CHICAGO — The Adler School of Professional Psychology has signed a 15-year lease for 100,796 square feet of office space at One North Dearborn Street in Chicago. The leased space includes the entire 15th and 16th floors as well as 2,500 square feet of ground-level space. The school plans to begin occupying the space on January 1, 2011. OWP/P Cannon Design is providing architectural services for the tenant build-out project, while Leopardo Cos. is serving as the general contractor. Phil Utigard and Scott Becker of Transwestern represented the Adler school; Kevin Purcell and Gary Denenberg of MB Real Estate represented the building ownership in the transaction.