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4.7 58 reviews

Butler minor

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12 Feb, 2019
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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Jamie d

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25 May, 2018
Just met with Kosta and have referred him in confidence that he cares about his clients. He fights for his clients and his greatest reward is doing a great job for clients who have been wronged, and generally from family members. Spending time with Kosta you can see right away he acts with integrity and honesty.
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Natasha kumar

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22 May, 2018
Mr. Kostantine Demiris is very intelligent, knowledgeable, and precise in his approach, as an attorney. Having him alongside as my lawyer, has so far been one of the best choices I have made. Mr. Kosta went above, beyond and out of his way, in representing me. First, his legal writing is concise and very clear and second, his cross exam skills in the court room is just great. I am very impressed by his presentation skills. He effectively argued our case and won it for us! Mr. Kosta took on another tough case for us and in the trial, it was clear how thoroughly he had prepared. He provided strong presentation in the courtroom. He won the judge's respect and made our case convincingly. Mr. Kosta won both my case !!!  HE IS THE BEST PROBATE/ESTATE ATTORNEY IN THE BAY AREA. I highly recommend Mr. Kostantine to anyone in need of a conservatorship lawyer for his expertise.
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Rodrigue herico

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17 Apr, 2018
The best lawyer when it comes to family law. He’s very respectful and very thoughtful. He has an awesome crew who worked tirelessly to help my family’s concerns. He’s an honest lawyer who doesn’t give false assurances. I’m truly grateful for having Atty Demiris and his group of great lawyers to represent my family
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Francesco isolani

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11 Dec, 2017
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François emaleu

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20 Mar, 2017
Peace of mind attorney
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Imogene reber

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11 Mar, 2017
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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Susan mulder

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18 Feb, 2017
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. Kostas 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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Steve kau

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16 Jul, 2015
David is very knowledgeable and has helped me in my representation with clients before the IRS. I refer my clients to him for advice on bankruptcy.
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Andrea wright

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29 Nov, 2012
David an staff was very professional and organized, great communication skills. They thoroughly walked me through the process and relieved all my anxiety. This process was very straight forward from beginning to end. David Arietta Law Firm is highly recommended and the price was right. Will definitely send folks your way. once again thank you.
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