​I can't say enough good things about Mark! Finding someone who is both highly knowledgeable and genuinely friendly is a rare find these days. From start to finish, Mark made the entire process feel effortless. He clearly knows his stuff inside and out, but he explains things in a way that actually makes sense. Most importantly, I felt I could truly trust him with the job. If you're looking for top-tier service and a professional who actually cares, Mark is your guy. 5 stars all the way! read more

Mark came by and did an exemplary job explaining the settlement symptoms we'd been seeing (interior drywall cracks) and identified other issues we hadn't (unlevel floor, exterior cracks. He showed us pictures of what he found (in the sub floor and mapped it out in a diagram, which really helped to visualize things. Answered all our questions and gave us options for solutions. Also really appreciated that he kept the appointment even though he had been stuck in traffic coming from Modesto to South Bay in the afternoon and we had to go late. Thank you, Mark! read more

Bummed that I have to write this update, but the way our project has progressed has been disappointing. Work started earlier than expected and was effectively completed on time. Unfortunately, the plans submitted to the city needed to be revised after they began the work. The work has at my property has been finished for the better part of two months. Waiting for permit issues to get resolved is not uncommon, but the crew left the work site a complete mess, there are uncovered trenches around my entire property, and communication has been non-existent. read more

I had written a very disappointing review on Yelp which I agreed to take down and replace Upon Groundworks seeing the bad Yelp review they have been giving immediate attention. I was originally speaking with another project manager (who will remain unnamed) that was very unresponsive, never returned calls...did not care. Once they saw my bad review on Yelp Groundworks assigned a new project manager to my case, Joshua Hoaglund. Joshua immediately called me to gain an understanding of what was going on. After a brief explanation, he scheduled a team made up of Leonard Starks, Jesse Santana, and Andrew Gomez out to my residence the following Monday. The team came out and first discussed with me the method they would use to stop the water from perking up and ask if I had any special requests. They began by shrouded all the shelving and etc in our basement to protect it from all the dust. Once everything was covered they began to jackhammer the cracks to open them up to allow installation of the lateral gutter system which ties into the perimeter gutter. They worked tirelessly on getting the work completed in a very timely fashion. They had the concrete removed, gravel and gutter installed complete on the first day and came back the following day to pour the concrete. When they were finished they made certain the basement was cleaned up to my satisfaction. Fortunately it started raining shortly after they completed the work to test the work they performed. Thus far we have not observed any water perking up. I feel fairly confident they have solved the problem and should it begin to perk up water they will come back. I would like to thank Joshua Hoaglund for his understanding and quick response. I also want to give a special thanks to Leonard Starks, Jesse Santana and Andrew Gomez for all their hard work to complete the work quickly and deliver what was originally promised. read more

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My wife and I recently had work done on our house's foundation and Richard, Frankie, and Sean from the Sunnyvale location did an amazing job. They were always on time, worked hard, and cleaned up very well after themselves every day. I highly recommend Groundworks for all your future foundation needs *thumbs up* read more

If I could review the on-site crew and the front office separately, Sebastian and Brandon would get 5 stars for their hard work. Unfortunately, the sheer administrative negligence, constant delays, and complete lack of communication from Groundworks San Jose force me to give this a 2-star review. What was sold to me as a 5-7 day project is now dragging into its 8th week of active construction, and will ultimately take over three months to finish. The nightmare started with the timeline. I signed my contract in mid-October 2025 and was promised the permitting process would take about two months, with an installation slated for early February. Instead, the permit wasn't even issued by the City of Sunnyvale until March 19th. My initial mid-March installation dates were blown right past. The communication--or lack thereof--is staggering. My initial project manager ghosted me twice on scheduled calls, forcing me to complain to the main digital call center just to get a response. Later, when I tried to get updates in March, I found out the initial permit coordinator was out sick, bringing the entire information flow to a halt. As for the project superintendents? I was promised an update from the previous superintendent four or five times over a 25-day span and never received a single call back. The newest superintendent is exactly the same: completely unreachable. But the biggest offense is how they handled the project revision. On March 23rd, the design was modified to include three helical screw piles. First, I had to wait three weeks just because the company only has one helical pile excavator available. Then, I discovered the absolute worst part: Groundworks completely failed to submit the updated design to the city. They literally forgot. I only found this out on May 14th because I proactively contacted the city myself. Because of their failure, the new permit coordinator just finally filed the paperwork in mid-May. Now, I am forced to sit and wait for the city to approve the revision before we can even schedule the pier/rebar inspection, pour the concrete haunches, and backfill. Overall, the physical job is good, but the delays are insane. If you hire Groundworks San Jose, be prepared to do the project management yourself, expect to be ghosted by leadership, and add months to whatever timeline they promise you. read more

We had Groundworks out to look at sloping of our living room floor. Derek was super informative and knowledgable. He spent lots of time taking measurements and pictures. He inspected the crawl space and was transparent every step of the way. We were impressed by the level of professionalism and knowledge of Derek. While we have not contracted with them yet for the work, we would feel comfortable that our house would be in good hands with this company, they seem to take a lot of pride in their work and reputation. Thank you Derek for taking the time to explain what our problem was and for putting our minds at ease. read more

We had several sunken slabs in our driveway, so we decided to go with the polyjacking service. Since there was a minimum project scope, James made sure they covered a large enough area to maximize the value for us. Rico and Robbie also went above and beyond during the job and did excellent work throughout the process. We would definitely use their services again! read more

UPDATE Pros Had a wonderful experience with Jim (inspector/sales), Jose (foreman) and team and Cody W. Cons The delays in this project caused me cost increase in my next project (roof replacement) Some not so pleasant experience along the way I requested a quote with Bay Area Underpinning, but my inspection in November 2024 was with Groundworks. Bay Area Underpinning was transitioning to Groundworks. I had issues with JIM, which were resolved. I became comfortable to move forward with the project due to a wonderful conversation with Jim in resolving the issues. Poor communication/ no communication from the company ensued. I wasn't getting updates The only information I knew at that time was repair/installation schedule in June 2025. No communication or permit filed to my HOA, which was disclosed att the beginning, that led to further delays in the project. At this point I found out permits from the county were approved back in March 2025. Fast-forward I met Cody and Jose, who are absolutely phenomenal in the project. I felt safe during the project. I have already spread the word to friends and neighbors who might be needing Foundation Repair to contact Cody and request for Jose. read more

I worked with Ian Kee and was really impressed with his professionalism, timely responses and knowledge. I enjoyed working with him and was glad he was assigned to my project. read more

The inspector Derek came to look at our house. We had been noticing cracks in some of the walls and were worried about its evolution. Derek came on a Saturday morning at 9h. He was very communicative before calling to confirm. He showed up on time and clearly explained the process. Derek took his time looking at the outside of the house, doing floor level measurements and then investigating the crawl space. He was here a total of over 4h so it was a very detailed inspection. Derek then explained the possible solution (push piers) and laid out the cost. It is not cheap but in line with expectations. Groundworks also offers financing which is a convenience. Derek took detailed pictures and shared them. The experience so far has been great. We still need to decide when we would do the work but I would definitely recommend getting an inspection if you are concerned about your foundation. The sales tactics are obviously there but not pushy and the information provided is valuable whatever you decide to do. We haven't yet done the work so will update the review if and when we proceed. This review is just for the inspection. read more

The start of our experience as rocky, but that was out of Groundworks control - or perhaps could be chalked up to growing pains of the company. That said, their work has been phenomenal, and we're truly very happy we had the work completed when we did. Ashton came to check on our supports and adjust things recently, and he's also gone out of his way to help us understand how a project we're hoping to undertake could affect the foundation. He even hoped on a call with our structural engineer to provide insight and information. This was completely beyond what we would have expected but genuinely kind. We're very grateful. read more

Derek Olsen visited for initial inspection of our house crawl space. He was thorough in his inspection and discussed various solutions. He was very professional and on time, and spent serval hours assessing the condition of crawl space and foundation. I highly recommend Groundworks for initial assessment. read more

Enrique came to my house for inspection of the foundation. I appreciate his work ethic and his explanation of the potential problems my houses foundation may have . He's also quite professional, and courteous. Thank you ! read more

Mark did a very thorough inspection and provided a detail quote for the work. Very professional and answered all questions with detailed information. read more

Our Family was very pleased with the recent work performed from the January contract throughout the week long" hands on" project by Groundworks 1161 N. Fair Oaks Ave Sunnyvale, CA 94089 members. All the Team members were very professional with communication skills and keeping us informed of the status of the project thru voice, Tech messages , email, and including pictures. From Stephan Adams, and the many members of the on sight team Jose, the Team Chief, was outstanding! read more

Terrible company. Signed a contract and paid deposit and company has no showed on me twice now. Neither time did they communicate with me about issues, or give me notice that they were not coming. Both times they have cited broken equipment as the reason, but to not have any communication is absurd. Avoid this company if at all possible. It has been nothing but a headache. 2/18/2026 update- As an update to my prior review- I was able to get in touch with the GM who listened to my concerns and offered to refund deposit and also prioritize completing the job the same week. I had to decline, as I already signed with a new contractor. I do appreciate him taking the opportunity to correct the issue and the follow up communication 2/25/2026 last update- Never got my refund for my deposit that the GM said he would give me. Back to one star. Avoid company! read more

Had an initial consultation and they were able to identify and assess the issues with my foundation. They were able to explain and walk me through what options were available to me to correct the issues I am seeing in my foundation. Very informative in the way to identify and repair the common issues for homes in San Jose. read more

i really appreciate that eric came to our house were we had work done a couple months to help with some bolts. He was friendly, polite and worked fast. He made sure things were done right read more

Worked with Leo. He was prompt, thorough, knowledgeable and honest. Upstanding company

Shayan was very professional and sensitive to the fact that he was not giving us great news. He did a good job of explaining the issues and the recommended solutions. read more

It pains me to give a negative review as the initial dealings were actually quite good; They worked with me to get the price down a bit, the GF for the installation was dedicated to delivering a good product and the methods and materials were very good. However upon completion of the work, I had an issue which was unresolved. This left me having to go into my crawlspace and deal with an ongoing leak from the dehumidfier. I have reached out multiple times and the issue is unresolved. This is truly unfortunate as they were one of only a few contractors that were ready and willing to do the install right, giving me what I specifically asked for. I paid a correspondingly significant price over the others. The follow up to date has been very disappointing. read more

Absolutely terrible phone person, tried to explain that I needed help with my driveway slabs being jacked up. Either she didn't understand or she kept sending me to the Better Business Bureau. I don't know why maybe there was just a disconnect just really poor read more

Quote was scheduled for area code 92405 and Justin was given the task of providing quote. A lot of unanswered questions and the feeling of not wanting to be helped prompted me to go to Saber foundation which they gave me an actual quote assessment, showed me what was going to be done and an actual solution. Justin from Groundworks identified the crawl space of not being over 18 inches and immediately declined doing work and stated space needed to be cleared. I was ok with that, but Justin made it cleared that there was nothing that can be done and never returned my proposed solutions as far as clearing some space. It seems to me as if they didn't really care to help and didn't make any effort to gain my business. Saber came out and didn't state anything about clearance issues which tells me Groundworks is either to good for this repair or is to lazy for their fat employees to fit under my crawlspace. Either way it doesn't matter to me, I'm glad Saber found a solution the first time and are scheduled for repair as soon as proposal is approved by city. Better luck next time Groundworks and your S#$% does stink. Justin you're a flop do your job and give quotes as part of your job duties. read more

The miracle guys were here again. Last week Rico and Robbie were here to level the slabs in my back yard. By the way that patio now looks brand new !!! Yesterday Rico and Robbie were here again only this time to try to fix a much more difficult task. My air conditioner compressor sits on a pad that sits on a concrete slab that had fallen about four inches into the ground since it was installed decades ago. The compressor pad itself has been kept level with wooden plugs placed under it and on the concrete slab. There is a metal pipe that goes through the wall of the garage is attached to the compressor and it is not very flexible and could not be moved so it had to be handled very carefully so as not to break if the A/C moved up or down too much. Rico and Robbie used jacks to hold the A/C pad up while removing the wood slats below it then slowly lowered the pad with the jacks while carefully watching the pipe coming out of the garage wall so it would not break. Once that was done, the foam was shot into the ground beneath the concrete slab and WOLLA it was done !!! Again - the miracle guys were here ... again !!! read more

The inspection and proposal process was done by a well qualified professional who took the time to explain everything. The company was fast to reply a d provide me with a highly informative inspection. read more

I booked an inspection with Groundworks. Alex came out and was phenomenal. Professional, communicative, knowledgeable. Informative but not overly sales-y. Will definitely turn to him for any work I need now and in the future. read more

Wow Derek answered all my questions and in 90 minutes brought me peace of mind about my foundation. They are foundation specialists for sure! read more

Alex H. came out to my project, took the time to ask me the issues we were having, how much information I knew about the potential fixes, educated me, and took a look around the property as well as did a full inspection of the crawl space. He came back with tests, video and pictures, let me know what part of the house we were looking at, issues and how they would go about fixing it. Explained the materials they would use, timeline, scheduling and what would needed to be done prior to their arrive. It was a great white glove service. read more

Howard visited and gave me a detailed evaluation of the work required to resolve my slab issue. I appreciated his professionalism.

Alex was very informative on my project was through on my problem however the large tree next to driveway was extremely damaging my driveway beyond what groundwor could repair was courteous and friendly thanks for your help read more

This is by far the worst and terrible company to work with. Don't be misled by how professional they present themselves. If possible please AVOID doing business with this company. They started the job back in Oct. 1st-Oct. 6th. After receiving partial payment they went completely ghost. They never showed up for final inspection with the city. They stopped communicating and there was NO way to reach them. Ramon and his team never came back to finish the job. This experience has been very stressful and caused a lot of damage. We are now stuck with unfinished foundation and was forced to remove our deck. If ZERO was an option for the rating. That's what I would rate this company. read more

Once the permit was approved, Groundworks was eager to get started. Fortunately, we had a pretty dry January. I am glad that the crew finished the work in under four weeks (single level home, 1333 square feet, with a challenging crawl space). The foreman, Estevan Jimenez, managed the crew, morning to night. A variety of skilled workers contributed, including a lot of soil management. Some extra features were added as they were needed, like french drains along the interior perimeter. No pipes were broken, some cracks appeared, as expected, and many of the doors work better than before. I feel confident that we have a good chance of preserving this old house for many years to come. read more

We had a great visit from Joel Brown. He was incredibly knowledgeable and was able to give the best course of action for our situation. Would recommend. read more

This post is only for Moses, the Foreman that works with Groundworks. He did the foundation work and was done in a day. If you get Moses as your Foreman, you will get same day responses. He is very helpful and will provide all the answers you have. In regards to Groundworks as the company. That will be another post unrelated to Moses professionalism. read more

If I could give a zero I would. I'm a real customer and am going to file a BBB complaint. I've heard great things about Bay Area Underpinning from friends. It got bought by Groundworks and the owner lives in Virginia Beach which should be a hint it doesn't care about customer service. We initially had Bay Area Underpinning come couple of years ago and they said our foundation was okay. No work needed to be done, but earlier this year Underpinning came and said we needed helix piers installed ($100k). Now looking back I would recommend getting a 2nd opinion including a structural engineer. They completed project and wanted final payment however they did not schedule final inspection and it's been almost 3 weeks since they were done. It took a lot of phone calls and emails with minimal response. We spoke to Will from customer service who finally got our debris removed from our house after it was hanging out for a week. But now crickets when it comes to final inspection which worries me because they already poured back in the concrete. There are other issues to mention in which you can message me, but definitely be aware of this company! Worst customer service for this amount of money read more

They communicated well, stayed late to get the job done, and helped us troubleshoot when we didn't have electrical installed in the crawlspace like we thought to plug the sump pump in. Everything seems to be working great! read more

Darren Breen quoted 2 of the properties I manage knowing that his company cannot do the jobs because of the roots of the tree that damaged the driveway of the properties. He wasted so much of our time. Before going with this company and if you get Darren Breen as the Project Manager make sure he knows what to do with the job. read more

Groundworks - Foundation Repair Near Me - Sunnyvale, California

Came out during escrow gave us the cheapest quote of any company. Signed the contract. An inspector came out to look at property before doing the work. Then they went completely ghost, following up about 5 times before they called to me tell me they actually dont want to do the work in the contract we signed. read more

I have been dealing with cracks in walls and ceiling, sticking doors, cracks in foundation, gaps between walls and floors, cracks in brickwork, the list goes on. So I made an appointment with Groundworks. My foundation inspection with Howard Glancy was beyond my expectations! In addition to be kind, respectful and patient......Howard was professional , efficient and extremely knowledgable. My questions were answered with clarity and reassurance . Howard explain in detail the scope of work that is needed for my home. Communication with Howard was easy and he gave me a great sense of comfort. Howard's honesty was impressive , a quality that is difficult to find these days. Having Howard's support and amazing service, I have a great peace of mind. I would recommend Groundwounds! read more