Stuart Mass


Education and Clerkships

J.D., Fordham University School of Law, 1983, cum laude; Editor-in-Chief, Fordham Law Review

M.A., Fordham University, 1980

B.A., City of New York Brooklyn College, 1973


New York


Stuart Mass is routinely called upon by prominent property owners and world-class business enterprises to guide them in high-profile leasing transactions in the prime business districts of Manhattan and the neighboring New Jersey Gold Coast. Under Stuart’s leadership in New York, Haynes and Boone has assembled a unique team of qualified attorneys regarded by many as one of the premiere real estate leasing groups in all of New York.

Stuart’s practical approach and productive relationships with leaders of his peer group have enabled him to successfully navigate some of the largest leasing transactions in New York City, representing major landlords, such as Brookfield Office Properties, SL Green Realty Corp. and Fisher Brothers, and prestigious tenants, such as Lazard Group LLC, Soros Management Fund and Cushman & Wakefield. Stuart’s comprehensive understanding and appreciation of the business objectives of his clients aims to provide them with a sense of comfort, and the ability to focus on other matters that demand their attention.

Over the course of his career, Stuart has been recognized by publications such as Chambers USA, Chambers & Partners, 2011-2016; New York Super Lawyers, Thomson Reuters, 2010-2016; The Best Lawyers in America, Woodward/White, Inc., 2013-2017; and was AV® Peer Review Rated Preeminent by Martindale-Hubbell® Law Directory. And Stuart has lectured on leasing topics for the Association of the Bar of the City of New York, the Real Estate Board of New York and the MBA program at Columbia University.

When he is not attending to work on behalf of firm clients, Stuart serves his community as a Village Justice for the Village of Muttontown, New York.


Super Lawyers

Haynes and Boone Recognized in 2016 New York Super Lawyers Directory

Haynes and Boone practitioners have again been recognized as New York Super Lawyers and Rising Stars, published by Thomson Reuters. Super Lawyers and Rising Stars rate outstanding lawyers from more than 70 practice areas who have attained a high degree of peer recognition and professional achievement.

Selected Client Representations

  • Representation of a world-leading law firm in the negotiation of its NY headquarters lease.
  • Representation of the landlord in a 1.2 million square foot office lease in Manhattan.
  • Representation of a world-class financial institution in its long-term headquarters lease for approximately 440,000 rentable square feet in midtown Manhattan.
  • Long-term representation of the landlord of a nearly 2 million square foot Park Avenue building, including two office leasing transactions in excess of 500,000 square feet and one office leasing transaction in excess of 200,000 square feet.
  • Renewal and modification of an approximately 1.3 million square foot office lease in midtown Manhattan.
  • Long-term representation of a landlord of prominent, downtown New York City office properties with respect to two buildings comprising approximately 5 million square feet, including several leasing transactions ranging from 200,000 square feet to more than 500,000 square feet.
  • $1 billion sale of a Park Avenue office building and the contemporaneous leasing back by the seller of nearly 700,000 square feet of office and retail space.
  • The "sandwich" ground leasing of a prime Park Avenue office building.
  • Negotiation of three leases covering approximating 900,000 square feet of office space in midtown Manhattan in connection with the merger of two world-class music businesses.
  • Appointment as an arbitrator in a dispute regarding the pass-through to a tenant of a multi-million dollar increase in the cost of terrorism insurance.


Chambers USA | Haynes and Boone, LLP

Haynes and Boone Retains Strong Showing in Chambers USA 2016 Rankings

Haynes and Boone, LLP has again been honored in the annual Chambers USA 2016 directory. The widely-respected legal publication singled out 19 firm practice groups and 51 individual lawyers for recognition.

Published by Chambers & Partners in May 2016

Professional Recognition

  • Recognized by Chambers USA, Chambers & Partners, for Real Estate in New York, 2011-2016
  • Recognized in The Best Lawyers in America, Woodward/White, Inc., for Real Estate Law, 2013-2017
  • Recognized by New York Super Lawyers, Thomson Reuters, 2010-2016
  • AV® Peer Review Rated Preeminent by Martindale-Hubbell® Law Directory

Email Disclaimer