About Us

The Diamond Law Group is a Long Island, New York real estate law firm dedicated to providing efficient and professional service on a personal level.

OUR ATTORNEYS

Partners

Managing Partner

Richard Klein

Richard David Klein, Esq. joined the Diamond Law Group in 2002 while attending Touro College Jacob D. Fuchsberg Law Center, in Huntington, New York at night. He was admitted to practice law in New York in 2007, concentrating on transactional real estate law, including representation of buyers, sellers, and lenders. He has personally mentored most…

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Richard Klein

Managing Partner

Jonathan Bellezza

Jonathan P. Bellezza, Esq is a 2013 graduate of Touro College Jacob D. Fuchsberg Law Center, in Central Islip, New York. He was admitted to practice law in New York in 2014 and is the newest partner at the firm as of 2017. His drive, professionalism, and attention to detail allowed him to make partner…

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Jonathan Bellezza

Of Counsel

Frank Castiglione

Received his Bachelors of Science/Bachelor of Arts Degree from Georgetown University in 1983 and his Juris Doctor Degree from St. John’s University School of Law in 1993, and is admitted to practice law in both the state of New York and New Jersey, as well as the United States District Court, District of New Jersey…

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Frank Castiglione

Our Paralegals

Elite Paralegal

Danielle Venturino

Danielle Venturino joined Diamond law Group in July of 2020. She is a new graduate from hofstra university with a double major in criminology and psychology. She has future aspirations to attend law school and pursue a career as an attorney. During her free time she enjoys to draw / sketch, go to the beach,…

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Danielle Venturino

ATeam Paralegal

Delia Young

Delia Young joined the Diamond Law Group team in 2015 as Richard Klein’s paralegal. She assists with all aspects of the firm’s residential real estate transactions. Delia received her bachelor’s degree from Stony Brook University with a major in Psychology and a minor in Political Science. She furthered her education at Hofstra University where she…

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Our Firm Founder

Founding Partner

Mitch Diamond

Mitch is the Founder (retired) & General Counsel Emeritus of Diamond Law Group. Mr. Diamond has been practicing in the area of Residential Real Estate exclusively for 20 years.   His expertise has evolved over the past two decades through helping Buyers and Sellers navigate through their Home Purchases and Sales.   Coming from a restaurant background and…

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