Serge Tomassian

Attorney Profile

Top Rated Construction Litigation Attorney in Irvine, CA

Tomassian, Throckmorton, Inouye & Grigorian LLP
 | 2601 Main St, Suite 620
Irvine, CA 92614
Phone: 949-955-2280
Fax: 949-476-8081
Selected To Super Lawyers: 2012 - 2021
Licensed Since: 1984
Practice Areas:
  • Construction Litigation: Business (50%),
  • Real Estate: Consumer (30%),
  • Business Litigation (20%),
  • Civil Litigation: Defense (0%),
  • Civil Litigation: Plaintiff (0%)
Languages Spoken:
  • English,
  • French
    Attorney Profile

    Serge Tomassian is the Managing Partner of Tomassian, Throckmorton Inouye & Grigorian LLP, a So. California-based specialty firm focused in real estate, construction and general business and civil  litigation. As a trial lawyer/litigator he is viewed as tough, detailed and highly experienced professional.

    Since 1984, Mr. Tomassian has successfully represented clients in all aspects of negotiations, litigation, trial, arbitration, mediation and settlements with awards in excess of $150 million. Areas of expertise include construction claims, defects, real estate. landslides, business and civil litigation. He has handled a number of high profile Construction, Real Estate, Business & Landslide cases.

    He graduated USC (Phi Beta Kappa)  and McGeorge School of Law ( Moot Court Honors Board). He was voted Best Lawyers In America, Super Lawyer for So Cal.,  Top Lawyers in OC, AVVO Rating of Superb 10, Highest Rating of AV for Martindale Directory. He is also an experienced and skilled Arbitrator and Mediator for the American Arbitration Assoc.

    *AV Preeminent and BV Distinguished are certification marks of Reed Elsevier Properties Inc., used in accordance with the Martindale-Hubbell certification procedures, standards and policies. Martindale-Hubbell is the facilitator of a peer review rating process. Ratings reflect the anonymous opinions of members of the bar and the judiciary. Martindale-Hubbell peer review ratings fall into two categories: legal ability and general ethical standards.

    Practice Areas
    • 50%Construction Litigation: Business
    • 30%Real Estate: Consumer
    • 20%Business Litigation
    • 0%Civil Litigation: Defense
    • 0%Civil Litigation: Plaintiff
    Focus Areas

    Construction Defects, Condominiums & Cooperatives


    Selected to Super Lawyers for 10 yearsbottom-image

    Super Lawyers: 2012 - 2021

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    About Serge Tomassian

    Admitted: 1984, California

    Professional Webpage:


    • Phi Beta Kappa
    • Phi Delta Phi
    • Golden Orange Award 2013 for leadership for World Affairs Council of Orange County, Golden Orange Award 2013
    • Named in Best Lawyers of America, Best Lawyer in America, 2016
    • Pi Sigma Alpha
    • Blackstonians
    • Arbitrator and  Mediator, American Arbitration Association, 1991-Present
    • AVVO rating of perfect 10 as superb, AVVO rated Superb, 2012
    • American Jurisprudence Award for Agency
    •  International Moot Court Honors Board
    • Armenian Professional Society of Orange County Award of leadership & service, 2011

    Special Licenses/Certifications:

    • Black Belt in Tae Kwon Do
    • Certificate In International and Comparative Law Studies-Paris France, 1981

    Bar/Professional Activity:

    • Member, State Bar of California
    • U.S. District Court Eastern District of California, 1984
    •  Board of Directors, Orange County Bar Association,
    • Member, Orange County Bar Association, Judiciary Committee Section
    • U.S. District Court Central District of California, 1984
    • Member, Orange County Bar Association, Business, Litigation and International Law Sections
    • Chair, Orange County Bar Association, Construction Law Section
    • California, 1984
    • Chair, Legislative Committee, Orange County Bar Association

    Pro bono/Community Service:

    • Chairman, 2001-2013 and Trustee since 1993 of World Affairs Council of Orange County
    • Guest Speaker on Genocide Prevention and Awareness.
    • Member, Legal Advisory Committee, General Contractors of California
    • Arbitrator for OCSC Served as mentor for OCBA Orangewood ProgramChurch Sunday School volunteer-Irvine Mariners ChurchServe as member of HEROES for kids elementary school President 2007-09 of the Orange County Armenian Professional Society.
    • Board of Directors for World Affairs Councils of America-based in Wash DC, 2016
    • Chairman of the World Affairs Council of Orange County 2001, 2002 & 2011-12
    • OCBA Constitutional Rights Foundation-Served as Judge for Moot CourtJudge Pro Tem for OCSC and Small claims.
    • Member of 1918 Society World Affairs Councils of America

    Scholarly Lectures/Writings:

    • Speaker, Lorman Seminar on "When Construction Projects go Bad".
    • Speaker, Lorman Seminar on Public School Construction
    • Speaker, American Arbitration Association-Seminar UCI-ADR
    • Speaker, Orange County Bar Association-Construction Symposium
    • Speaker, Association of General Contractors-Legal Advisory Committee
    • Speaker, Mediating Case Irvine HOA-Woodbridge Board of Directors-Protection against Litigation.
    • Speaker, Mitsubishi Corporate Offices-Speaker on Effective Mediation.
    • Speaker, Various Trade Organizations on Preventing and Defending Against Liability Claims.


    • As Plaintiffs counsel I have recovered through Trial (both jury and bench), Arbitration or Mediation in excess of $150,000,000 in damages. As Defense counsel-successfully defensed against several large complex Real Estate/Construction matters with each matter involving claims in excess of $20,000,000. I have been mentioned in Daily Journal Verdicts and Settlements on many occasions with a recent settlement and verdict in excess $10.5 million dollars. First ever jury verdict  against the County of Orange in 2010 for liability for a defective and deteriorated Storm Drain causing building damage.

    Other Outstanding Achievements:

    • Chairman of the OC World Affairs Council (WAC)Chairman of Programs for WACMember of World Affairs Council of America-President's CircleLeadership mission trip to Israel-WACA 2008President of OCAPSLecturer and Speaker on Construction matters for Lorman Seminars and OCBAPanel member of AAA-on OC legal advisory council

    Educational Background:

    • University of Southern California, B.A., 1979

    Industry Groups

    • American Arbitration Association
    • California State Bar Association
    • Orange County Bar Association
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    Office Location for Serge Tomassian

    2601 Main St
    Suite 620
    Irvine, CA 92614

    Phone: 949-955-2280

    Fax: 949-476-8081

    Serge Tomassian:

    Last Updated: 2/2/2021

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