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  • Average homeowner rating star icon4.5
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  • Verified reviews icon108
    Verified foundation repairs reviews

Find Foundation repair specialists in Startup

Avatar for Wu Construction

Wu Construction

4.76(
186
)
Approved Pro

Wu Construction

4.76(
186
)
Approved Pro
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
43 years of experience

Wu Construction Inc, specializes in drainage and foundation systems construction and repair. Since our founding in 1983, we have successfully completed thousands of projects for homeowners and businesses throughout the Northwest. We are the best in our industry, and well regarded by our customers for our excellent service. We are lauded for our speedy responses to inquiries, our efficiency and the quality of our work.

"Great communication and thorough work. Would hire again."

Brian J on April 2025

Wu Construction Inc, specializes in drainage and foundation systems construction and repair. Since our founding in 1983, we have successfully completed thousands of projects for homeowners and businesses throughout the Northwest. We are the best in our industry, and well regarded by our customers for our excellent service. We are lauded for our speedy responses to inquiries, our efficiency and the quality of our work.

"Great communication and thorough work. Would hire again."

Brian J on April 2025


"Purchased a 1906 home in North Portland with an uneven foundation that had been patched for 60 years, but needed serious stabilization work. I contacted multiple foundation contractors in the greater-Portland area and Ram Jack was the only team that provided a full worse-case estimate that included everything that I may need to permanently stabilize the home's foundation. Other contractors' estimates were higher, omitted some of the features of Ram Jack's estimate, and involved greater excavation work around the home. While I was collecting estimates, I had multiple contractors check the levels on the house and could see the home was continuing to sink as much as half and inch in some areas within only a few months, so I knew I had to do something soon as the hotter summers are causing significant erosion to the clay soil in north portland. After paying the 50% down payment, I was quickly in touch with multiple project managers and structural engineers who were able to answer my questions as the work plan developed. I work from home and have two cats, so I was a bit worried about the noise and needing to leave at certain times during the work. Ramjack devised a plan of installing 12 helical piers from the basement and 2 outside for a small crawl space area as well as replacing most of the piers in the basement that had water damage. During the excavation and pier installation, I didn't have to leave my house at all, my cats were fine, none of the utilities ever needed to be turned off and none of the neighbors said they heard more than the hum of the generator outside; insane professionalism. The work team kept me informed at every step of the excavation and pier installation and was able to recover an inch of lift with only a few drywall cracks that I patched in a day. I could have gone further, but wanted to avoid any potential damage to the sewer pipes and stay within my budget. During the lifting, I was standing with the lead construction manager who kept me informed of every risk as we lifted the house bit by bit. During the excavation my basement looked insane with mounds of dirt everywhere, but the construction team cleaned everything flawlessly; all I had to do was a quick mop and the basement was good as new again. Overall had a great experience with RamJack; the 20 years in business shows, most everyone I dealt with had been working with them for years; the construction manager had been doing pier installation for 15 years. The work was expensive, but cheaper than the other local contractors, and certainly way cheaper than replacing the entire basement foundation. Ramjack was even able to take a few grand off the intitial worse-case estimate for solutions not needed. Glad I was able to repair my 120 year old home; here's to another 100 years. Big thanks to Pancho and Stephen, as well as the structural engineers and project managers; I'm very happy with the work."

Kevin S on March 2022

At Ram Jack West, we treat customers with respect and care. If you notice cracks, damages, or other issues with your foundation, our team is ready to help. We have innovative systems that have been refined over our 40+ years of experience.

"Purchased a 1906 home in North Portland with an uneven foundation that had been patched for 60 years, but needed serious stabilization work. I contacted multiple foundation contractors in the greater-Portland area and Ram Jack was the only team that provided a full worse-case estimate that included everything that I may need to permanently stabilize the home's foundation. Other contractors' estimates were higher, omitted some of the features of Ram Jack's estimate, and involved greater excavation work around the home. While I was collecting estimates, I had multiple contractors check the levels on the house and could see the home was continuing to sink as much as half and inch in some areas within only a few months, so I knew I had to do something soon as the hotter summers are causing significant erosion to the clay soil in north portland. After paying the 50% down payment, I was quickly in touch with multiple project managers and structural engineers who were able to answer my questions as the work plan developed. I work from home and have two cats, so I was a bit worried about the noise and needing to leave at certain times during the work. Ramjack devised a plan of installing 12 helical piers from the basement and 2 outside for a small crawl space area as well as replacing most of the piers in the basement that had water damage. During the excavation and pier installation, I didn't have to leave my house at all, my cats were fine, none of the utilities ever needed to be turned off and none of the neighbors said they heard more than the hum of the generator outside; insane professionalism. The work team kept me informed at every step of the excavation and pier installation and was able to recover an inch of lift with only a few drywall cracks that I patched in a day. I could have gone further, but wanted to avoid any potential damage to the sewer pipes and stay within my budget. During the lifting, I was standing with the lead construction manager who kept me informed of every risk as we lifted the house bit by bit. During the excavation my basement looked insane with mounds of dirt everywhere, but the construction team cleaned everything flawlessly; all I had to do was a quick mop and the basement was good as new again. Overall had a great experience with RamJack; the 20 years in business shows, most everyone I dealt with had been working with them for years; the construction manager had been doing pier installation for 15 years. The work was expensive, but cheaper than the other local contractors, and certainly way cheaper than replacing the entire basement foundation. Ramjack was even able to take a few grand off the intitial worse-case estimate for solutions not needed. Glad I was able to repair my 120 year old home; here's to another 100 years. Big thanks to Pancho and Stephen, as well as the structural engineers and project managers; I'm very happy with the work."

Kevin S on March 2022


"Very well. They worked diligently for two days to do the repair."

Bonnie L on October 2025

At Ram Jack West, we treat customers with respect and care. If you notice cracks, damages, or other issues with your foundation, our team is ready to help. We have innovative systems that have been refined over our 40+ years of experience.

"Very well. They worked diligently for two days to do the repair."

Bonnie L on October 2025


Avatar for Groundworks

Groundworks

4.56(
140
)
Approved Pro

Groundworks

4.56(
140
)
Approved Pro
Customers say: Quick response
29 years of experience
Free onsite estimate

Groundworks, formerly, Matvey Foundation Repair is the leading structural and concrete repair firm in Western Washington. We specialize in repairing residential and commercial foundations, concrete slabs, bowing/cracked basement walls, sinking floors, concrete porches, settling/cracked foundations, and other structural issues. We raise and level concrete pavements, driveways, and sidewalks. We also offer basement waterproofing. Our expert design technicians provide professional services for commercial, residential, industrial, government, and municipal applications with award-winning products and superior customer service. CALL US TODAY FOR A FREE ESTIMATE! GROUN**76305

"Very informative. Clear and concise. Gave us many options. Daniel is a wonderful and honest person and was so helpful with our questions. The crew lead by Anthony, with Jordan, Uriel, and Richard did professional work. The finished product is wonderful and can already feel the results in the house. Would 1000% recommend. Just keep in mind it is a very messy job. These guys do the best they can to keep it clean"

Charles W on May 2025

Groundworks, formerly, Matvey Foundation Repair is the leading structural and concrete repair firm in Western Washington. We specialize in repairing residential and commercial foundations, concrete slabs, bowing/cracked basement walls, sinking floors, concrete porches, settling/cracked foundations, and other structural issues. We raise and level concrete pavements, driveways, and sidewalks. We also offer basement waterproofing. Our expert design technicians provide professional services for commercial, residential, industrial, government, and municipal applications with award-winning products and superior customer service. CALL US TODAY FOR A FREE ESTIMATE! GROUN**76305

"Very informative. Clear and concise. Gave us many options. Daniel is a wonderful and honest person and was so helpful with our questions. The crew lead by Anthony, with Jordan, Uriel, and Richard did professional work. The finished product is wonderful and can already feel the results in the house. Would 1000% recommend. Just keep in mind it is a very messy job. These guys do the best they can to keep it clean"

Charles W on May 2025


Avatar for Groundworks

Groundworks

4.90(
21
)
Approved Pro

Groundworks

4.90(
21
)
Approved Pro
Customers say: True professional
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
20 years of experience

Since 1987, Groundworks has specialized in helping homeowners with their foundation repair, waterproofing, and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across North-West Washington. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your basement, foundation, or crawl space. GROUN**76305

"Excellent work by Wyatt, Tucker,Zane and Oliver. Finished a day ahead of schedule. Great communication and explanation of required work. Left with everything cleaned up as if they were never here."

William P on August 2025

Since 1987, Groundworks has specialized in helping homeowners with their foundation repair, waterproofing, and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across North-West Washington. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your basement, foundation, or crawl space. GROUN**76305

"Excellent work by Wyatt, Tucker,Zane and Oliver. Finished a day ahead of schedule. Great communication and explanation of required work. Left with everything cleaned up as if they were never here."

William P on August 2025


Avatar for Groundworks

Groundworks

4.72(
16
)
Approved Pro

Groundworks

4.72(
16
)
Approved Pro
Super Service Award
Customers say: True professional
20 years of experience
Free onsite estimate

Groundworks specializes in helping homeowners with their residential and commercial foundation repair, basement waterproofing and wall repair, and concrete repair needs. Our top priority is providing high-quality home repair solutions and personalized service across the northwest Washington area. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation.

"We're so impressed with this company and its technicians! Joe Jimenez was polite, professional, well-spoken and friendly. He explained everything beautifully and we were happy to have him in our home. "

Barbara E on October 2025

Groundworks specializes in helping homeowners with their residential and commercial foundation repair, basement waterproofing and wall repair, and concrete repair needs. Our top priority is providing high-quality home repair solutions and personalized service across the northwest Washington area. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation.

"We're so impressed with this company and its technicians! Joe Jimenez was polite, professional, well-spoken and friendly. He explained everything beautifully and we were happy to have him in our home. "

Barbara E on October 2025


Avatar for Iron Earth Construction LLC

Iron Earth Construction LLC

5.00(
3
)
Approved Pro

Iron Earth Construction LLC

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
5 years of experience

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our

"Very accommodating and great service and product"

sally k on September 2023

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our

"Very accommodating and great service and product"

sally k on September 2023


Avatar for Ram Jack West

Ram Jack West

4.25(
6
)
Approved Pro

Ram Jack West

4.25(
6
)
Approved Pro
Customers say: Terrific value
25 years of experience
Free onsite estimate

We're dedicated to providing our clients with the very best in foundation repair, house lifting, pile driving, drilling and a variety of other projects. With over 15 years of industry experience, we take an enormous amount of pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients and guarantee your satisfaction.

"The sales man offered me leveling and light of my foundation. The end result was my doors not being able to close, more cracking in my sheet rock on the walls and on the ceiling. The house is not level and now Iâ  m seeking options to fix this whole debacle. Ram Jack West is sales based, not service based. Please do research before you make a $30,000 to have hire a company to repair your foundation, working with them is one of my biggest lifetime regrets."

Steven R on September 2023

We're dedicated to providing our clients with the very best in foundation repair, house lifting, pile driving, drilling and a variety of other projects. With over 15 years of industry experience, we take an enormous amount of pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients and guarantee your satisfaction.

"The sales man offered me leveling and light of my foundation. The end result was my doors not being able to close, more cracking in my sheet rock on the walls and on the ceiling. The house is not level and now Iâ  m seeking options to fix this whole debacle. Ram Jack West is sales based, not service based. Please do research before you make a $30,000 to have hire a company to repair your foundation, working with them is one of my biggest lifetime regrets."

Steven R on September 2023


Avatar for Groundworks

Groundworks

New on AngiNew on Angi
Approved Pro

Groundworks

New on AngiNew on Angi
Approved Pro
26 years of experience
Free onsite estimate

Based in Phoenix, AZ, we specialize in foundation repair, basement waterproofing, concrete leveling, and crawl space repair. Serving Arizona, we deliver reliable solutions for businesses and commercial properties. Contact us today!

Based in Phoenix, AZ, we specialize in foundation repair, basement waterproofing, concrete leveling, and crawl space repair. Serving Arizona, we deliver reliable solutions for businesses and commercial properties. Contact us today!


Avatar for Strong Foundations Home Inspection

Strong Foundations Home Inspection

5.00(
44
)

Strong Foundations Home Inspection

5.00(
44
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Our mission is to provide peace of mind to the homeowner and home buyer; to leverage our experience and expertise in order to ensure that you know everything you need to know about your home. We excel in helping both experienced and first-time home buyers to understand their home better, and to feel comfortable with their surroundings. We will take the time needed to patiently walk a homeowner or buyer through each aspect of their home, from the foundation to the roof and everything in between to ensure familiarity and comfort with the structure and the systems. For the real estate agent, we understand how important it is to be honest and trustworthy, but never alarmist. It is not our job to create a sense of fear or to prevent the home from being purchased. Instead, it is our job to inform the client of the home's current condition, while providing practical advice on how to repair or maintain the home going forward. Making sure the customer feels comfortable with the home they are purchasing is the first step toward a successful transaction. We offer: FREE Thermal Imaging on all standard Home Inspections (most inspectors charge extra, if offered at all) FREE RecallCheks for appliances FREE Home Maintenance Manuals for all clients AND MORE!

"Isaac was thorough, and his report was exhaustive and complete. We are moving forward with a ton of confidence. He was timely, helpful, and friendly. He walked me through the whole house and showed me the issues and areas of concern along the way."

Jake S on September 2025

Our mission is to provide peace of mind to the homeowner and home buyer; to leverage our experience and expertise in order to ensure that you know everything you need to know about your home. We excel in helping both experienced and first-time home buyers to understand their home better, and to feel comfortable with their surroundings. We will take the time needed to patiently walk a homeowner or buyer through each aspect of their home, from the foundation to the roof and everything in between to ensure familiarity and comfort with the structure and the systems. For the real estate agent, we understand how important it is to be honest and trustworthy, but never alarmist. It is not our job to create a sense of fear or to prevent the home from being purchased. Instead, it is our job to inform the client of the home's current condition, while providing practical advice on how to repair or maintain the home going forward. Making sure the customer feels comfortable with the home they are purchasing is the first step toward a successful transaction. We offer: FREE Thermal Imaging on all standard Home Inspections (most inspectors charge extra, if offered at all) FREE RecallCheks for appliances FREE Home Maintenance Manuals for all clients AND MORE!

"Isaac was thorough, and his report was exhaustive and complete. We are moving forward with a ton of confidence. He was timely, helpful, and friendly. He walked me through the whole house and showed me the issues and areas of concern along the way."

Jake S on September 2025

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Foundation Repair questions, answered by experts

Yes, slab leaks are fairly common, especially in older homes and places that are prone to earthquakes which can move home foundations.

Most houses are expected to settle over time, but foundation sinking of more than a few inches or uneven sinking of more than an inch for every 20 feet is cause for concern. Any significant or uneven sinking should be assessed by a professional to determine the cause and perform any necessary repairs. 

Not all cracks in the basement floor signal foundation problems. As the house settles, you’ll notice very thin hairline cracks, which you don’t need to worry about. Cracks that are 1/8 inch or wider should require sealing, while ones that are 1/2 inch or wider require leveling. However, if you have cracks in your basement floor with heaving, you should call a pro to assess the situation. Heaving can lead to uneven flooring, structural issues, and foundation problems.

Yes, all basement floors crack in response to the natural settlement of the soil around them and from concrete shrinkage as it cures, and you’ll see hairline cracks as a result. However, you should keep an eye on your basement floor to see if cracks continue to lengthen or widen or show signs of water intrusion. In any of these cases, the problem is likely not settling or shrinkage, and a professional repair is necessary.

Underpinning a foundation is when a contractor installs deep piers under your foundation to provide support. Professionals often use this foundation repair method when the soil underneath the foundation is no longer strong enough to support the house evenly. Underpinning a foundation often comes with other repairs to tackle the source of the problem. For example, a contractor may regrade your yard around your home’s foundation to make sure water drains away from your house.

The Startup, WA homeowners’ guide to foundation repairs

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

What do you need done? We’ll find top pros.
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