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?

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!

George is a great geotechnical engineer, with a tremendous knowledge of how to design cost…read moreeffective solutions. He has saved my construction business a lot of time and money for over 25 years. Searched the internet for his phone number, came across it on Yelp...and thought what the hec...I'm gonna give him a five star review :0). Tom Lynch Construction Guerneville, Ca.

George Young has been a Geotechnical (Soils) Engineer in Santa Rosa for over 25 years. Highly…read morerecommendable professional engineering services.

Working with Irvin at Prostruct Engineering was a breath of fresh air. After purchasing a new home…read moreand enduring my first winter, I was incredibly nervous to find significant water in my crawl space and cracks along the raised foundation. I initially signed a contract with Prostruct, but after Irvin reviewed my photos, he demonstrated a level of integrity that is rare to find. Instead of taking the job, he honestly informed me that my specific issues fell outside their scope. He took the time to explain what I was seeing, referred me to a geotechnical engineer who could actually solve the problem, and issued me a full refund. I greatly appreciated his transparency and professional guidance. I highly recommend Prostruct Engineering to anyone looking for an honest assessment--they clearly prioritize the customer's needs over their own bottom line.

DO NOT USE THIS COMPANY -- terrible communication and shady tactics…read more I reached out to ProStruct Engineering for a simple onsite structural evaluation at my home in Danville. They sent a 10-page contract and demanded the full $1,100 upfront the same day, before any work was even scheduled. After I signed and inquired, I asked the project manager multiple times for a firm date when the engineer could come out for the survey. Instead of giving a straightforward answer, they used clear delay tactics and kept putting me off with vague responses. When I finally decided to cancel before any site visit or report was started, their own contract (Section 5.5) clearly states I should only owe a $500 "setup fee." Yet they are now treating it as if I owe the entire $1,100. This is a classic "pay us everything first, then we'll drag our feet" operation with a heavily one-sided contract designed to trap customers. Save yourself the stress, the risk of a lien on your house, and the endless runaround. There are plenty of other licensed structural engineers in the Bay Area who actually communicate and don't play games with scheduling. Would not recommend. Proceed with extreme caution.

Dimensions 4 Engineering helped us through the process of developing our property. We hired them…read morefor topo mapping, septic system testing + design, grading/drainage plans and permit processing. We were very satisfied with their work through all the hurdles of building our new home.

From the owner: Projects Completed On Time & On Budget By Our Civil Engineers…read more Dimensions 4 Engineering, Inc. offers extensive experience with commercial, residential, and public works projects while providing engineering services to accommodate the specific needs of Sonoma, Marin, Napa, and Mendocino counties. Our diverse Engineering experience, coupled with our in-house design staff allows us to provide a wide range of services for your engineering objectives.

I purchased a piece of property in Mendocino county and I strongly suspected that my neighbor was…read moreencroaching onto my side of the parcel boundary. I called Hogan land services and they were quick to call me back and advise me of how I might easily be able to pinpoint the county boundary markers myself. But I leaned toward hiring them so I could have a professional on site to document findings and present them to my neighbor. Hogan land services delivered with five stars on every aspect of what I hired them for and what I hoped to accomplish. They were professional, polite accurate knowledgeable and incredibly helpful. On top of all that...They came in under their bid!!!!

Hogan tried to get a lawyer to threaten me and sue me for slander for using my first amendment…read morerights for writing a 100% true factual Yelp review about the deplorable "work" they did. I hired a ANTI SLAPP attorney and hoped they would sue as I would easily prevail. The business practice used on my elderly mother during covid was so unscrupulous, we considered filing suit for elder abuse, as they attempted to grossly over charge her for their mistakes and miscommunications, Eric was especially unscrupulous and totally inept at his simple job. They had the nerve to charge us for miscommunications on their end and then had their lawyer threaten us and then back down and go silent when they realized they didn't have a leg to stand on. Don't walk. Run. I laughed when I saw their 101 billboard advertising themselves as first responders. They are first responders like a vulture is a first responder to road kill. In other words, I am saying they engage in predatory business practices. If anybody else has been threatened with legal action for exposing these people please contact me and I can put you in touch with the best anti slapp attorney in northern California that already knows about these people. I am also happy to be a witness in any other legal action against this company. I have documents and emails that back up my claims here. I will testify to all facts above under oath in a court of law.

Get ready because Bob charges by the minute and he makes sure to talk a lot to get more money. I…read morehave worked with many building professionals in San Francisco and Sonoma County, and I cannot believe how he nickel and dimed us. Also, he did not even go underneath my home when we hired him to do our structural report for the sale of our house. When I called to ask him about why he did not do this, he talked for over 15 minutes telling me why he didn't have to go underneath the house. Then I received a bill for over $260 for that 15 minutes. A 45 minute visit to my home with only visual inspection cost me $1500. I suggest you find someone else to work with.

From the owner: Ost Engineering, Inc. is a structural/civil engineering and building code consulting firm with over…read more25 years of experience serving the public. Our mission is to provide quality structural engineering, design services, and code consulting to property owners, developers, and design professionals. We can work with you to facilitate your project development needs. Working with us you will receive a comprehensive evaluation of your project, and useful, honest, direct feedback concerning any special needs, so that we can work together to overcome any challenges that may arise. Our goal is a properly executed, professionally prepared, cost-effective submission package designed to secure approval of your project by the required governing agencies.

Many thanks to the DE team. Prompt, precise service on structural calcs and plans for a bathroom…read moreaddition in Sonoma County. They provided recommendations for things that our architect and builders hadn't caught.

I started working with Design Everett after my first architect took 4 months to get preliminary…read moredesigns back to me. My experience with Design Everest has been very positive so far. We're now submitting plans to the city for my small addition and so far I can't be happier. The whole team together with my project manager, Shivaprasad have been great to work with. I hope to start construction this summer and can't wait to see how the design will look once complete

Was quoted 3500. for a geologic soils testing. 3 years later they quoted me 6500. for almost the…read moresame scope of work. It took the guys 4 hours in the field to do the sampling work and probably a couple of hours in the lab. Unfortunately i had signed a contract and decided to pay the ransom rather than get in a prolonged legal dispute. The results were exactly what i already knew that there was rock 4 feet under the ground. Only now i have pages of boilerplate. Government, county, permits, consultants, all pat each others back to take your money and waste it.

Avoid doing business with PJC at all costs; they sent a bill to the wrong address, and quickly sent…read moreto collections rather than checking the billing information. Despite paying it quickly when finally received, and asking them to revoke the collection they never did and my credit was damaged.