC

5.00(
7
)

Upfront Construction LLC

5.00(
7
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Upfront Construction LLC is a family owned and operated and is fully licensed, bonded and insured. Our business has shown to be choice worthy of becoming a go-to source for various interior and exterior residential maintenance. We are consistently striving to make the best experience in any given task. No task is to small whether it be a repair or total remodel. We specialize in basement and crawl space waterproofing. We offer free estimates!!

"This company was on top of getting the work done, provided clear estimates, and followed through with the repairs described. It was a multi-layered project that could have been confusing to track, but they made it easy."

Stephen A on October 2024

Upfront Construction LLC is a family owned and operated and is fully licensed, bonded and insured. Our business has shown to be choice worthy of becoming a go-to source for various interior and exterior residential maintenance. We are consistently striving to make the best experience in any given task. No task is to small whether it be a repair or total remodel. We specialize in basement and crawl space waterproofing. We offer free estimates!!

"This company was on top of getting the work done, provided clear estimates, and followed through with the repairs described. It was a multi-layered project that could have been confusing to track, but they made it easy."

Stephen A on October 2024

GNC Construction

No reviews yet

GNC Construction

No reviews yet
Free onsite estimate

GNC Construction has a combined total of 40 plus years of experience. We specialize in residential and commercial building. Our staff is experienced in many different trades and we take pride in our craftsmanship and detail. With backgrounds in drywall, steel and wood framing GNC Construction has expanded out to numerous trades. We are certified in steel work, siding, all building trades, painting, plumbing, electrical.

GNC Construction has a combined total of 40 plus years of experience. We specialize in residential and commercial building. Our staff is experienced in many different trades and we take pride in our craftsmanship and detail. With backgrounds in drywall, steel and wood framing GNC Construction has expanded out to numerous trades. We are certified in steel work, siding, all building trades, painting, plumbing, electrical.

Eco Concrete Design

No reviews yet

Eco Concrete Design

No reviews yet
45 years of experience

Eco friendly & green concrete general contractor with 35+ years experience - in the Portland, Oregon & Washington areas. Handles industrial, commercial & residential projects & any excavation, foundations & flatwork needed.

Eco friendly & green concrete general contractor with 35+ years experience - in the Portland, Oregon & Washington areas. Handles industrial, commercial & residential projects & any excavation, foundations & flatwork needed.

Pragmatic Services LLC

No reviews yet

Pragmatic Services LLC

No reviews yet
48 years of experience

Pragmatic Tree Health Care: A Division of Pragmatic Solutions LLC Our Arborist has served thousands of customers and cared for the trees in Oregon's park sand cities for over 25 years. http://www.pragmatictreehealthcare.com Tree Health Care Landscape Design Pruning and Shaping Therapeutic Root Fertilization Eco Friendly Insect & Disease Control Soil Analysis & Enhancement Consulting & Reports Viewscaping & Cabling Mulching & Root Barriers Transplanting Irrigation Planning and Design Pragmatic Home Solutions: A Division of Pragmatic Solutions LLC We are skilled in all phases of indoor and outdoor phases of construction. http://www.pragmatichomesolutions.com Construction Planning, Design &, Permitting Complete Remodeling Service Residential & Commercial Damage Control & Restoration Maintenance & Project Management Customized Solutions Tile & Stonework Decks, Fencing, & Retaining Walls Additions - Conversions Water Problems - French Drains Painting & Staining Windows & Doors, Lighting & Security Disability & Access, Senior Safety Seismic Retrofitting

Pragmatic Tree Health Care: A Division of Pragmatic Solutions LLC Our Arborist has served thousands of customers and cared for the trees in Oregon's park sand cities for over 25 years. http://www.pragmatictreehealthcare.com Tree Health Care Landscape Design Pruning and Shaping Therapeutic Root Fertilization Eco Friendly Insect & Disease Control Soil Analysis & Enhancement Consulting & Reports Viewscaping & Cabling Mulching & Root Barriers Transplanting Irrigation Planning and Design Pragmatic Home Solutions: A Division of Pragmatic Solutions LLC We are skilled in all phases of indoor and outdoor phases of construction. http://www.pragmatichomesolutions.com Construction Planning, Design &, Permitting Complete Remodeling Service Residential & Commercial Damage Control & Restoration Maintenance & Project Management Customized Solutions Tile & Stonework Decks, Fencing, & Retaining Walls Additions - Conversions Water Problems - French Drains Painting & Staining Windows & Doors, Lighting & Security Disability & Access, Senior Safety Seismic Retrofitting

...
Showing 1-10 of 75
Basement Waterproofing questions, answered by experts

Crawl spaces are the more desirable option overall because they provide additional space for storage and utilities, but they are more expensive to install and maintain. Slab foundations are considered a better option in warmer climates where the depth of the frost line isn’t an issue because they’re more affordable, but crawl spaces are better in areas where the frost line is deep or where flooding can be an issue.

While it’s possible to live in a damp basement, it’s usually not healthy to do so. Damp air affects your breathing, and it also promotes mold growth and pest infestation that can make living in a damp basement dangerous. You should plan to resolve any moisture issues and set up preventative measures before using your basement as a living space.

Yes, water coming up from the floor should be treated as an emergency. If you're unable to either identify or stop the source of the water on your own, contact an emergency plumber right away. In addition to harming your flooring, standing or pooled water can lead to water-damaged concrete.

Living in a finished basement is acceptable, but only if the space has the proper points of egress and includes smoke and carbon monoxide (CO) detectors to ensure the safety of the occupants. A good way to ensure your finished basement is suitable for use as living space is to get the basement finishing project properly permitted.

Costs depend on the area's size and condition, damage extent, and chosen method. A professional evaluation provides a tailored estimate based on specific needs.

The Rainier, OR homeowners’ guide to basement waterproofing services

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

See all articles