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William S. Gillen began his legal career as an Associate at a boutique New York City law firm specializing in estate planning and administration, elder law, special needs planning and real estate transactions. In 2009, William established a private practice focusing on estate planning, probate and estate administration, special needs planning, guardianship and real estate transactions.
His practice also includes serving as a Guardian ad Litem in Surrogate's Court Proceedings and as Court Evaluator and Counsel to Alleged Incapacitated Persons in NYS Supreme Court Guardianship Proceedings. William is Vice President of the Bay Ridge Lawyers Association and is also an active member of the Brooklyn Bar Association, Richmond County Bar Association and New York State Bar Association. He is also an active member of the Rotary Club of Verrazano.
He obtained his law degree from New England Law Boston, where he competed nationally as a member of the Tax Moot Court. During law school, he held internships at the Massachusetts Appellate Tax Board and the Richmond County Surrogate’s Court. William received a B.S. in Accounting from Fordham University. He attended Fordham on a scholarship from J.P. Morgan Chase where he worked in Corporate Tax.
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Practice Areas
19 years
19 years
19 years
19 years
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Chat withState: New York
Acquired: 2008
No misconduct found
State: New Jersey
Acquired: 2007
No misconduct found
440 89th Street, Suite 3A, Brooklyn, NY, 11209
888 Forest Avenue, Staten Island, NY, 10310
29 Client Reviews
Showing 1 - 5 of 10 reviews | Recommendation
Posted by Daniel | July 16, 2025 | Real Estate
Reliable and pleasant to work with.
As a real estate broker I have confidently recommended Will Gillen as a go to attorney for my clients without hesitation. Working with Will and Christina ensures a smooth transaction no matter what issues may arise throughout the buying and selling process. Responsive, intelligent, and always with pl...
Posted by Paula | April 29, 2024 | Hired Attorney | Real Estate
The best in Brooklyn probably the world
We worked with Will on the sale and purchase of 2 properties in Brooklyn. He was already readily available for all our questions and to walk us through documents and procedures that were new to us. He was the upmost professional in a particularly challenging closing conversation and has always been o...
Posted by anonymous | January 14, 2022 | Hired Attorney | Real Estate
Thank you, Will! You are the best attorney we've worked with!
Wife and I just sold our house in Brooklyn from our new home in California. Will was hands down the best attorney we've worked with and he made the process clear and easy, from start to finish - this was made especially challenging given COVID and being across the Country. Will had our confidence fro...
Posted by William | June 04, 2019 | Hired Attorney | Real Estate
Skilled real estate professional
Had an excellent experience. He handled last minute problems that inevitably popped up, right to the morning of the closing, masterfully. Always responsive to our questions and concerns. Will certainly use him again for future real estate transactions.
Posted by Shai | March 03, 2019 | Hired Attorney | Real Estate
Outstanding Service
I would highly recommend Will to friends and family. He was knowledgeable, attentive and consistently went above and beyond to ensure my successful real estate closings.
"Outstanding attorney. I endorse this lawyer 100%. William has the perfect blend of professionalism, kindness, and experience. He's driven to going the extra mile and getting the best results for his clients. He's definitely one of the best I know"
Trusts lawyer
2019 - Present
Principal Attorney, The Law Offices of William S. Gillen
2012 - 2019
Partner, Gillen Scali, PLLC
2009 - 2012
Principal Attorney, The Law Offices of William S. Gillen
2011 - Present
Bay Ridge Lawyers AssociationPast President and Board Member
2007
JD - Juris Doctor
2004
BS - Bachelor of Science
English
Legal Answers
In Suffolk County , NY: ( 1) Is an executor of an Estate required by law to answer questions by beneficiaries?
18 May 2014
A property owned by John Doe and Jane Doe, as his wife as shown on the Deed. John Doe, passed away without a last will.
16 May 2014
Should I add my daughter's name to the deed of my home?
21 Apr 2014