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TRUSTED BY CORNELIUS, OR HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon80
    Verified foundation repairs reviews

Find Foundation repair specialists in Cornelius

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
95 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
4.61(
63
)
Approved Pro

TerraFirma Foundation Systems

13110 SW Wall Street
4.61(
63
)
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 had a complete encapsulation of our crawl space and sump pump and humidifier system installed. The young men who did the work were very professional. Antonio was the project manager and he was fantastic. Answered questions, explained the process, and made sure we were ok with what they were doing. They showed up at the time designated and called if they would be late. Communication was very good. Shout out to his helpers, Daniel, Jesse, and Kameron. At the end of the project they cleaned up the workspace and made sure things were left like it was before project. Thanks guys."

Carol F on October 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.

"We had a complete encapsulation of our crawl space and sump pump and humidifier system installed. The young men who did the work were very professional. Antonio was the project manager and he was fantastic. Answered questions, explained the process, and made sure we were ok with what they were doing. They showed up at the time designated and called if they would be late. Communication was very good. Shout out to his helpers, Daniel, Jesse, and Kameron. At the end of the project they cleaned up the workspace and made sure things were left like it was before project. Thanks guys."

Carol F on October 2025


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
408 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 Tyeco Home Services, LLC

Tyeco Home Services, LLC

PO Box 927
5.00(
6
)
Approved Pro

Tyeco Home Services, LLC

PO Box 927
5.00(
6
)
Approved Pro
Customers say: Quick response
3 years of experience
Free onsite estimate

Tyeco Home Services is a family owned, local business. My main goal in business is to make as many people happy as possible. I have 20+ years of construction experience primarily doing concrete, carpentry, and structural repairs. I’ve also been certified and have a lot of experience in Water and Fire damage restoration and Mold mitigation. For any of your Home Service needs, reach out to us. If there is something you need done that we don’t do, we have trusted partners in most every trade. Thank you, Tysen Massie

"Tysen was wonderful to work with! He worked quickly without sacrificing quality - and I am so impressed! He was friendly, professional, and extremely knowledgeable. Thank you Tysen!"

Kelsie P on April 2023

Tyeco Home Services is a family owned, local business. My main goal in business is to make as many people happy as possible. I have 20+ years of construction experience primarily doing concrete, carpentry, and structural repairs. I’ve also been certified and have a lot of experience in Water and Fire damage restoration and Mold mitigation. For any of your Home Service needs, reach out to us. If there is something you need done that we don’t do, we have trusted partners in most every trade. Thank you, Tysen Massie

"Tysen was wonderful to work with! He worked quickly without sacrificing quality - and I am so impressed! He was friendly, professional, and extremely knowledgeable. Thank you Tysen!"

Kelsie P on April 2023


Patrick Masonry & Concrete

11345 Northeast San Rafael
4.84(
89
)
Approved Pro

Patrick Masonry & Concrete

11345 Northeast San Rafael
4.84(
89
)
Approved Pro
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
33 local quotes requested

Welcome to Patrick Masonry & Concrete. We are committed to providing the highest quality products and customer service in the industry, and we believe that our employees are among our most valued assets. Our culture is built upon a simple set of values which we are proud to share. We value every customer and are dedicated to understanding your needs. Give us a call today!

"Patrick and his son were great. Good pricing, great looking work. Cleaned up site. Went beyond what he had to to make the project look really nice. I will hire Patrick again when I need concrete work. "

Mark M on October 2025

Welcome to Patrick Masonry & Concrete. We are committed to providing the highest quality products and customer service in the industry, and we believe that our employees are among our most valued assets. Our culture is built upon a simple set of values which we are proud to share. We value every customer and are dedicated to understanding your needs. Give us a call today!

"Patrick and his son were great. Good pricing, great looking work. Cleaned up site. Went beyond what he had to to make the project look really nice. I will hire Patrick again when I need concrete work. "

Mark M on October 2025


Avatar for Pacific Waterproofing and Foundation Solutions LLC

Pacific Waterproofing and Foundation Solutions LLC

6404 Lincoln Avenue
5.00(
1
)

Pacific Waterproofing and Foundation Solutions LLC

6404 Lincoln Avenue
5.00(
1
)
Free onsite estimate

Trusted by thousands of homeowners in the Pacific Northwest for expert waterproofing, crawl space repair and foundation repair. At Pacific Waterproofing, LLC, we take great pride in our experience, expertise, quality and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Trusted by thousands of homeowners in the Pacific Northwest for expert waterproofing, crawl space repair and foundation repair. At Pacific Waterproofing, LLC, we take great pride in our experience, expertise, quality and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.


"I had RMC replace a small back deck last year with a concrete patio. Matt and team did a great job on it along with cleaning up after they were done."

Jim H on July 2025

We specialize in outdoor projects such as concrete, roofing, patios, windows and siding. let us take care of all your outdoor projects you don't want to do.

"I had RMC replace a small back deck last year with a concrete patio. Matt and team did a great job on it along with cleaning up after they were done."

Jim H on July 2025


Foundation Pro LLc

1021 S Park St
No reviews yet

Foundation Pro LLc

1021 S Park St
No reviews yet
3 years of experience

Your Northwest Oregon foundation and crawl space expert. Call today and discuss the problems you are having and find the solution for you. We take care of your needs; things like fractures in your foundation, proper air flow through your crawlspace, rot and termite damage, or uneven/sagging floors.

Your Northwest Oregon foundation and crawl space expert. Call today and discuss the problems you are having and find the solution for you. We take care of your needs; things like fractures in your foundation, proper air flow through your crawlspace, rot and termite damage, or uneven/sagging floors.


Avatar for All Oregon Concrete LLC

All Oregon Concrete LLC

20120 SW Johnson St
5.00(
3
)

All Oregon Concrete LLC

20120 SW Johnson St
5.00(
3
)
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Our business provides foundation, walkways, patios, driveways, retaining walls and more. We thrive on costumer satisfactory, and guarantee that the job is done right. All Oregon Concrete LLC was started in 2015 but have been in the concrete industry for over 25 years. That being said feel free to reach out for a an estimate at no cost!

"It was great! I worked with them for many years."

Chad E on January 2023

Our business provides foundation, walkways, patios, driveways, retaining walls and more. We thrive on costumer satisfactory, and guarantee that the job is done right. All Oregon Concrete LLC was started in 2015 but have been in the concrete industry for over 25 years. That being said feel free to reach out for a an estimate at no cost!

"It was great! I worked with them for many years."

Chad E on January 2023

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Foundation Repair questions, answered by experts

Yes, slab foundations can sink just like any other foundation type. Floating slabs are the most prone to differential settlement and foundation sinking because they sit directly on the surface of the earth. Slab foundations that have footings—including slab-on-grade foundations and monolithic slab foundations—get additional support from soil further down and are less likely to sink over time, especially under larger, heavier structures.

If you don’t have any access to or knowledge of any area underneath your home, chances are it’s built slab-on-grade. You can also look for the concrete around the bottom edge of your structure; if it’s just a few inches tall, it’s likely a slab. If it’s more than that, has any windows, or you have steps leading to your main entrance, you likely have a different foundation style.

Addressing gaps and cracks reduces heat loss and improves energy use.

Most single-story homes don't have foundations strong enough to support a second story, but they can be reinforced for an addition. A structural engineer can assess your foundation and what needs to be done to get it ready. They'll look at any cracks or unevenness in your current foundation and consider any special framing or beams your home needs, especially if it’s in a high-wind or hurricane area.

“To support a second story, many structural engineers will require that you install additional concrete piers in the crawlspace,” says Tschudi. “This involves hand excavating, pouring a large concrete footing—usually with specially coated rebar—and then building concrete piers right up to the girders.”

New constructions need time to “settle” and sometimes, small hairline cracks occur as a result. Larger horizontal or “stair step” cracks, however, are usually a sign of a deeper, more severe issue. It could indicate an issue with the soil beneath the home, a problem caused by an overgrown tree, or another problem.

The Cornelius, OR homeowners’ guide to foundation repairs

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