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Sinai Engineering Contractor Soft Story Retrofit and Foundation Repair Los Angeles

Sinai Engineering Contractor (better known as Sinai Construction), is the most reputable and most experienced foundation repair company in Los Angeles with over 30 years' experience in foundation repair and other structural and concrete work. Our main foundation services include:


Sinai Engineering Contractor has a General Engineering Contractor license and a General Contractor license. We are a member of the International Concrete Repair Institute (ICRI), and we are a recipient of the 2014 Talk of the Town Award (also in 2012 and 2011) and the 2014 Angie's List Super Service Award (also in 2013, 2012, and 2011).

  • Foundation wall crack

    Cracks on walls? Sloping floors? Misaligned doors? These could be signs of serious foundation troubles.

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  • Damaged slope puts Los Angeles hillside home at risk of sliding off the hillside

    Soil falling off the slope and onto the street below? Your foundation could be exposed and damaged.

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  • Basement flooding or basement seepage

    Water pooling in your basement? Moisture could be eating away at your foundation.

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  • Soft story apartment building in Los Angeles needs soft story retrofit

    Tuck-under parking? Your apartment building could be at risk of collapsing during an earthquake.

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Sinai Engineering Contractor is also quite well known for providing some of the most thorough foundation inspections in Los Angeles. Our Los Angeles foundation inspection services include soft story inspection, general foundation inspection (for seismic retrofit, foundation repair, foundation replacement, and floor leveling purposes), retaining wall inspection, drainage inspection, waterproofing inspection, and slope repair inspection.

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Sinai Construction

d.b.a. Sinai Engineering Contractor

Los Angeles Foundation Repair Company

Toll-Free 1-888-BOLT-444
Phone (323) 655-0960
Fax (323) 852-1839

4489 West Pico Boulevard, Los Angeles, CA 90019 U.S.A.

  • Winner, 2014 Angie's List Super Service Award

    Winner, Angie's List
    Super Service Award 2014

  • Winner, 2013 Angie's List Super Service Award

    Winner, Angie's List
    Super Service Award 2013

  • Winner, 2012 Angie's List Super Service Award

    Winner, Angie's List
    Super Service Award 2012

  • Winner, 2011 Angie's List Super Service Award

    Winner, Angie's List
    Super Service Award 2011

  • Member, International Concrete Repair Institute

    Member, Int'l Concrete Repair Institute

  • Home Advisor Screened and Approved

    Screened and Approved by Home Advisor

  • Talk of the Town Award winner for Customer Satisfaction

    Winner, Customer Satisfaction Award
    2014, 2012, 2011

"Sinai Construction has literally saved our home and the homes of our two neighbors from sliding off a steep cliff. After interviewing 3 other companies we chose Sinai... Our structural engineer who is a UCLA professor was very complimentary upon the completion of work... on time and budget and without any corrections needed from him."

Sunny D., Malibu

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Why Choose Sinai Construction?

Truly the OLDEST foundation contractor — serving L.A. since 1984

We're not just saying that. It's true! Check out our California State License Number (457238) and you'll see that it's the oldest in structural and foundation repair.

FAST turnaround — report in 24 hours

For houses in escrow, we submit our inspection findings and proposal within 24 hours. If you're buying, that means you can decide faster. If you're selling, that means you can get things moving much quicker.

The REAL foundation specialist

We've been repairing foundations, retrofitting homes and solving drainage problems for decades. Foundations, structural work and drainage are ALL we do, and we are exceptionally good at it. We don’t cut any corners. We don’t take any shortcuts. We do it once, and we do it right.

SECURITY and peace of mind

Every one of our employees undergoes a thorough background check. Your family is safe with Sinai. When our clients leave their homes, they come home to find nothing missing, nothing out of place and a mess-free job site, as promised.


Ask around. Our satisfied clients always compliment us on our extraordinary service. It's for this reason that we are a recipient of the 2014 Angie's List Super Service Award (we've earned the award for 4 consecutive years now; we also received the Super Service Award in 2013, 2012, and 2011) and the 2014 Talk of the Town Award (we also got this award in 2012 & 2011).

We really do have an exceptional crew. They start on schedule and remain on schedule; they don't jump from project to project but see every project through to completion. They arrive on time, they're very polite and they work quietly — no cat-calls, wolf-whistles and loud music. They help with the traffic when they need to work on the street. Best of all — they do DAILY CLEAN UPS. Now that's the Sinai brand of service you won't get anywhere else.

QUALITY you can trust — GUARANTEED

The structures we lay down last, and they stand the test of time. We guarantee it. Our clients get a 25-year, transferable warranty on all structural work. This is a big plus if you decide to sell your house.

We have absolute confidence in the quality of our work. Our field personnel are foundation, retrofitting and drainage professionals. We have rigorous internal quality checks and every project undergoes periodic checks to ensure that plans are followed to the letter. We also thoroughly evaluate completed work to ensure that it is on a par with our high standards and that the foreman abided by our strict quality guidelines.

A FIRM PRICE — not a highly elastic price range

With Sinai Construction, there are no expensive surprises because our proposals contain precise pricing information. Isn't that preferable to getting a very low estimate initially then halting the project midway because costs that should have been anticipated are piling up so quickly?

Even in situations involving hillside properties where unknown variables could lead to changes in the scope of work, we still strive to give you a sense of just how much you may actually have to spend. We anticipate possible scenarios and approximate potential major expenses, so you are never caught unprepared.

The BEST VALUE for your money

We are one of the most affordable foundation contractors in Southern California, and we can prove it. Going line-by-line and item-by-item, compare our proposal to others you may have and you'll realize just how much value you're getting with Sinai.

When we meet to discuss our proposal, ask us to prove our claim and we'll gladly show you how you'll save more money by choosing Sinai Construction.

INTEGRITY you can count on

At Sinai Construction, we'll tell things as they are even if it's something you may not want to hear. If our report says the problem is serious, it is. If our report says the problem exists, it does. If our report says you can't do some repairs without doing some other repairs first, you can't. We don't sugarcoat things; we won't lie just so we can seem less expensive. Likewise, if your structure requires only minor work, or even no work at all, we'll tell you. You can count on it.

Yes, we might lose your business by doing this, but our strict code of ethics won't let us simply stand by while you waste good money on work you don't need or repairs that won't work or last.

Licensed, credentialed and MORE THAN QUALIFIED

Our experience and expertise are indisputable. We have a General Engineering Contractors License and a General Contractors License. We have a soils and structural engineer on our team.

We have worked on public works projects. We get called to work on extremely complex builds. When other construction professionals need a foundation contractor with extensive experience and highly specialized skills in structural and concrete work, they call us. Repairing crumbling hillside foundations, shoring up failing slopes, replacing entire perimeter sections, hand-digging 30-foot shafts in inaccessible sites — that's all in a day's work for us.

Learn more about Sinai Construction's credentials.