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William Salvatore Gillen

Trusts Attorney at Brooklyn, NY

5.0   17 reviews
  • State Years
    New York - NY 15 years
    New Jersey - NJ 16 years
  • Licensed for 15 years
    State NY
    Acquired 2008
    Currently Registered No misconduct found
  • Licensed for 16 years
    State NJ
    Acquired 2007
    Resigned Without Prejudice No misconduct found

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

About William

Learn William’s areas of practice.

Practice areas

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.


The Law Offices of William S. Gillen
440 89th Street, Suite 3A
Brooklyn, NY, 11209
William Salvatore Gillen
888 Forest Avenue
Staten Island, NY, 10310
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5.0 / 5.0
  17 customer reviews
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Posted by Linda | August 19, 2022
This review is from a person who hired this attorney.
| Hired Attorney
A+ experience
I highly recommend Will! He truly knows his stuff and he combines his deep knowledge of the law with a great personality. He made the experience of creating our trusts and wills very smooth and comfortable. His prices are also very reasonable. I can't say enough good things about him.
Posted by anonymous | January 14, 2022
This review is from a person who hired this attorney.
| Hired Attorney
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 from the first minute and kept it throughout the closing - and he came with a very strong recommendation from our broker, so his reputation is known widely across the Brooklyn market. Thank you, Will, for making a challenging experience a pleasure. If we have real estate attorney needs in NY again, we will be coming back to you. Thank you!
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Posted by Kevin | July 2, 2020
This review is from a person who hired this attorney.
| Hired Attorney
Fantastic experience with Will
Will helped us to close on our first home during a global pandemic - the most stressful thing I've ever done - but working with Will was probably the easiest and most pleasant part of it. He was down to earth, easy to talk to, genuine, super informative and professional, and also humorous and fun to work with. I look forward to working with again on our next home some day.
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Posted by Mohamed | June 2, 2020
This review is from a person who hired this attorney.
| Hired Attorney
Mission Impossible.
Even with the Covid-19 circumstances and the unfortunate shut down In New York State, William was able to find a way to close on the property I was selling on time. He’s devoted, knowledgeable and responsive whenever I Left him a message or had a question. I would Very highly recommend William Gillen. Excellent service.
Posted by Meggie | July 19, 2019
This review is from a person who hired this attorney.
| Hired Attorney
Will was thorough and knowledgeable throughout our mortgage loan process!
Will was amazing to work with. He was always in contact with us during our mortgage loan process. Since this was our first home purchase, he had to explain everything to us which was done thoroughly. He also made recommendations to us throughout the process and we took his advice and we are happy that we did.
Posted by William | June 4, 2019
This review is from a person who hired this attorney.
| Hired Attorney
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 jerry | March 9, 2019
This review is from a person who hired this attorney.
| Hired Attorney
great real estate lawyer
Willam represent us as seller's lawyer in 2018. He is really experienced real estate lawyers, He never tired to answer your question and concern and protect you interest.
Posted by Shai | March 3, 2019
This review is from a person who hired this attorney.
| Hired Attorney
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.
Posted by Paul | December 3, 2018
This review is from a person who hired this attorney.
| Hired Attorney
Skilled help on multiple fronts
Will was a godsend on two issues related to my elderly mother. The first involved providing expert consultation on our options for protecting her assets were to face the need for expensive longterm care in a nursing home. He spent 90 minutes with us at no charge, explaining clearly and concisely what our choices were and what the relative merits/demerits were to each. He saved me hours of web searching that almost certainly would have resulted in a flawed understanding. Instead, I was clear and new exactly what next steps should be. As it turned out, we didn't retain Will to take those steps because we unexpectedly took advantage of an opportunity to move my mother closer to my sister in New Jersey. We turned to Will to serve as our real estate attorney and he brought the same level of competence, attention to detail, and client support to this task. He made the entire process effortless. I can't recommend him highly enough for either elder care issues or real estate matters. Were my mother still in New York, he'd be our go-to guy. I can't imagine anyone more competent, more reasonable in terms of expense, or more pleasant to deal with.
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Posted by Linda | November 19, 2018
This review is from a person who hired this attorney.
| Hired Attorney
It was great working with Will, who managed the sale of our house. In addition to be responsive to questions and requests he was proactive in getting all necessary work done in a timely fashion. Because of his competence and great organization skills the house closing went so smoothly. He's a winner and I highly recommend him.
Posted by Danny | October 16, 2018
This review is from a person who hired this attorney.
| Hired Attorney
Handled the purchase of our home and wrote our wills.
My family retained Will to represent us through the purchase of our first home and to write our wills, living wills and heath care directives. (Glad we have them but hope we don’t need them!) Will was thoughtful, detailed and attentive and we are very happy with him. We were in contract to purchase our home for months and had multiple issues arise during the process. Luckily, we had Will and he resolved those issues and made the stressful home buying process much better. All in all, Will is a knowledge, experienced and competent attorney who is accessible and has fair prices. We plan to retain his services again in the future as needed and recommend him without reservation to others in need of legal representation.
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Posted by Alan | October 16, 2018
This review is from a person who hired this attorney.
| Hired Attorney
Second to none!
I hired Will as my attorney for purchasing a cooperative apartment. He was nothing short of professional and knowledgeable at assisting me through the process. Pays attention to detail and always keeps me in the loop of things that need to get done. I would highly recommend him to anyone looking to purchase a new home.
Posted by Jonathan | January 30, 2018
This review is from a person who hired this attorney.
| Hired Attorney
Patient & Attentive
During the fall of 2017 I had the good fortune of working with William as we tried to secure our first apartment in New York City. This task was made more difficult by the fact that I was working and living in Japan at the time. The process required much more correspondence and patience than might ordinarily be expected from an attorney as I am a first-time buyer living in a completely different time zone. Still, William made the process feel as natural as possible and was available to exchange a great many e-mails and speak via Skype during times that were less than ideal for a lawyer operating out of New York. William was also pragmatic in his approach, and helped us consider how other people involved in the process were behaving in ways that we hadn't considered (especially the banks). I highly recommend William for anyone looking to secure real estate in the New York area. Thanks again for all your time and hard work.
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Posted by Lisa | January 17, 2015
Love my Lawyer...
William S. Gillen, Esq. was highly recommended to me as I needed an Estates Lawyer. He is a true professional. He is quite brilliant, sensitive and quit-witted. His calm, boyish demeanor, along with is shrewd law tactics, always leaves me confident and comfortable knowing he gets MY job done. I highly recommend him!
Posted by Rosalba | April 23, 2014
A very happy client !
I met Mr. William Salvatore Gillen at a time in my life that was not a very happy one. Not only was he professional & knowledgeable but understanding, caring and patiente. Qualities which come natural to Mr. Gillen I have highly recommended him to my family and friends and will continue to do so.
Posted by Anthony | April 22, 2014
Attorney and Trusted Advisor
Mr. Gillen recently helped me navigate through two very complex closings and a family-related matter and did an outstanding job on all. In addition to having a deep breadth of legal expertise, William operates as a trusted and responsive personal advisor you can rely on. You will be hard-pressed to find an attorney as competent, honest and passionate as William.
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Posted by Mary Beth | April 21, 2014
Mr. William Gillen was my attorney for taking my home out of trust, the closing of my home, and creating my will. Mr. Gillian stands out in terms of professionalism, proficiency, efficiency, and overall intellect. In addition, his phenomenal responsiveness and other qualities take client service to an exceptional level. It is a pleasure to work with Mr. Gillen.
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AVVO RATING 7.5 (Very Good)

Work Experience

  • Principal Attorney
  • The Law Offices of William S. Gillen
  • 2019 - Present
  • Partner
  • Gillen Scali, PLLC
  • 2012 - 2019
  • Principal Attorney
  • The Law Offices of William S. Gillen
  • 2009 - 2012


  • New England School of Law
  • JD - Juris Doctor
  • 2007
  • Fordham University
  • BS - Bachelor of Science
  • 2004


  • Bay Ridge Lawyers Association
  • Vice President
  • 2011 - Present

Languages Spoken

  • English

Attorney endorsements

Received (1)
Given (1)
Endorse William
Trusts Attorney | Jul 13
Relationship: Worked together on matter
"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"