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TRUSTED BY ALTADENA, CA HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon51
    Verified foundation repairs reviews

Top-Rated Foundation repair specialists in Altadena - Updated Nov 2026

Avatar for The Foundation Works
The Foundation Works
4.9(
216
)
Concrete Foundation - RepairConcrete Foundation - Raise

Serving Altadena, CA and surrounding areas

Approved

In business since 2003

Free estimates

Warranties offered

"From start to finish our experience with Foundation Works was top notch. We did contract them to bolt the foundation on our 1921 Spanish Bungalow home and repair some minor foundation cracks in a 1950's addition. Prior to calling Foundation Works we had two other estimates for work, one was in line with the quote provided by Foundation Works and one was higher with a few additions to the work. So I would say their price was in parity with others. Myron did our initial inspection and spent a lot of time crawling around under our home and doing a very detailed inspection. He spent a long time sitting with us afterwards discussing what he discovered and what he recommended. He was very patient with our many questions. When we tried to add some additional work reinforcing what looked like some long term slippage on the peers under the house he carefully informed us of the history of how houses like ours were built and why we did not need to spend more money doing this repair as it wasn't slippage but rather just how it was built. Once we accepted the bid FW was able to start work quickly. They worked cleanly and while they don't clean up every day before going home they also don't leave a bad mess and the work was all in the backyard so a few piles of tools was not a big deal at all and was painless. The team that did our work was professional, friendly, and efficient. When we had questions they were always there to answer. When we had one (very small) issue related to the nails originally used in the 1920s to hold the corner floorboards in which had jumped up a bit due to the installation of blocks needed to support the bolting in a few places, they stopped work, immediately fixed the issue and adjusted how they worked so it didn't happen again. When the work was done you wouldn't even have known they were here. The yard and all entry points to the crawl space were spotless. The Burbank city inspection was a few days later, they handled it completely and we never needed to worry about a thing until they handed us approvals. The back office and payment process was professional, pleasant, and very low touch. I can't recommend this company more highly."
Additional Photos
Additional Photos
Additional Photos
Response time1 day
Response rate100%
10 neighbors recently requested a quote
Avatar for Alpha Structural, Inc.
Alpha Structural, Inc.
4.6(
241
)
Concrete Foundation - RepairFoundation, Basement or Crawlspace - Waterproofing / EncapsulationConcrete Foundation - Raise+1 more

Serving Altadena, 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

+323

Response time10 hrs
Response rate100%
10 neighbors recently requested a quote
Avatar for MVP Remodeling
MVP Remodeling
5.0(
48
)
Concrete Foundation - Repair

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Free estimates

Warranties offered

"If you are looking for a company that actually answers the phone, shows up on time, and does the job as promised, give these guys a call. MVP Remodeling is without a doubt one of the best contractors in Los Angeles. Josef had our home painted (interior and exterior), Repair foundation, window, replacement, and Solar installed! Highly recommend"
Pavers and Hardscaping Project
Roofing Project
Landscaping Project
Earthquake Retrofitting Project
Foundation Repair Project

+175

2 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Golden Retrofit
Golden Retrofit
5.0(
92
)
Concrete Foundation - RaiseConcrete Foundation - Repair

Serving Altadena, CA and surrounding areas

Approved

In business since 2016

Free estimates

Warranties offered

"I am very pleased with golden retrofit and foundation repairs work. Tom did a great job working through the process with us. They repaired our foundation within 4 days and the work passed inspection on first try. Thanks golden!"
Earthquake Retrofit with Cripple wall
Earthquake Retrofit with Cripple wall
Earthquake Retrofit witjh Cripple wall
Earthquake Retrofit with Cripple wall
Earthquake Retrofit with Cripple wall

+27

Response time6 hrs
Response rate98%
25 neighbors recently requested a quote
Avatar for Paramount Pavers & Construction
Paramount Pavers & Construction
4.9(
225
)
Poured Concrete Wall - Repair

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2001

Free estimates

Warranties offered

"This company is amazing. from workmanship,knowledge,friendly and efficiency ! they cleaned up as no one was ever here! my husband and i are so satisfied with the block wall and pavers would HIGHLY recommend there services."
Remodeling - General Project
Pavers and pool coping
Hardscape and remodeling
Remodeling - General Project
Excavated and removed old deck and installed traditional gray pavers. By Belgard.

+59

Response time10 hrs
11 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Doheny Concrete Construction, Inc.
Doheny Concrete Construction, Inc.
4.8(
44
)
Concrete Foundation - RepairConcrete Foundation - Raise

Serving Altadena, CA and surrounding areas

Approved

In business since 2007

Free estimates

Offers commercial services

"I got three quotes from recommended and well-established foundation reconstruction firms. They all did an onsite assessment and submitted proposals. I hired a civil engineer to evaluate those proposals for me, after he also inspected my home himself. He recommended Shay Aboav and Doheny concrete Construction above the others, and he also interviewed Mr. Aboav to doublecheck on details of the proposal. DOHENY'S PROPOSAL WAS SUBSTANTIALLY LESS MONEY THAN THE OTHER TWO. The work was completed on schedule, documented fully, and executed very nicely. It seemed quite complex to me. Cleanup was prompt and thorough. Customer service, outstanding."
Response time9 hrs
Response rate93%
12 neighbors recently requested a quote
Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.7(
42
)
Concrete Foundation - RaiseConcrete Foundation - Repair

Serving Altadena, CA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: True professional

"Our kitchen remodel with McCormick Home Builders went beyond our expectations. Leoni and her team took the time to understand exactly what we wanted. The open layout design changed the way we use the space, and it’s been perfect for family gatherings. They were prompt, courteous, and genuinely invested in making sure we were happy. Really impressed!"
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+1

Response time6 hrs
Recommended by17%of homeowners
Avatar for Just Stamping Concrete
Just Stamping Concrete
5.0(
28
)
Concrete Foundation - RaiseConcrete Foundation - RepairPoured Concrete Wall - Repair

Serving Altadena, CA and surrounding areas

Approved

In business since 2007

Free estimates

Credit card accepted

With over three decades of experience Just Stamping Concrete, Inc are second generation contractors that will work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions and thank you for your interest.

Concrete
Response time2 hrs
Response rate100%
3 neighbors recently requested a quote
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Foundation Repair FAQs, answered by experts

Most of the time, normal foundation settling will present as thin cracks in the foundation and minor creaks in the floorboards. In contrast, you can identify foundation issues by wide or uneven foundation cracks, horizontal or step-shaped gaps on the foundation wall, or cracks that go around corners of your foundation. Foundation problems can also cause changes in your living area, like increased humidity, uneven or sloping floors, nail pops in drywall, countertops pulling away from the wall, and windows and doors getting stuck. When in doubt, call in a professional to identify the underlying cause.

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, a house can collapse from severe foundation problems if they are left unchecked. However, this is a rare occurrence that typically takes many years to develop, and a partial collapse is more likely than a full one. Homes on hillsides or in areas with frequent washouts are at a higher risk. Barring a natural disaster or other extreme circumstances, clear signs of major issues will be apparent long before a collapse is imminent. It is crucial to conduct routine foundation inspections and address any problem, no matter how minor it seems, as soon as possible to avoid threatening the structural integrity of your home.

You can use a level or straight-edge to test for plumb foundation walls and a level slab, a level or a ball to check for sloping floors inside your home, and a hygrometer to look for moisture in your underhome area. Aside from these DIY tests, it’s important to get a foundation repair specialist or structural engineer to test the foundation to see if it’s supporting your structure properly. They can determine if the loads on the concrete are uneven or need reinforcement.

Many horizontal cracks in home foundations result from water and soil pressure from outside of the building or from a footing that is shifting. Under those circumstances, horizontal cracks are a structural problem that requires repair before they become worse and more difficult to fix. However, in very specific cases, thin horizontal cracks may simply be a cosmetic blemish due to concrete shrinkage.

The Altadena, CA homeowners’ guide to foundation repairs

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