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Konstantine Antony Demiris

Litigation Attorney at Walnut Creek, CA

4.9   23 reviews

About Konstantine

Learn Konstantine’s areas of practice.

5
Practice areas
  1. Litigation
    25%

    17 years, 100 cases

  2. Elder law
    20%

    14 years, 75 cases

  3. Trusts
    15%

    17 years, 50 cases

  4. Estate planning
    10%

    17 years, 50 cases

  5. Guardianship
    10%

    15 years, 50 cases

  6. Probate
    10%

    15 years, 35 cases

  7. Wills and living wills
    10%

    17 years, 50 cases

Konstantine "Kosta" Demiris is actively involved in the Contra Costa County legal community and Bay Area.  His practice centers on elder law, elder abuse, conservatorships, will and trust litigation, general civil litigation, HOA litigation, and appeals.  He has a wealth of trial experience and has successfully litigated several multi-million dollar cases. He has successfully defended all nine decisions in his clients' favor that have been appealed.

 

Kosta is a member of the Board of Directors of the Contra Costa County Bar Association's Elder Law Section.  He serves as court-appointed counsel in Conservatorship cases in Contra Costa County.   In 2015 he was elected President of the Contra Costa County Barrister's Section.

 

Kosta is committed to his clients and gets results.  

Photos and videos

Licensed for 17 years
State CA
Status Active
Acquired 2005
Updated 09/07/2022

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

Contact Konstantine

The Demiris Law Firm, P.C.
700 Ygnacio Valley Road, Suite 140
Walnut Creek, CA, 94596

Reviews

4.9 / 5.0
  23 customer reviews
5 Star
 
96%
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Posted by anonymous | July 21, 2021
This review is from a person who hired this attorney.
| Hired Attorney
VICTORY
Konstantine and his team are absolutely THE BEST! Not only was he available with short notice for trial ( less than a week) at the time of trial he was fully knowledgeable of my case and WE WON!! I can't say enough about his sensitivity regarding my probate matter going against family is tough enough but his knowledge of the law WAS AWESOME! THIS guy is a beast in the courtroom. If your looking for an HONEST ATTORNEY TEAM to have your back ( I AM A BENIFICIARY) this is WHO YOU NEED.... THANKS GUYS
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Posted by Dolores | December 16, 2020
This review is from a person who hired this attorney.
| Hired Attorney
Awesome lawyer and great firm!
Konstantine did an outstanding job settling a difficult trust for me. He did an excellent job on a deposition that helped my case and was able to reduce my costs more than half of what was being asked. He did a great job for me in getting a trust distributed fairly. Thank you to Constance and Kosta! D.S.
Posted by John | January 21, 2020
This review is from a person who hired this attorney.
| Hired Attorney
Elder Law & Trust
His firm represented us in a urgent mater. We were amazed how quickly his firm got a court date & resolved the issue. The Judgement included an order to reimburse us for all legal fees.
Posted by Philip | August 30, 2019
This review is from a person who hired this attorney.
| Hired Attorney
One tough situation
Mr. Demiris showed his professionalism, and concise plan for getting the job done. Attorneys I consulted with all pointed me to Konstantine as they saw this case was not in their level. It required an expert in this field. I highly recommend to anyone that have an issue with a will/trust to have him in your corner.
Posted by anonymous | February 12, 2019
This review is from a person who hired this attorney.
| Hired Attorney
Excellent, results oriented attorney
Konstantine Demiris is one of the finest Family and Probate attorneys in Contra Costa County. He is extremely intelligent, experienced and ethical. His charges are fair. He saw us thru a very difficult family situation with an excellent result. In addition he is a gentlemen a nice man. I highly recommend him. Sincerely, A very satisfied client.
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Posted by Lori | August 19, 2018
This review is from a person who hired this attorney.
| Hired Attorney
Konstantine Outstanding Gifted Lawyer and Person
From the moment I emailed Konstantine about Conservatorship issues, his response back was immediate, and I felt a ton of bricks lifted off my shoulders, by the confidence, intelligence, and kindness he portrayed in taking my case. The trust you feel with Konstantine is immeasurably. He always has your goals and best interest in mind. He is extremely laser focused, and gets to the point. He has been incredible throughout this whole process, adding his humor to an already stressful situation. Konstantine by far is a remarkably cultivated, highly skilled, well educated accomplished lawyer that you want for your case. He knows the Probate Laws, Elder Abuse, etc., and is a highly skilled litigator. I will use Konstantine over and over again. Great lawyers own their clients problem and engender a belief that they will do everything possible to help the client succeed, and Konstantine does just that. Konstantine genuinely cares about you and your case, and is extremely hard working, and professional. It’s amazing to find so many genuine qualities in one person. I will always be grateful for how he’s helped me. I would highly recommend him to anyone!
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Posted by Kathy | February 21, 2018
This review is from a person who hired this attorney.
| Hired Attorney
Extremely Helpful and Knowledgable
When I was having trouble getting the trustee of a trust where I was one of the beneficiaries to settle the trust or take care of the assets I hired Mr. Demiris. He was able to get the trustee removed and now we are able to move on with getting everything settled. During the whole process he provided me with a sense of relief knowing that someone who was very competent was there to help me through a very difficult situation. I would strongly recommend him for legal help in this field.
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Posted by Lisa | February 1, 2018
This review is from a person who hired this attorney.
| Hired Attorney
Konstantine has a lot of wisdom on how to win a case
My family found Konstantine’s law firm through a Friend. He’s knowledgeable... as a matter of fact I was going to let something go of value. I didn’t want to go through anymore. But Konstantine and his team took care of the matter. And my family won in court . I thankful to them ! I’m glad I listened to his wisdom. Now, my children and I can rest.. because it over. Thank you Lisa
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Posted by Imogene | March 11, 2017
This review is from a person who hired this attorney.
| Hired Attorney
Konstantine Demiris Recommendation
Konstantine Demiris has been my litigator for a family trust dispute. It was one of the most auspicious days of my life when he agreed to defend me. The dispute involved contentious family members, an aging mother who died before the dispute was resolved, and a plethora of complicated conservator and trust issues. Kosta is well-educated; he attended the University of California at Berkeley and the University of Santa Clara Law School. He is a consummate professional and has in depth knowledge of probate law and the workings of the courtroom. Kosta is always prepared to do research in the event of mind boggling issues for their legal resolutions. Kosta is personable and compassionate. He kept me informed of my ongoing case events without adding to my anxiety. We exchanged emails frequently and had phone conferences as needed. He has a wonderful sense of humor and that helped me survive this ordeal. The litigation involved an entanglement of assorted attorneys and petitions which Kosta unraveled with acumen. He was my North Star in troubled waters. Kosta is reasonable and fair with his fees. He deserves every penny. I highly recommend Konstantine Demiris for anyone’s defense in any probate court action.
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Posted by Francois Emaleu | March 6, 2017
This review is from a person who hired this attorney.
| Hired Attorney
Undefendable case
My loyer Konstantine Demiris is the best. During my case he defeated my enemies and restore my dignity. I will hire him again and again.i will recommend him to friend and family.he will answer phone calls at anytime 24/7 and give you all strength to fight back.my cases was very difficult he won all them. I recommend you Konstantine Demiris.
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Posted by Dana | November 17, 2016
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Great Phone Consultation!
I called Attorney Konstantine Demitris today concerning a serious family matter. He gave me his professional advice on the issue and offered me priceless advice. Along with being logical he was practical and realistic; giving me much insight in just a thirty minute consultation. Much gratitude and highly recommend!
Posted by Renu | November 14, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Excellent lawyer
As my lawyer, Kosta has been excellent as he has been giving been me great advice, really caring, promptly replying to all my calls & emails, and granted conservator even though it was a contested case. I am thankful to him for being there and for his hard work.
Posted by Chris | July 12, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Great and honest attorney
Konstantine was referred to our family by our family attorney Richard Lee and what a blessing for us. Our family was struggling with a very ill father and providing proper care for him required conservatorship of his person and estate. My mom and I didn't even know what a conservatorship was but Konstantine made it simple and easy to understand. He explained every step of the process and time was of the essence and he didn't lag. He kept pushing the process through courts and got it done. I know it's impossible to believe all attorneys are hones and fair but Konstantine is the Michael Finney of attorneys. He is always on your side. Great guy.
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Posted by anonymous | July 12, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Elder Abuse Case- Highly Recommended-Very knowledgable, straight-forward and supportative
Kosta was and continues to be excellent as my attorney in an elder abuse and conservatory case. He's been very thoughtful in explaining the process, expectations and challenges with such a case including undertakings and costs. With a case that is very challenging and tasking both through the process and emotionally to affected parties (conservativee and petitioner) involved, he was very supportative, went to task for you and walk you through each of the stages performed. from the many questions I had at all hours on the process to the challenges with the evolving situations, Kosta handled them swiftly, professionally and kindly. Kosta was highlyrecommended by several attorneys that I has consulted with and most importantly that he specialized in such elder abuse cases. The process has been lengthy and challenging, I have always felt truly confident in my selection of Kosta as my attorney. He successfully won the case in which the conservatees are now safe and secure -which I'm truly thankful for every day.
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Posted by anonymous | November 16, 2015
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Excellent and professional
Konstantine was very helpful and professional. He struck me as a genuine and honest person who cared about helping me with my tough situation. He was easily available for a consultation (I would've hired him if it were temporally possible). I would rate him 10 stars if I could!
Posted by Andrew de Vries, MBA - Licensed Real Estate Broker | August 17, 2015
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Probate, Estate and Trust Broker
Konstantine did a great job as the attorney for a professional trustee working to ensure that the sale of a piece of real property held in trust was sold for the mutual benefit of all beneficiaries involved while ensuring that all legal requirements were met.
Posted by MaryAnn | July 31, 2015
Konstatine Demiris
We were delighted with our experience with Konstatine Demiris. He possesses a great deal of integrity, and we found him to be resourceful, very knowledgeable, and meticulous in his handling of our estate. Moreover, he was courteous and willing to explain aspects of our trust with which we were unfamiliar. Mr. Demiris also gave us thoughtful advice about our assets and the implications of our decisions. He has an outstanding work ethic and is dedicated to providing the best service to his clients. My husband and I would highly recommend him.
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Posted by Derek | July 29, 2015
Mr. Kosta Demiris
I am writing this recommendation in regards to Mr. Kosta Demiris who represented my wife in a civil litigation case recently involving the settlement of her father’s estate. Over the past 9+ months Mr. Demiris has been the consummate professional, hardworking, dedicated, and most importantly has his client’s best interest at heart. Mr. Demiris controlled demeanor, confidence, and his wealth of legal knowledge regarding our case is to be commended. His strategy with our case was spot on and there is no doubt the very positive outcome we received would not have been possible without the formidable talents of Mr. Kosta Demiris. With that said, I highly recommend Mr.Demiris. If you are looking for legal consul to represent you and your best interests there is no better attorney than Mr. Demiris.
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Posted by Margaret | January 6, 2015
I recommend Konstantine Demiris
I found Konstantine Demiris to be reliable and assessible. His exceptional knowledge and ability to write compelling arguments were extremly valuable to me. He really cares about his clients and it shows in everything he does. I highly recommend Konstantine to anyone in need of an excellent attorney.
Posted by Tim | November 24, 2014
Thank You Kosta
I’m sure my father had no idea how hard it would be to be executor of his estate. I think we all think when we saw other families falling apart over inheritances that it could never happen to us. My father’s wishes were so simple and fair but from the beginning challenged. I was told by others to expect to have to give in just to settle his estate. But I put my trust in Kosta and in the end my father’s estate was settled just as he wanted it to be. Without Kosta I could never have fulfilled my father’s wishes. Everything he said he could do he did do. Besides being an excellent lawyer he is a very compassionate person that really went out of his way to help my wife and me through a very hard time.
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Cost

Rates
  • Free Consultation 30 minutes
  • Contingency 30%-40%
  • Retainer Sometimes
Payment methods
Cash, Check, Credit Card

Resume

AVVO RATING 10.0 (Superb)

Work Experience

  • Attorney
  • The Demiris Law Firm, P.C.
  • 2017 - Present
  • Partner
  • Demiris & Moore
  • 2013 - 2017
  • Attorney
  • B&B Attorneys
  • 2010 - 2013
  • Deputy County Counsel
  • California County Counsels Offices
  • 2006 - 2010
View all work experience

Education

  • Univ of California Berkeley
  • undergraduate
  • N/A
  • Santa Clara Univ SOL
  • law
  • N/A

Legal Cases

  • Heston v. Heston
  • Plaintiffs prevailed; trust was invalidated and Plaintiffs obtained monetary settlement
  • Estate of Barbara J. Heston
  • Plaintiff prevailed and was appointed executor
  • Estate of McGushin
  • Court ruled in favor of Kosta's client on all grounds
View all legal cases

Associations

  • Contra Costa County Elder Law Section
  • Board of Directors
  • 2015 - Present
  • Contra Costa County Bar Association
  • Member
  • 2010 - Present
  • Contra Costa County Estate Planning & Probate Section
  • Member
  • 2010 - Present
  • State Bar of California
  • Member
  • 2005 - Present
  • Contra Costa Barristers Association
  • President
  • 2015 - 2015
  • Conference of California Bar Associations
  • Delegate - Contra Costa County
  • 2015 - 2015
  • Contra Costa Barristers Association
  • Board of Directors
  • 2010 - 2016
View all associations

Languages Spoken

  • Greek
  • English

Awards

  • Rising Star
  • Northern California Super Lawyers
  • 2017
  • Rising Star
  • Northern California Super Lawyers
  • 2016
  • Rising Star
  • Northern California Super Lawyers
  • 2015
  • Rising Stars
  • Northern California Super Lawyers
  • 2014
  • Rising Star
  • Northern California Super Lawyers
  • 2013
View all awards

Publications

  • The Undergraduate Journal of the Department of Political Science, U.C. Berkeley, Politica (Spring 2003) Vol. 9 No. 1, pp 1-48.
  • Nuclear Weapons Science and Politics: the Interests of National Security and its Effects on the City of Livermore
  • 2003

Speaking Engagements

  • Eastern Alameda County Bar Association
  • Financial Elder Abuse
  • 2016
  • Thursday Advisor Roundtable
  • Legal System and Protecting the Elderly
  • 2015
  • Contra Costa County Bar Association
  • Get to Know Your CCCBA
  • 2015
  • CCCBA Law Student Mixer
  • Networking and Mentoring
  • 2015
View all speaking engagements

Attorney endorsements

Received (5)
Given (6)
Estate planning Attorney | Jul 27
Relationship: Fellow lawyer in community
"I endorse this lawyer."
Elder law Attorney | Jul 24
Relationship: Friend
"Konstantine is one of the best probate litigation attorneys I know. He is also extremely well versed in all aspects of elder law. He is one of my go to colleagues when I have an elder law issue and have referred him cases in the past. Each one has come back with positive feedback. I would not hesitate to recommend him in the future. He's a great attorney who is passionate about the community (he volunteers with elders at care homes), the legal community (a former member of the Inn of Court), and really takes care of his clients. I strongly recommend him."
Elder law Attorney | Jul 24
Relationship: Fellow lawyer in community
"I have known Kosta for over 5 years. We have worked together on several county bar projects and I have referred several individuals and other attorneys to him. On the projects that we have worked on, I am impressed with his diligence and effort to help get the project completed. Individuals who I have referred to Kosta have all told me that they were happy with him."
Elder law Attorney | Jul 23
Relationship: Opposing Counsel on matter
"I've known Konstantine "Kosta" Demiris for many years in the local Contra Costa elder law lawyer community. I have litigated matters against him, but also worked on complex family cases with him. Elder law cases are rarely black and white and he is quickly able to grasp the nuances of each case. I have enjoyed working with/against him on matters, because he is a straight-forward, hard-working attorney who moves matters forward quickly. Even when he represents a party directly opposite to yours, he does so with professionalism and respect. He is good at communication and help facilitate communication between warring parties. He also represents professional fiduciaries, so I often contact him to see if we can work with one of his clients on complex matters. If a family is unable to work together, it can sometimes make sense to bring in a neutral third party to administer the matter. Kosta assists with the legal process there."
Trusts Attorney | Jun 29
Relationship: Fellow lawyer in community
"Konstantine "Kosta" Demiris, of Demiris & Moore, is as savvy as they come and he will work tirelessly to obtain the best result achievable for his clients. If you are anywhere in the Bay Area and have a Will, Trust & Estates, or Family Law matter, you owe it to yourself to have a consultation with the firm of Demiris & Moore. They are fearless advocates for their clients and are highly respected in the legal community."
Estate planning
Administrative law
Criminal defense

Avvo Contributions

This attorney hasn't created any legal answers in Q&A or legal guides recently on Avvo.

Walnut Creek Litigation Lawyer Konstantine Antony Demiris
Konstantine Antony Demiris
Litigation Attorney
Walnut Creek, CA
Licensed for 17 years
Free Consultation