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James Morris Kosareff

Trusts Attorney at Santa Ana, CA

5.0   4 reviews
  • Licensed for 29 years
    State CA
    Acquired 1994
    Active No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About James

Learn James’s areas of practice.

Copenbarger & Copenbarger LLP. began in 1979 when Lloyd Copenbarger was admitted to practice law in California and opened a firm known as Copenbarger & Associates. Since that time, Lloyd and his associate attorneys have provided substantial services in the personal estate planning and business succession planning areas and have helped thousands of people to create estate plans that include contributions to their favorite charities. Throughout the years, the firm has seen many changes, and is now comprised of three full time attorneys and one additional attorney who is of counsel to the firm, and it continues to grow. However, despite any surface changes, one thing has always remained constant: Copenbarger & Copenbarger LLP provides clients with excellent legal services in personal estate planning and other related fields.


James M. Kosareff is an attorney practicing estate administration, probate, and tax law in the firm’s office.



Practice Areas / Responsibilities


Mr. Kosareff is the leader in the trust administration and probate section of the firm. He currently handles the vast majority of probate and trust administration matters, routinely advising clients and making court appearances on their behalf. He is also heavily involved in the tax and general estate planning areas.

Photos and videos


Copenbarger & Copenbarger LLP
200 Sandpointe Avenue Ste 150
Santa Ana, CA, 92707


5.0 / 5.0
  4 customer reviews
5 Star
4 Star
3 Star
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1 Star
Posted by David | May 10, 2023
This review is from a person who hired this attorney.
| Hired Attorney
James is a genuine person who has worked hard to become a trustworthy professional in the legal field. Our personal interactions have been satisfactory, informative, and pleasant. A person of faith who lives it! Thanks James.
Posted by Rich | July 11, 2022
This review is from a person who hired this attorney.
| Hired Attorney
Professional and Caring!
My wife and I absolutley love the care and committment your firm has given us while we have gone through the process of administering my mother's trust and will. We have been associated with the firm for many years and have always had not only positive interactions when needed, but have felt that we are cared for as people, not just clients! Thank you, James, and your amazing assistants for giving us the care needed during this time!
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Posted by Sergio P. | October 26, 2021
This review is from a person who hired this attorney.
| Hired Attorney
Excellent Service
I have had the pleasure of having James as my attorney for the past 20 years. James is a brilliant Attorney, I am grateful for his passion,dedication,professionalism and the personal relationship that we have stablished. It is always a pleasure in meeting with him, he is always willing to listen, and have the compassion to take the time to answer all of my questions, he always offers me different ideas and suggestions to look at my questions no matter how trivial or important they might be. I sincerely value his expertise and opinion, he is a person of high integrity and concern for his clients. I highly recommend James, you will not be disappointed.
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Posted by anonymous | October 19, 2021
This review is from a person who hired this attorney.
| Hired Attorney
Excellent experience!
We contacted Attorney Kosareff to discuss our Living Trust and to make some minor changes. He was extremely helpful and made recommendations that we are going to follow.


  • Free Consultation 90 minutes
  • Hourly Rates $ 100-500 per hour
  • Pro bono 10 %
  • Retainer Always
Payment methods
Cash, Check, Credit Card


AVVO RATING 7.4 (Very Good)

Work Experience

  • Associate Attorney
  • Copenbarger & Copenbarger
  • 2000 - Present


  • Chapman University, School of Law
  • Master of Laws (LLM)
  • 2006
  • Western State University College of Law
  • Doctor of Law (JD)
  • 1993
  • Cal Poly Pomona
  • Bachelor's degree
  • 1984
  • California State University, California Polytechnic State University
  • N/A
View all education

Languages Spoken

  • English

Attorney endorsements

Received (4)
Given (8)
Endorse James
Trusts Attorney | Jul 01
Relationship: Co-worker
"I endorse this lawyer."
Estate planning Attorney | Jul 10
Relationship: Supervised lawyer
"I have worked with James for many years and I highly endorse this lawyer."
Probate Attorney | May 14
Relationship: Co-worker
"I endorse this lawyer."
Estate planning Attorney | May 22
Relationship: Fellow lawyer in community
"I endorse this lawyer. Mr. Kosareff is extremely well versed in estate planning and administration matters as well as tax issues. He takes the time to ensure that client matters are effectively and efficiently administered. I do not hesitate to refer matters to Mr. Kosareff."
Estate planning
Estate planning
Limited liability company (LLC)
Estate planning