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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 October 26, 2025

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Avatar for TerraFirma Foundation Systems

TerraFirma Foundation Systems

13110 SW Wall Street
4.55(
218
)
•Approved Pro

TerraFirma Foundation Systems

13110 SW Wall Street
4.55(
218
)
•Approved Pro
Customers say: Super punctual
98 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 John's Waterproofing

John's Waterproofing

219 Airport Rd
4.30(
240
)
•Approved Pro

John's Waterproofing

219 Airport Rd
4.30(
240
)
•Approved Pro
Customers say: Super punctual
29 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 TerraFirma Foundation Systems

TerraFirma Foundation Systems

13110 SW Wall Street
4.60(
62
)
•Approved Pro

TerraFirma Foundation Systems

13110 SW Wall Street
4.60(
62
)
•Approved Pro
Customers say: True professional
82 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.

"We needed some posts in our basement replaced with proper footings. TerraFirma was quick to respond and quick to do the work. We are very happy with the result and would recommend."

Nicole C on December 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.

"We needed some posts in our basement replaced with proper footings. TerraFirma was quick to respond and quick to do the work. We are very happy with the result and would recommend."

Nicole C on December 2024

Avatar for John's Waterproofing Co.

John's Waterproofing Co.

201 Airport Road
4.74(
47
)
•Approved Pro

John's Waterproofing Co.

201 Airport Road
4.74(
47
)
•Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
406 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 Green Hills Construction

Green Hills Construction

339 W Niagara Ave
4.80(
32
)
•Approved Pro

Green Hills Construction

339 W Niagara Ave
4.80(
32
)
•Approved Pro
Super Service Award
Customers say: True professional
42 local quotes requested
25 years of experience

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.

"Green Hills was responsive, helpful with the design, started on time, and did high quality work for a fair price. They are at the top of our list for future projects. "

Mac C on October 2025

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.

"Green Hills was responsive, helpful with the design, started on time, and did high quality work for a fair price. They are at the top of our list for future projects. "

Mac C on October 2025

NW Quality Inc

No reviews yet

NW Quality Inc

No reviews yet
Free onsite estimate

NW Quality Inc. Been in business for 20yrs. We do Stucco, Stone, and waterproofing decks as well as patios, landings, balconies. Also work with epoxy. We mainly use WestCoat products for our waterproofing, texture coats, and epoxy. Stucco Eifs, and conventional. Veneer stone as well as Natural.

NW Quality Inc. Been in business for 20yrs. We do Stucco, Stone, and waterproofing decks as well as patios, landings, balconies. Also work with epoxy. We mainly use WestCoat products for our waterproofing, texture coats, and epoxy. Stucco Eifs, and conventional. Veneer stone as well as Natural.

Avatar for Upfront Construction LLC

Upfront Construction LLC

P.O. Box 8156
5.00(
7
)

Upfront Construction LLC

P.O. Box 8156
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

Avatar for RP Builders Construction

RP Builders Construction

P.O. Box 1574
No reviews yet

RP Builders Construction

P.O. Box 1574
No reviews yet
21 years of experience

Contact Robert, with RP Builders Construction for all you residential and commercial Projects you have. "No Job To Small, We do it All!" Also check us out at ANGIES LIST. OFFICE: 541-270-6860 FAX: 541-563-6894 SOME OF THE SERVICES WE PROVIDE: INSURANCE CLAIM WORK, KITHEN AND BATH REMODELS, COMMERCIAL REMODELS. NEW CONSTRUCTION, DOORS AND WINDOWS, ROOFING & ROOF REPAIR. DRYWALL WORK NEW AND REPAIR. WATER DAMAGE REPAIR AND RESTORATION. MOLD AND MOSS REMOVAL, POWERWASHING. HARDWOOD, LAMINATE, TILE FLOORING. DECKS & PATIOS. CARPENTRY ROUGH & FINISH. FRAMING WOOD & STEAL. JUST A FEW OF THE SERVICES WE PROVIDE THANKS FOR CHECKING US OUT, LOOKING FOWARD TO TALKING TO YOU.

Contact Robert, with RP Builders Construction for all you residential and commercial Projects you have. "No Job To Small, We do it All!" Also check us out at ANGIES LIST. OFFICE: 541-270-6860 FAX: 541-563-6894 SOME OF THE SERVICES WE PROVIDE: INSURANCE CLAIM WORK, KITHEN AND BATH REMODELS, COMMERCIAL REMODELS. NEW CONSTRUCTION, DOORS AND WINDOWS, ROOFING & ROOF REPAIR. DRYWALL WORK NEW AND REPAIR. WATER DAMAGE REPAIR AND RESTORATION. MOLD AND MOSS REMOVAL, POWERWASHING. HARDWOOD, LAMINATE, TILE FLOORING. DECKS & PATIOS. CARPENTRY ROUGH & FINISH. FRAMING WOOD & STEAL. JUST A FEW OF THE SERVICES WE PROVIDE THANKS FOR CHECKING US OUT, LOOKING FOWARD TO TALKING TO YOU.

Green Rising Construction, LLC

PO Box 7276
5.00(
1
)

Green Rising Construction, LLC

PO Box 7276
5.00(
1
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Green Rising is a meticulous, full service general contractor with the knowledge and experience to handle all of your remodeling and building needs. We pride ourselves with instilling trust in our clients and developing extraordinary client/contractor/subcontractor relationships. We specialize in providing high quality sustainable solutions for all of your projects, including renovations and remodels of any size, small "to do" lists, custom homes, and making your older homes energy performance meet tomorrows demanding energy requirements. Whatever your building or remodeling needs, we can help get it done, and get it done right.

Green Rising is a meticulous, full service general contractor with the knowledge and experience to handle all of your remodeling and building needs. We pride ourselves with instilling trust in our clients and developing extraordinary client/contractor/subcontractor relationships. We specialize in providing high quality sustainable solutions for all of your projects, including renovations and remodels of any size, small "to do" lists, custom homes, and making your older homes energy performance meet tomorrows demanding energy requirements. Whatever your building or remodeling needs, we can help get it done, and get it done right.

Showing 1-10 of 14
Basement Waterproofing questions, answered by experts

Yes, it’s worth it to repair a crawl space foundation, even if the issue seems relatively minor. Foundation problems often get worse and more expensive to fix if you leave them untreated. Additionally, your entire home, from the framing and flooring to the roof system, relies on the foundation for even and level support. Issues with your foundation will almost always manifest as problems in and above your living space, so it’s important to find a solution.

Crawl spaces are prone to issues caused by excess humidity and improper ventilation, but that doesn’t mean you should avoid buying a house with a crawl space. A home that is encapsulated and well-maintained shouldn’t have any more issues than a slab or basement home.

Interlocking garage tiles made with PVC are the most effective for garages with past issues of humidity and flooding because damp concrete is not suitable for paint. Epoxy coating is also water-resistant and can prevent mold buildup. Finally, porcelain tiles are a wonderful option for wet conditions if your budget allows.

The best way to waterproof a basement is to install a properly functioning gutter system and a French drain around the outside of the foundation. The best solution for your home could involve other waterproofing methods that resolve the problem unique to your situation. Depending on your soil type, climate, and other factors, that could include sealing, landscape alteration, interior drainage systems, and more.

Underfloor insulation alone will not cause moisture and mold, but improper installation can. Although the purpose is to seal any drafts, your subfloor still needs ventilation. If you seal the area too tightly and prevent all airflow, this can cause moisture to get trapped. This moisture eventually leads to mold and—if your floors are wood—rotting.

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.

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