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Find Concrete foundation repairers in Ontario

Avatar for Alpha Structural, Inc.
Alpha Structural, Inc.
4.8(
147
)

Serving Ontario, CA and surrounding areas

Approved (Corporate)

In business since 1992

Free estimates

Emergency services offered

"Erinn was my initial contact and he gave a very through and fair estimate. We had structural work done to support floor joists and large beams under the garage that needed replacing. Ernesto and his team, Julio, Salvatore and Gilder worked tirelessly to complete the work and were respectful, punctual, informative and good humoured throughout the entire process. I would not hesitate to use them again or recommend them to others. A really great company!!"
Basement Addition
Basement Expansion
Caisson Supported Retaining Wall
Cantilevered Deck Design Build
Deck Expansion and Slope Failure with Retaining Wall

+315

Response time10 hrs
Response rate96%
35 neighbors recently requested a quote
Avatar for Just Stamping Concrete
Just Stamping Concrete
5.0(
17
)

Serving Ontario, CA and surrounding areas

Approved

In business since 2007

Free estimates

Credit card accepted

"I recently had the pleasure of working with Just Stamping Concrete for a landscape design project, and I cannot recommend them enough! They are a true gem in the industry, and their work speaks for itself."
Concrete
Response time2 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Groundworks
Groundworks
4.4(
124
)

Serving Ontario, CA and surrounding areas

Approved (Corporate)

In business since 1995

Free estimates

Warranties offered

"Bob Warren was simply terrific, i had a great experience consulting on my crawl space. Really, Ive never had a crawl space and while having one in my first home i did not know what to look for that was in need of repair. Bob did a thorough job looking over it for me and very honestly delivered me feedback. Turns out i am not in a dire need of repairs but when i do, i know who to turn to. Thank you Bob, and GroundWorks for the professionalism "
Foundation
Foundation
Foundation
Concrete
Concrete

+16

Response time11 hrs
66 neighbors recently requested a quote
Recommended by38%of homeowners
Avatar for HIC Builders, Inc.
HIC Builders, Inc.
5.0(
11
)

Serving Ontario, CA and surrounding areas

Approved

In business since 2017

Free estimates

Warranties offered

"I'm grateful for the remarkable transformation of my previously awkward 2 bed/1 bath into a fully functional 2 bed/2 bath plus office. After interviewing several companies, I chose HIC Construction because Idan was open-minded, thoughtful, and had good ideas for my first renovation project. Choosing a contractor is like a marriage, and Avi delivered on what was promised, mostly within the expected timeframe. We rearranged plumbing, added a subpanel for a larger kitchen, replaced ducts, added a new furnace, and created two new bathrooms. I appreciate project manager Avi for navigating project issues and assisting in design and investment decisions. I look forward to witnessing your company's continued success."
Roof & exterior paint
Working on the gas line
Artificial turf project
Roof & exterior paint
Roof & exterior paint

+53

Response time2 days
Response rate98%
39 neighbors recently requested a quote
Avatar for Dalinghaus Construction, Inc.
Dalinghaus Construction, Inc.
4.6(
32
)

Serving Ontario, CA and surrounding areas

Approved

In business since 2000

Free estimates

Warranties offered

"We hired Dalinghaus for our earthquake retrofit on a raised foundation. The entire company was easy to work with: friendly, timely, clean, and conscientious. A special note during Pandemic: sales and crew all wore masks."
Harnessed up in La Jolla
Lifting Gap
Cracks On Door Frames
After lift on a home's foundation
Doorway crack

+178

Response time2 days
5 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Dalinghaus Construction, Inc
Dalinghaus Construction, Inc
4.4(
7
)

Serving Ontario, CA and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"I hired Dalinghaus Construction to install two push Piers for a freestanding column/wall (bad clay soil causing movement). I meet with Kevin to go over the scope of work and he explained everything in detail. The price was the best I can find. Took one extra day to finish the work, but they did not charge me any additional fees. 3 month later, I had a feeling that the column/wall is moving again and call Kevin. He show up in a few days and show me there is no way that wall is still moving and he was right. They are very good at what they do and customer service is the best. Thank you very much."
Completed retaining wall repairs with helical tiebacks
Lifting a San Clemente hillside home that had settled or sunk 16 inches
Team work makes the dream work in foundation repairs!
Foundation repair in Avalon on Catalina Island
Foundation repair project at hillside home in San Clemente overlooking the Shorecliffs Golf Club

+128

Response time4 days
27 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.3(
21
)

Serving Ontario, CA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: True professional

"Throughout our project, their general construction services were consistently professional and reliable. They managed every detail flawlessly, ensuring a smooth and efficient process from start to finish."
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.
.
.
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+1

Response time6 hrs
Recommended by28%of homeowners
RSF Construction Inc.
New to Angi

Serving Ontario, CA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

RSF Construction Inc. is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

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FAQs for concrete foundation repair projects in Ontario, CA

Visible cracks, water leaks, uneven floors, or walls that won’t line up are classic red flags. You might also notice sticking windows, doors that no longer latch, or exterior cracks crawling up brick or siding. Even a damp, musty basement can hint at trouble. If you spot any of these, call a foundation pro right away. Early inspections cost far less than waiting until the damage threatens your home’s stability.

Yes, foundation problems impact your home’s value. Buyers want proof that the foundation is stable, and a recent, professional repair can actually boost confidence in your home. You’ll need to disclose the work, but documentation showing the structure was properly stabilized, especially with piers in regions known for shifting soil, often reads as a plus, not a problem. Skipping repairs, on the other hand, can cut your sale price and shrink the pool of interested buyers. Taking care of the issue protects both value and peace of mind.

Foundations are engineered for exceptional longevity when constructed correctly and maintained diligently. Concrete slab foundations remain structurally sound for 200 years, while other foundation types deliver integrity between 75 and 100 years. Regular professional inspections and timely maintenance further secure a foundation’s lifespan and ensure your home stays safe over the long term.

The Ontario, CA homeowners’ guide to concrete foundation repairs

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