NEW YORK CITY-The New York City Chapter Alzheimer’s Association will double in size at its longtime home of 360 Lexington Ave., says brokerage firm Cassidy Turley. After considering other options in the neighborhood, the nonprofit will expand from 15,000 square feet to 30,400 square feet for a 15-year term inside the building.

Under the terms of the deal, landlord AEW Capital Management extended the chapter’s existing fourth floor lease beyond its original 2016 expiration date for an additional 10 years in exchange for leasing the entire third floor for 15 years. “It speaks volumes about the quality of the owner,” David L. Hoffman, executive managing director and principal at Cassidy Turley tells GlobeSt.com. “It gives tenants a lot of comfort about remaining in buildings like that knowing they are going to be cared for by the owner. That had a lot to do with it.”

Hoffman represented the owner along with vice chairman Robert Billingsley and managing director Wendy Miller at Cassidy Turley. The tenant was represented by David Kaplansky at Jones Lang LaSalle.