We hired Xalos to repair a section of spalling concrete on the outside of our crawlspace. Andy did…read morea great job explaining exactly what their approach would be and provided a reasonable estimate. Work was scheduled easily and completed quickly and thoroughly. Great experience from start to finish.

Came out and did a complete inspection at no charge! Who does that!? Turns out our house is pretty…read morelevel aside from a small deviation in one area and nothing needs to be done at this time so we fully expected a fee. The inspector was very helpful and thorough- definitely call them!

Did not have any work done yet. They sent Howard for an inspection. Super knowledgeable. Honest…read more(rough) estimate of scope of work to be done due to house leaning with cracks in walls. Based on Howard's knowledge and experience we need to discuss options for corrections. Thank you Howard, it was nice to meet you.

was very nervou about an older home we were looking to purchas. we set up an appointment with…read moreGroundworks for 4/1/26... The inspector that came out was Enrique Vera. He was punctual, prepare and communicated well about the appointmen. when he arrived, he explained in detail what he was gonna do and look for. He was incredibly professional and friendly the entire time. He spoke to me in detail about everything that he found and gave me his expert advice on it. Enrique was incredibly thorough and had great knowledge of the job in the end. He found nothing he felt was in need of immediate repair. I was absolutely not expecting that. He also provided me a time line of what to look for in the future. if given the opportunity to get an estimate would highly recommend Groundworks and especially Enriqu.

Cesar at Sierra Concrete helped me patch up an area that has been bugging me for years because of…read moredrainage issues. He installed 40 ft of channel drain in area that had some pretty uneven existing concrete and did a very nice job. Showed up on time and finished the job earlier than expected.

Cesar and his amazing crew accomplished a mind-blowing amount of work in less than a week and with…read morethe utmost professionalism. We are building a pool in our backyard, and needed a concrete contractor to pour a concrete decking all around the pool. After much deliberation and interviewing 5 different contractors, we hired Sierra's Concrete to do the concrete decking. They were the most responsive, had the best suggestions, and they had a large selection of photos of their previous work online. Their contracted work entailed: 1 - digging an 87 feet long, 6 feet deep French drain around the pool 2 - installing surface drains to collect rain water 3 - forming and pouring a roughly 1500 square feet deck according to our custom design Sierra's Concrete performed the work to perfection, ahead of schedule, and left the place cleaner than how they found it. It was a real pleasure to witness their performance. Their dedication, coordination, attention to detail and work ethic all shone during the 6 days that they spent here. I never witnessed any heated temper or frustration, the entire crew worked in perfect harmony in a relaxed but professional atmosphere. You could tell that they enjoyed working together and took great pride in their work. Cesar had excellent suggestions to improve on my design. I never had to ask him to do anything twice, and he was true to his word until the very end. His team worked relentlessly, barely ever taking breaks, moving from one task to the next without ever getting into each others' way. They left the site immaculate, even taking the time to pressure wash the driveway. They went above and beyond the call of duty at every step of the way. The end result of their combined effort exceeded our expectations. Cesar is a maestro, and he orchestrated everything with talent and brio. He and every member of his team are true artists. I would enthusiastically recommend Sierra's Concrete to anyone looking for quality drainage systems and beautiful concrete work. I could not have asked for anything better.

Fen Wang has done an outstanding job on our project. After our home burned down, we hired a Prefab…read morecompany to rebuild it, which ended up being a nightmare. There were countless issues due to the Prefab company, not ZFA. Thankfully, Fen was always kind and patient dealing with every issue that came up, and he always provided a solution. It has truly been a pleasure working with Fen, and I can recommend him without reservation.

From the owner: ZFA is a 60 person structural engineering firm serving public and private clients throughout…read moreCalifornia since 1974. We deliver structural engineering expertise to the commercial, correctional, civic, fire, education, wineries, retrofit, design-build, hospitality, healthcare and high-end residential and historic sectors. ZFA is an employee-owned Small Business Enterprise, licensed Federally and in the State of California, with five Bay Area offices. How may we help you today?

Ben Rivas and his family-run business are superb! They completed a massive excavation, retaining…read morewall and patio construction project around my brand new pool. They even created concrete tiles to create a very modern, aesthetically pleasing look around the entire pool. I needed a small structure to house my pool equipment and they did a perfect job. They have attention to detail and they are very customer service oriented. They always promptly replied to any special requests and they truly want you to be happy with the final project. Ben and his team always clean up and they don't mind expanding their scope of work. They are not a company that will nickel and dime you with every small change. Finally, I found their costs to be very reasonable. I would highly recommend them!

Highly recommend this company for any of your concerte needs! We needed a slab poured and a porch…read moreand sidewalks. He also put a coating on it, and we just absolutely love it! They got the job done fast and were clean and organized!

I was very impressed by the quality of the work. Everybody was friendly and professional…read more Additionally, they offered suggestions that improved upon my design. I wouldn't hesitate to use them for any future projects.

Update: the work finally got done and it is beautiful. Their reputation as the gold-standard for…read morethis kind of work is clearly deserved. Upgrading to 3 stars, with the 2 star penalty for the totally ridiculous year+ it took me to get them to actually do the job. The simple answer to the owner's question of "how can we do better" is to honestly and accurately inform customers about what to expect, and then deliver. No secrets there.

Steve came over today and spent nearly 2 hours thoroughly explaining not only the situation of our…read morehome, but a history of building construction since the 1930's. With illustrations and insightful metaphorical explanations, I got a better understanding of the way soil moves and changes with the seasons and over time. He also did a great job of understanding the effects of water and soil movement. I've had four other contractors come over to my house, and this was by far the best in the area at understanding concepts of my foundation clearly, without being made fearful of potential outcomes. This information helps clarify and understand my home a lot better, and I'm so grateful for the detailed explanation with a friendly disposition. I now have an elevation reading of my entire home, a better understanding of my floor and foundation, and know some steps to get towards a more stable foundation for my home in Concord. After struggling with other companies in this area, I'm definitely confident in engineered soil repairs to be our solution. Thanks Steve and ESR!

Drew Rapoport was instrumental in keeping our project running smoothly while re-leveling the…read moredownside slope of our house, keeping it from slipping. He was professional and kept the crew on the time schedule, making this a painless project for us, as it was completed promptly. We were never inconvenienced or had to move from our house during the construction. Thanks again, Drew, for all your hard work. We highly recommend Maloney Construction, Inc. Larry and Sharon - Gardiner Company ~ Isleton, CA

Sean came out to see my retaining project and told he'd get back to me with costs after checking…read morewith the city regarding permits. Didn't get back to me and I called him, and he said he'd get to it that week which was over a month ago. Haven't heard from him since.

I appreciate the help of MKM in designing the foundations for my Timber Framed Barn "kit". They…read morewere flexible and willing to work with another Structural Engineer to meet the needs of Building, County Code, and me.. the owner! Thanks for the help.

I recently bought a home in Sonoma that had a Cornwall and needed to have piers put in where some…read moreplumbing work had been done. I contacted the engineering group at MKM and was put in contact with Nick Stuart. Nick came out and did a site visit and then worked with a designer to work on a voluntary repair plan to better support my foundation and wall. The experience while working with him was great. He was very responsive, kept to a schedule and came in at the budgeted amount forecasted for the work. He even did above and beyond items, dropping copy of plans off to me while I was at the permit office! I would absolutely recommend them in the future and plan to work with them again on a second unit in the upcoming months. They are extremely professional, have a great work ethic and do a great job!