Who We Are


Experience matters. Having a law firm on your side that has previously been involved in very complex and challenging business and construction legal issues gives your company an edge. Mahyar has a Masters’ Degree in Physics from California State University, Long Beach and a technical background instructing engineering scientific classes in classroom and laboratory settings.

Construction cases are reliant upon expert testimony. Experts are either scientists or engineers. The ability to communicate with them as a fellow scientist, and to translate complex scientific and engineering concepts and terminology into easily understood language is valuable for our clients as well as the Court or jury.

Our business clients respect her background in the corporate world serving on the board of various corporations, as well as successfully running her own small businesses and advising business clients on all aspects from start up to expansion, from negotiations through litigation, and from planning to execution.

Mahyar Ghassemian obtained her Juris Doctor degree, graduating cum laude from Western State University College of Law in Fullerton, California.


Ghassemian Law Group is known for its client-centered service and cost-effective rates. Ghassemian Law Group has earned a perfect 10.0 rating and 5 stars on Avvo, one of the most respected attorney rating websites in the world. To customize a strategic plan and cost effective rate structure for your legal needs, call us at: (949) 436-2785.


We have represented some of the nation’s largest businesses, builders and contractors in litigation as well as transactional matters. We can help you with a litany of large and small legal issues. Ghassemian Law Group also serves as general counsel to several California small to medium sized companies including: Retaining Walls Company, The Patterson Company, and many more. We have represented the following national companies in litigation:

Mission | Vision | Values

Our mission is to enable business owners to have peace of mind. We are a boutique construction law firm with big firm experience.

Our Team

We empower business owners to succeed and resolve disputes effectively by offering the legal expertise of a large firm on a small firm scale. Read about our team of expert attorneys and support staff that comprise our boutique firm.

Honors & Awards

Mahyar Ghassemian has received a number of honors & awards including the title of State Board of Directors for Associated General Contractors of California.

Small Firm Advantadge

Ghassemian Law Group is a small firm with big-firm expertise. With over 20 years of experience, we’ve represented many businesses, builders, & contractors.
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I can’t say enough positive things about the incredible team at this attorney’s office. From the moment I spoke with them on the phone, I knew I was in capable hands. Even though I am a North Carolina business I had a very complex case in California. The law firm and attorneys were the best of the many, many law firms I interviewed. I can not say enough how easy they are to work with from start to finish.
Their expertise is unmatched. They navigated the complexities of my case with professionalism and confidence, leaving no stone unturned. Their depth of knowledge and strategic thinking were evident every step of the way.
What truly sets them apart is their genuine care for their clients. They listened to my concerns, answered my questions promptly, and ensured I felt supported throughout the entire process. It’s clear they care about their clients and they’re in it to make a real difference in people’s lives.
The professionalism and attention to detail displayed by this office are outstanding. They kept me informed, were always on time, and made sure I understood every aspect of my case. They turned a potentially stressful situation into a manageable one.
I’m incredibly grateful for the exceptional service and favorable outcome they delivered. If you’re seeking legal representation that combines expertise, compassion, and dedication, look no further. This attorney’s office is a true gem and worthy of every one of these five stars!

Christopher Grouse

Grouse Industries, Inc.

Mahyar and her team possess a wealth of construction and business law expertise. Expertise to both guide a client away from litigation and, if not possible, to skillfully represent them in court.

Thierry Montoya

AlvaradoSmith APC

Mahyar Ghassemian and her firm are the best construction dispute litigators and negotiators in the industry. Mahyar is an expert in this area. Her firms knows the law and are very tenacious in obtaining the best results for their clients. I have been involved in very lengthy litigation as co-counsel in a very big case and jury trial. Mahyar is one of the hardest working and most effective advocates I have ever had the privilege of working with.

Paul Hoffman

Hoffman Legal Corporation

Small Firm Value – Large Firm Expertise