
Get matched with top basement waterproofing pros in Seaside, OR
Enter your zip and get matched with up to 5 pros
Need a pro for your basement waterproofing project in Seaside, OR?
Verified Reviews for Basement Waterproofing pros in Seaside, OR
*The Angi rating for Basement Waterproofing companies in Seaside, 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 Seaside, 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 January 13, 2026
Find Basement waterproofing pros in Seaside

TerraFirma Foundation Systems
TerraFirma Foundation Systems
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

John's Waterproofing
John's Waterproofing
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

Green Hills Construction
Green Hills Construction
We are the ONLY seamless, ONE-STOP answer to all of your indoor and outdoor construction needs. Our highly experienced professional staff of experts include General Construction of residential and commercial projects. Our ground up construction company allows for us to remain attentive to details throughout all phases of construction. We can build your dream home or your back yard he/she shed. We can also do a variety of landscapes. We are landscape contractors licensed in all phases, from concrete, irrigation, and grading to plant design and installation. We have over 35 years' experience. Please give Derek Gilliland a call to set up your next project.
"Not only did Derrick and his crew completely redo the foundation of our house plus install flooring, but they were timely polite communicative easy to work with and did an excellent job. I can’t say enough good things about them. They took over a project in the middle of it and coordinated with us as it’s our vacation home and we don’t live in the same town. I can’t begin to tell you how much we appreciate them and will be using them in the future!!!"
Alena D on January 2026
We are the ONLY seamless, ONE-STOP answer to all of your indoor and outdoor construction needs. Our highly experienced professional staff of experts include General Construction of residential and commercial projects. Our ground up construction company allows for us to remain attentive to details throughout all phases of construction. We can build your dream home or your back yard he/she shed. We can also do a variety of landscapes. We are landscape contractors licensed in all phases, from concrete, irrigation, and grading to plant design and installation. We have over 35 years' experience. Please give Derek Gilliland a call to set up your next project.
"Not only did Derrick and his crew completely redo the foundation of our house plus install flooring, but they were timely polite communicative easy to work with and did an excellent job. I can’t say enough good things about them. They took over a project in the middle of it and coordinated with us as it’s our vacation home and we don’t live in the same town. I can’t begin to tell you how much we appreciate them and will be using them in the future!!!"
Alena D on January 2026

TerraFirma Foundation Systems
TerraFirma Foundation Systems
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.
"Schyler arrived at the appointed time explained the the process and how the equipment worked. After he finished he walked me through the completed work. He had cleaned up all the leftover residue explaining if there was any further movement in the work there was a five year warranty and he would return to correct it at no additional cost."
Bob J on December 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.
"Schyler arrived at the appointed time explained the the process and how the equipment worked. After he finished he walked me through the completed work. He had cleaned up all the leftover residue explaining if there was any further movement in the work there was a five year warranty and he would return to correct it at no additional cost."
Bob J on December 2025

John's Waterproofing Co.
John's Waterproofing Co.
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
Bellos Construction
Bellos Construction
We pride our company on reliability, great communication, integrity, and quality work. We have 15 years of experience in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!
"We actually had Bellos Construction do considerably more than just a bathroom remodel. Additional work included installing flooring, installing insulation and drywall, demolition work, roofing repair, etc. Overall the experience was good. Jose is very responsive and helped me out quite a bit dealing with renovating and repairing an older house that was not properly taken care of by the previous owners/renters. The only real issue we had was confirming the materials that would be installed in the bathroom (i.e., fixtures, etc). There was some miscommunication there that probably was not helped by the fact we are out of state and trying to manage a construction project. One thing that stood out about Jose was his willingness to help out with things that didn't fall under his contractual obligations. For example, he helped me transport a water tank when he didn't need to do so. If we have a need for services that Bellos Construction offers, then we will definitely consider them in the future given our experiences with them."
aaron v on March 2023
We pride our company on reliability, great communication, integrity, and quality work. We have 15 years of experience in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!
"We actually had Bellos Construction do considerably more than just a bathroom remodel. Additional work included installing flooring, installing insulation and drywall, demolition work, roofing repair, etc. Overall the experience was good. Jose is very responsive and helped me out quite a bit dealing with renovating and repairing an older house that was not properly taken care of by the previous owners/renters. The only real issue we had was confirming the materials that would be installed in the bathroom (i.e., fixtures, etc). There was some miscommunication there that probably was not helped by the fact we are out of state and trying to manage a construction project. One thing that stood out about Jose was his willingness to help out with things that didn't fall under his contractual obligations. For example, he helped me transport a water tank when he didn't need to do so. If we have a need for services that Bellos Construction offers, then we will definitely consider them in the future given our experiences with them."
aaron v on March 2023

American Leak Detection - Oregon
American Leak Detection - Oregon
American Leak Detection offers the highest level of expertise in the field of leak detection and line locating. We are licensed and bonded in Oregon and Washington. Award winning.
"They showed up right on time and quickly found the source of the problem."
William H on January 2019
American Leak Detection offers the highest level of expertise in the field of leak detection and line locating. We are licensed and bonded in Oregon and Washington. Award winning.
"They showed up right on time and quickly found the source of the problem."
William H on January 2019

Upfront Construction LLC
Upfront Construction LLC
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

Dorian Visionheart Dyer
Dorian Visionheart Dyer
I am a self-taught artist, initially drawn to experiment with pastels and colored pencil, and now working with acrylic on canvas. My art speaks for itself.
I am a self-taught artist, initially drawn to experiment with pastels and colored pencil, and now working with acrylic on canvas. My art speaks for itself.
Velazquez Painting & Construction LLC
Velazquez Painting & Construction LLC
At Velazquez Painting & Construction we put quality and customer service first. Our highly trained and experienced craftsmen are dedicated to making sure that you, the Customer, are completely satisfied with your home or commercial project. It is our goal to gain you as a customer for life.
"They did a wonderful job, good people, very kind, polite and they did a great job."
Nancy F on December 2019
At Velazquez Painting & Construction we put quality and customer service first. Our highly trained and experienced craftsmen are dedicated to making sure that you, the Customer, are completely satisfied with your home or commercial project. It is our goal to gain you as a customer for life.
"They did a wonderful job, good people, very kind, polite and they did a great job."
Nancy F on December 2019
The Seaside, OR homeowners’ guide to basement waterproofing services
From average costs to expert advice, get all the answers you need to get your job done.
•Need to fix basement water problems or safeguard your home from damage in the future? Use this basement waterproofing cost guide to budget appropriately.

Crawl space repair costs can seem intimidating, but putting them off can lead to bigger issues. Learn about repair costs in this guide to set your budget.
•A variety of factors can affect your total crawl space encapsulation cost. Here’s a breakdown of the cost of this project, whether you hire a pro or DIY.

Choosing where the sump pump water goes affects the effectiveness and longevity of your sump pump system. These tips can help guide you in the right direction.

This handy, step-by-step guide teaches DIYers how to keep floodwater out of the house, and it’s designed for any property or climate.

Waterproofing your basement is important to protect your home. Follow these tips to ensure that you hire the right waterproofing contractor for the job.
- Gearhart, OR Basement waterproofing pros
- Cannon Beach, OR Basement waterproofing pros
- Warrenton, OR Basement waterproofing pros
- Astoria, OR Basement waterproofing pros
- Hammond, OR Basement waterproofing pros
- Manzanita, OR Basement waterproofing pros
- Nehalem, OR Basement waterproofing pros
- Wheeler, OR Basement waterproofing pros
- Ilwaco, WA Basement waterproofing pros
- Seaview, WA Basement waterproofing pros
- Long Beach, WA Basement waterproofing pros
- Rockaway Beach, OR Basement waterproofing pros
- Garibaldi, OR Basement waterproofing pros
- Cathlamet, WA Basement waterproofing pros
- Birkenfeld, OR Basement waterproofing pros
- Clatskanie, OR Basement waterproofing pros
- Bay City, OR Basement waterproofing pros
- Vernonia, OR Basement waterproofing pros
- Ocean Park, WA Basement waterproofing pros
- Tillamook, OR Basement waterproofing pros
- Netarts, OR Basement waterproofing pros
- Buxton, OR Basement waterproofing pros
- Gales Creek, OR Basement waterproofing pros
- Banks, OR Basement waterproofing pros
- Menlo, WA Basement waterproofing pros
- Raymond, WA Basement waterproofing pros
- South Bend, WA Basement waterproofing pros
- Rainier, OR Basement waterproofing pros
- Longview, WA Basement waterproofing pros
- Pe Ell, WA Basement waterproofing pros
- 🌱 "Mow a small front yard"
- 🛠 "Fix a leaking pipe under the sink"
- 🏠 "Repair shingles on an asphalt roof"







