Brisbane hired Emery Roth to design an apartment hotel on the site in 1924. That September, Roth publicized plans for a residential structure at 465 Park Avenue, which would be taller than any other building north of 42nd Street. The plans called for a 30-story building with 358 rooms, 165 bathrooms, 135 kitchens, a restaurant, a bank, and art galleries and exhibition space. The apartment tower would have had 144 two- and three-room units on the third through 18th floors, as well as a setback at the 19th floor to serve as a terrace for Brisbane's duplex on the 19th and 20th floors. The 21st through 24th floors would have contained two- and three-room units; the 25th through 28th floors, duplex studios; the 29th floor, a duplex apartment; and the 30th floor, a penthouse apartment. The "Diana" sculpture from Madison Square Garden was to be placed on the roof. At some point afterward, Thomas Hastings was hired for the project, for reasons that were not clearly publicized.