Stuart Mass devotes substantially all of his professional time to commercial real estate leasing transactions. He specializes in the office, retail and ground leasing of high-end properties in the prime business districts of Manhattan and the neighboring New Jersey Gold Coast, and is often called upon to assist landlords and tenants in the early stages of structuring complex transactions.

Stuart is routinely involved in several of the largest leasing transactions that take place each year in New York City, representing major landlords, such as Brookfield Office Properties, L&L Holding Company and SL Green Realty Corp., and prestigious tenants, such as Citigroup, Lazard Group LLC, and Soros Management Fund. He 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, most recently, the MBA program at Columbia University. Stuart has been recognized by publications such as Chambers Guides to the World's Leading Lawyers and Super Lawyers.

Since joining Haynes and Boone in late June 2010, Stuart has served as the lead counsel or supervising attorney in completed and ongoing leasing transactions covering more than 2.5 million square feet of prime office and retail space in midtown and lower Manhattan.

Representative transactions include:

• Representation of 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;
  
• Long-term representation of the landlord in leasing the retail and restaurant establishments in downtown Manhattan's premier office complex;
  
• 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; and
  
• Representation of landlords in several significant and complex subleasing transactions providing for the ultimate creation of a direct landlord/tenant relationship following the expiration or earlier termination of the sublease.

Selected Representative Experience