Sinai Construction is Southern California's oldest and most reputable foundation contractor with over 32 years' experience in foundation repair, seismic retrofitting, basement waterproofing, yard drainage, hillside foundation construction, slope repair, and other structural and concrete work. We have a General Engineering Contractor license and a General Contractor license. We are a member of the ICRI, and we are an A+ rated member of the Better Business Bureau. We are also the recipient of the Talk of the Town Award and the 2011 Angie's List Super Service Awards. Financing: No payments and no interest for 6 months on approved credit • 100% unsecured financing from $4,000 to $45,000 on approved credit • A quick, easy, and safe toll-free loan-by-phone application process • A fast credit decision in about 10 minutes • No paperwork
Business highlights
41 years of trusted experience
Services we offer
Foundation Repair and Replacement, Hillside Foundation Repair and Construction, Seismic / Earthquake Retrofit, Soft Story Retrofit, Foundation Bolting, Cripple Wall Bracing, Shear Transfer Tie Installation, Floor Leveling, Retaining Walls Construction, Slope Failure Repair and Stabilization, Foundation, Basement and Yard Drainage, Foundation and Basement Waterproofing / Damp Proofing, Concrete Crack Repair and General Concrete Work
We did not need their services after all because our home purchase fell through.
Description of Work: Estimate on EQ retrofitting
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Kristen W.
08/2016
2.0
foundation repair
+ -1 more
Extremely difficult to obtain a bid. It takes about a week for someone to come out to inspect. After the inspection, I discussed scope of work with the inspector. I waited for the bid for about three weeks, then finally called the office on a Thursday to follow up and they said that I would have the bid by Monday. I called back Monday afternoon to inquire on status and was told that no work was needed. This feedback is contrary to what was discussed with the inspector. All in all, I was very disappointed that the company was not able to provide a bid.
Description of Work: Foundation Repair
Rating Category
Rating out of 5
Barbara S.
05/2016
2.0
foundation repair
+ -1 more
Very non responsive and didn't have the courtesy to call me back after calling 4 times. I merely wanted to set up an appointment to have someone come out and look at the job site to give us a bid.
Description of Work: I called ths contractor 4 times to try and set up an appointment to get a bid and all 4 times I was assured that someone would call me back and no one ever did. I did get one call back to let me know the owner would call me back before the end of day, which never happened. I don't feel that I should have to call a vendor 4 times just to try to set up an appointment. Perhaps they do good work, but I'll never know..... If this is any indication of how they run their business then I'll never use this vendor ever. Very disappointing, it's not very hard to have the courtesy to call someone back.....
Rating Category
Rating out of 5
responsiveness
2.0
punctuality
2.0
Samuel L.
10/2015
4.0
foundation repair
+ -1 more
There were no additional charges. It was alright. They were fine. They took like a week or a week and a half to get the whole estimate and quote back to me. I'm not going to use them. They're too expensive. The worker was great.
Description of Work: I purchased a big deal from them for $125. They did an inspection and gave me a quote.
Rating Category
Rating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
4.0
punctuality
4.0
$125
Abby L.
10/2015
5.0
concrete driveways, concrete repair, drain pipe, foundation repair
+ 2 more
They are polite, professional and prompt. They communicated all the way through, handled the permits properly, and did a fantastic job. They even went above and beyond by cleaning up broken glass under the house (purchased the house and not sure how it go there) and fixed a few other odds and ends they noticed around the house. I was so happy with the job they did.
Description of Work: They fixed foundation, retrofitted house, added drainage creating a flow from roof gutters, to downspouts, to in ground drainage all the way to the street. They poured new concrete patio which included making the water flow properly in the event of rain. They graded the land for proper water flow, away from the foundation. They corrected some problems with my roof rafters. They shored up a deck bringing it up to code. They also poured a new concrete section in my driveway, and poured a nice concrete trash area on the side yard.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$20,000
James Y.
06/2015
5.0
foundation repair
+ -1 more
they were very thorough, professional and knowledgeable. gary spent a lot of time with us giving us all kinds of advice and options. in the end, we had more of a drainage problem than a foundation problem and found another solution based on recommendations from a soils engineer that gary recommended.
Description of Work: sinai came and did an evaluation of our foundation and gave a recommendation and estimates. they also had a structural engineer come out to evaluate our house.
Rating Category
Rating out of 5
quality
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Response from Sinai Construction
Hi {Member's name removed}, This was a nice surprise! I am glad that I was of help to you and I wish you all the best. Gary
Robert G.
06/2015
5.0
excavators, foundation repair
+ 0 more
After shopping around for a vendor to address our drainage problems we selected Sinai. They appeared to be very knowledgeable about our drainage issue and provided a very reasonable proposal to address the problems The problem required digging on the side and back of the garage. The only access to the back of the garage was through by neighbors property . I was therefore very concerned not only about the quality of the final job but the cleanliness during the project. It took the team about 5 days . The team assigned was very professional. They had a good handle on what needed to be done and cleaned up thourougly after each day. The final work was excellent and actually exceeded my expectations . I would definitely recommend Sinai Construction.
Description of Work: The provider corrected a drainage issue around our detached garage. Water was seeping into our garage creating a black mold.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$6,000
ALLISON C.
06/2015
5.0
foundation repair
+ -1 more
The inspector arrived on time and spent a LONG time crawling around under the house taking lots of pictures, inspecting things, etc. Took these back to the experts (his bosses) at Sinai and they provided an estimate and a full report in a timely fashion (within a couple of days). This was very helpful as I was then able to request a credit from the seller on the transaction.
Description of Work: With an Angie's list special, provided an inspection and report on necessary foundation repairs for purposes of a property in escrow.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$125
Vincent C.
05/2015
4.0
foundation repair
+ -1 more
It went okay. The pricing is a bit high but if they get their pricing in order, I will use them again.
Description of Work: I purchased a big deal for Sinai Construction.
Rating Category
Rating out of 5
Yes, I recommend this pro
$125
Krista H.
04/2015
5.0
foundation repair
+ -1 more
The estimate was very thorough and every question I asked I was provided an in depth explanation. Their bid came in higher then others, but I really appreciated them taking the time to explain why they recommended certain work vs. the other solutions. They also back up their work with a 25 yr warranty. Throughout the whole process EJ was very responsive over email and anything that came up a representative from the office would come to site to check on the work. The men doing the work were always on site before starting time and worked hard. Carlos was very easy to talk to and made it a comfortable situation considering it was three + weeks with them directly underneath your feet, our house on stilts and not much space to work with. They were all very nice guys. All the work passed inspection. Towards the end I think the pressure to finish was on and there were some hiccups in the quality of the finished project, but EJ took good care of us and made sure everything was to our satisfaction in the end. I am very happy with the work and would highly recommend them to anyone who needs to get foundation work done.
Description of Work: Full foundation replacement, bolt and brace foundation and install sump pump in driveway for drainage.
Rating Category
Rating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$26,000
Robert P.
02/2015
5.0
foundation repair
+ -1 more
The provider arrived on time as promised. He was professional and answered my questions as they arose. The report was detailed and included quality pictures of any damage. Their recommendations were included. After receiving the report, I had additional questions, they took the time to answer all of my questions.
Description of Work: Escrow inspection of house foundation
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
4.0
punctuality
5.0
Yes, I recommend this pro
$125
Response from Sinai Construction
Dear (removed members name) Thank you for your kind words about being courteous. I must correct the record, First - I gave a range in price; low - $35,000 and high - $70,000) including engineering and permits to construct a 6 foot tall by 60 feet long retaining wall. No Estimate or proposal was given, only a “ball park” before any plans, engineering, or permits. Second – the $15,000 estimate the contractor’s gave you has to be for the 4’ tall wall you initially mentioned at the meeting. There is no way a reputable contractor can construct an engineered wall 6’ tall by 60 feet long for $15,000. The permits alone will be in excess of $10,000. Some contractors are willing to build unpermitted retaining walls. If you hire them you are at risk of the wall not being built properly. Additionally, if the city is notified they will issue a Stop Notice and an Order to Correct. We recommend you hire a reputable geotechnical engineer and/or structural engineer to provide initial consultation. This will ensure you have all the correct information. Sinai Construction, Inc. has in business 30 years and has constructed permitted retaining walls all over Southern California. We understand the process and the costs to properly construct walls. We hope you make the informed decision. We are available if you have any additional questions whether or not you choose to hire us. We are here to help. Thank you again for your feedback. Honest input is always helpful and appreciated. Chris Bahr
armine K.
01/2015
4.0
foundation repair
+ -1 more
It went well. I just could not use their service. I had interacted with 3 other companies on the same project. The other 3assessed the project similarly and estimated the cost of the project around 15000 while Sinai construction estimated it roughly at 70000. Significant difference. The cost being 3-4 x more.
Description of Work: Called this company for an estimate to build a retaining wall. My overall interaction with them was very positive. Very courteous prompt response and punctual. All of this seems very rare based on my interactions with many construction based companies. Chris arrived as arranged and we discussed the retaining wall and what it would intail. He shared his knowledge.
Rating Category
Rating out of 5
value
1.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
$70,000
Mat K.
11/2014
5.0
foundation repair
+ -1 more
We agreed to a start date, and the Sinai crew arrived promptly on that day. Most of the work was completed more than a day earlier than predicted. Workers were polite and helpful. The only minor problem encountered was the accidental disconnection of an old phone line running through the crawl space. This was very promptly repaired. Clean up was thorough. The work generated more dust in our backyard then I expected, but this was easily taken care of. I've just received photos of the repair work. It looks very impressive to my untrained eye. I don't think we could have had or expected a better experience.
Description of Work: Sinai completed repairs and improvements to make our home more earthquake resistant. After an evaluation of our foundation, Sinai submitted a very thorough proposal that included photos. The company's representative also answered my questions about details of the proposed repairs, including the importance of fixing several large cracks.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$5,040
Dolores P.
11/2014
5.0
concrete driveways
+ -1 more
They did a really great job for us!
Description of Work: They did foundation and concrete work.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Marjorie P.
10/2014
5.0
foundation repair
+ -1 more
I am selling my house and needed to fix the foundation as it was sagging in one of my rooms. I contacted E.J. and he came to the house and explained the entire process. He was very friendly, knowledgeable and professional and answered all of my questions and concerns. I received the quote when they said I would and found the price to be reasonable. They did not try to up sell me which I appreciated. The crew was also professional and clean. They cleaned up around the house daily, I had no problems. The floor feels solid now and no longer squeaks! I am very happy with the work performed and the experience with E.J. and his crew was very smooth and stress free. I will definitely recommend them to anyone who needs foundation work.
Description of Work: Raised the foundation and built posts and pillars under the house.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$7,000
Diane R. J.
10/2014
5.0
foundation repair
+ -1 more
They were fabulous. They spent 45 minutes under the house, documented with pictures, and were very thorough. They were too much for us. It would be a great tool if you were in escrow and I would recommend them to anyone buying a house.
Description of Work: They gave us an estimate to raise our foundation.
Rating Category
Rating out of 5
quality
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Ryan H.
06/2014
5.0
foundation repair
+ -1 more
Sinai Construction exceeded my expectations on every level. It all started one year ago when we purchased a home that was sliding down a hill. We went into the deal knowing that there was major foundation work to be done. The original foundation inspector (Chon Aragon) was extremely thorough and patient as he examined the house. (Being new to this, we had also had other inspections/proposals from other highly rated Angie's List foundation specialists.) After Chon's thorough inspection he explained some fundamental concerns to us. His initial inspection/evaluation set him apart from the rest. Eventually we met with Gary Sinai, who came to meet us fully prepared, beyond what any of the other contractors did. Gary is intelligent, practical, calm and confident - which is the combination of traits we needed going into such an unknown area. Gary was proactive throughout the process and his entire team of workers were most professional. They explained the process, kept the work site very clean and impressed the city inspector on every level. I communicated with the city inspector who told me that he is very familiar with Sinai Construction and knows the high level of integrity they possess. The foundation project for our hillside home and deck concluded and I never would have known about Sinai Construction if it wasn't for Angie's List. My experience with Sinai Construction was the most positive experience I have had with any contractor and I hope my review will help other home owners, investors, etc.
Description of Work: Replaced all foundation on the down slope side of house, also installed foundation/grade beams, etc. for large deck on down slope side of house.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$108,120
Jubin M.
04/2014
5.0
foundation repair
+ -1 more
Sinai Construction was the first company we interviewed to do our foundation work. After our initial meeting with Sinai, we looked into three or four other reputable companies. Sinai was head-and-shoulders above the rest in terms of professionalism and service. Gary Sinai, the founder and president, met with us personally and answered all of our questions patiently. Because we are on a tight budget, Sinai worked with us to make sure we were doing only the work that was absolutely necessary. Throughout the process, Gary Sinai and his team were very reasonable, responsible, and responsive. We agreed on a timeline and budget in advance of the work and Sinai stuck to it without diverging. Once they started the work, they were out there every day from 8 am to 4:30 pm until the project was finished. Also, even after they were paid-in-full, Sinai continued to be responsive and answer various questions I had about the work they did. I am truly grateful to Gary Sinai and his team for providing us with the highest level of service and for giving us a thoroughly positive experience.
Description of Work: Significant repair and replacement of my foundation.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$18,000
Gary S.
03/2014
5.0
basement waterproofing, foundation repair
+ 0 more
The Sinai Crew showed up on time each day. I went over their work schedule with the Job Foreman and went over my concerns and all proceeded well. We have a 60 some year old home and some of the wiring was disturbed during their work. We would let them know we had lost power to some wall plugs and the next day they were repaired. This was no fault of theirs and they were great about taking the time to fix any and all issues we had. Any mess that was created was cleaned up at the completion of the job. About a week after the completion, we received another email with the upgrade pictures and the signed final inspection. Within a few weeks of this work, Los Angeles experienced two good sized earthquakes. Needless to say, we felt very secure knowing this work had been done!
Description of Work: We wanted the foundation/subfloor of our home inspected. We were also interested in siesmic upgrades. The inspection was scheduled and they showed up on time. A few days later, we were emailed an estimate with pictures. We had cracked floor beams and bad footings. Our home did not have an outside crawl space to enter the subfloor - there was a 'trap door' in one of the closets. Sinai recommended cutting a crawl space from the North side of our home. We accepted the quote and the work was scheduled.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$6,500
CATHERINE M.
02/2014
5.0
foundation repair
+ -1 more
these guys were professional from the start. they arrived on time and gave a timely and detailed written bid for the work a few days later. sadly we could not use them (or anyone) as the driver who caused the damage to our wall was underinsured and we were not willing to spend the time away from work to go to court over it to get a suitable amount to repair the issue. given my interactions with these guys in person and via phone I would call them back in a heartbeat for a similar repair or recommend them to friends. Of the three bids we got they were right in the middle and had the most comprehensive details of what they would and would not do. Very clear and very honest.
Description of Work: give bid
Rating Category
Rating out of 5
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$7
Adam L.
02/2014
5.0
foundation repair
+ -1 more
I didn't end up using these guys but wanted to commend George on his professionalism. George and his crew came and did a thorough inspection. Initially what George said on-sight was different than what his company later proposed (by quite a lot of money). I asked him why the discrepancy and he offered to come back out on his own accord and explain it and walk us through it. He went above and beyond and was very helpful and professional. I would highly recommend getting a quote from these guys. I went with another company, because George's boss (who I did not meet or talk to) gave me an "all or nothing" quote, and I didn't want to do "all" so it ended up being nothing.
Description of Work: Estimate
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
K C.
02/2014
5.0
basement waterproofing
+ -1 more
We are in the process of buying a home in a hillside and there is evidence of water intrusion seeping through the walls of the garage. Garry's guys came to inspect a garage, take photos and determine the cause of the water problem. Two of Garry Sinai's guys arrived promptly and spent more than an hour taking photos, crawling through the basement, attic and the overgrown side yard to test the drains to determine the cause of the water intrusion into the garage. They tested patio drains by using a hose and running water through the drains. They discovered that one drain was broken. During testing, water drained down the walls of the garage and not into the street like it should have. They also checked to see if water drained near the foundation. They promised me an estimate within a few days via e-mail, which promptly arrived. I asked many questions and they tried their best to answer them without talking down to me. All-in-all. I was very impressed by their polite attitude and level of professionalism.
Description of Work: They came to eatimate and provde recommendations for mitigating water intrusion that is leeching into a garage which is built into a hillside
Rating Category
Rating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$7,800
Edison K.
12/2013
5.0
foundation repair
+ -1 more
The initial reason why I called Sinai construction first was because I found they were the only ones that seemed to back their work with a 25 year warranty. I was able to speak with Gary Sinai who appears to be the owner of this establishment himself. After explaining the situation and the condition of the home, Gary provided very detailed and useful insight based on his experience on why this condition happened and what the possible remediation activities would be and what to look for as well. He could have easily charged the $150 inspection fee(for homes in escrow) and deliver the same message but seemed more concerned about the bigger problem at hand and steering me in the right direction rather then being opportunistic. Even though I may not need his services because I will most likely walk away from the deal, if I or anyone I know is need of Sinai construction services I will definitely advise they talk to Gary or his team first before selecting anyone else to perform the job to get an honest assessment of what is needed.
Description of Work: I was in escrow on a purchase of a home and had some concerns on the second floor being uneven.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Robert S.
11/2013
5.0
concrete repair, foundation repair
+ 0 more
When I first scheduled them to do the job I misunderstood what the scope of work was to be. It was totally my fault, but I was still concerned that what they had proposed would not fully solve my problem. After some brainstorming with George and the owner of the company, we came up with a solution that cost me a bit more, but we believed would adequately solve my problem. The work was done in the time frame it was promised and the workers were courteous and professional. After the job was complete, both George and the owner reached out to me to make sure I was satisfied. I appreciated their concern and told them that, while I was happy up to this point, I wouldn't really know if what they did worked, until we had a good rain. The owner then contacted me and said he would come back out at no charge if I did have any more leaks. As a business owner myself I really appreciate accountability and Sinai Construction seems to understand that.
Description of Work: Fixed a leak in my garage.
Rating Category
Rating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$2,370
Tony B.
11/2013
5.0
excavators, foundation repair
+ 0 more
I wanted to get Gary's opinion on possibly taking over a job that had been started by another contractor involving waterproofing. He responded to my e-mail immediately with a phone call and explained to me in great detail what was involved in the job and how it should be completed properly. Eventually, we worked out the issues with the contractor that was being used, but I really appreciated Gary's willingness to explain in great detail what was being done. If things had not worked out with the existing contractor, I would have definitely wanted to get a bid from Gary for the work!
Description of Work: I spoke to Gary Sinai about an issue we were having with a water proofing contractor who had started a job on a neighbor's home.
All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our State Contractor License Requirements page.
*Contact business to see additional licenses.
Service Categories
Foundation Repair,
Earthquake Retrofitting,
Basement Waterproofing,
Drain Pipe Installation,
Concrete Pouring and Repair,
Kitchen and Bath Remodeling,
Excavating,
Concrete Driveways,
Fountains,
Concrete Leveling
FAQ
Sinai Construction is currently rated 4.9 overall out of 5.
Monday: 8:00 AM - 5:00 PM
Tuesday: 8:00 AM - 5:00 PM
Wednesday: 8:00 AM - 5:00 PM
Thursday: 8:00 AM - 5:00 PM
Friday: 8:00 AM - 5:00 PM
Sinai Construction accepts the following forms of payment: Check,Financing Available,MasterCard,Visa
Yes, Sinai Construction offers free project estimates.
No, Sinai Construction does not offer eco-friendly accreditations.
No, Sinai Construction does not offer a senior discount.
No, Sinai Construction does not offer emergency services.
Yes, Sinai Construction offers warranties.
Sinai Construction offers the following services: Foundation Repair and Replacement, Hillside Foundation Repair and Construction, Seismic / Earthquake Retrofit, Soft Story Retrofit, Foundation Bolting, Cripple Wall Bracing, Shear Transfer Tie Installation, Floor Leveling, Retaining Walls Construction, Slope Failure Repair and Stabilization, Foundation, Basement and Yard Drainage, Foundation and Basement Waterproofing / Damp Proofing, Concrete Crack Repair and General Concrete Work