 In October 2019, Brookfield announced plans to rename the building 660 Fifth Avenue and begin $400 million of renovations in late 2020 after the remaining tenants' leases expired.Plans, designed by architecture firm Kohn Pedersen Fox, included eliminating many of the building's interior columns, offering double-high ceilings, adding four exterior terraces, and replacing the building's aluminum cladding with floor-to-ceiling windows.Upon completion of the renovations in 2023, Brookfield expected to achieve rents of over $100 per square foot, some of the most expensive office rents in all of New York City.