Margaret Grignon
Justice Grignon is available throughout California.

Hon. Margaret M. Grignon​

California Court of Appeal, Second District, Retired​

Recognized as an excellent settlement judge on the Superior Court, Justice Grignon continued to settle a multitude of cases on the Court of Appeal. She was named one of the Daily Journal’s 2010 Top Women Litigators, one of only three appellate lawyers on that list. She has become a popular ARC neutral in complex matters. Justice Grignon spearheads ARC’s Appellate Evaluation and Consultation Program by providing pre-appellate argument analysis of briefs and oral argument as well as post-trial dispute resolution.

 

Practice Areas

  • Business / Commercial
  • Complex Litigation
  • Construction Defect
  • Employment
  • Family Law
  • Insurance Coverage
  • Bad Faith
  • Intellectual Property
  • Legal Malpractice
  • Medical Malpractice
  • Personal Injury

Conflict Resolution Experience

Justice Margaret M. Grignon recently retired from the California Court of Appeal, Second District, Division Five, where she spent 14 years and authored more than 2,200 opinions, including 160 which have been published. Justice Grignon has a reputation as a dedicated, hardworking jurist who demonstrates caring and concern for all parties. She is also described as thorough and extremely bright, with an impressive knowledge of the law. Justice Grignon’s instinctual ability to read between the lines and identify key issues has made her very successful in bringing cases to closure.

After graduating first in her class at Loyola Law School, Justice Grignon began her legal career as a clerk for Justice Robert Thompson of the 2nd District. As an attorney, she specialized in tax and business law with O’Melveny & Myers and Gray, Cary, Ames & Frye, and later opened her own private practice in Palmdale.

Justice Grignon was appointed to the Antelope Municipal Court in 1984 and elevated to the Los Angeles Superior Court in 1987. In 1990, Justice Grignon was appointed to the Court of Appeal.

Organizations & Achievements

Education & Training

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We Handle Complex Dispute Cases Of All Kinds

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Our Testimonials

Testimonials From People We’ve Helped

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Very professional place to mediate a legal matter. Many places to have a private conversation, comfortable surroundings

Linda L Mitchell

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Honorable Mary Thornton House mediated over our impossible case. I never thought this could get resolved, as we were stuck on both sides for almost 4 years. Honorable Mary Thornton House listened to both sides and was able to communicate in a way that both sides understood. She was tenacious, diligent and had attention to details with the accounting and figures presented. We went back and forth into the night. But, she was able to calmly able to get a resolution on both sides. The honorable judge said that in ruling a case in court. You have an instant friend and a permanent enemy. In this case, I received a fair resolution. Grateful, that I did not have to go to court. Glad that our case got resolved. I highly recommend honorable Mary Thornton House

Aileen B.