666 Park Avenue’s reinvention is finally coming to fruition, although not under the watch of Kushner Companies, but that of Brookfield Asset Management. Brookfield has unveiled a new look for the dated 1958 Midtown building in a series of renderings that depict a glassy new sheath and generous stretches of landscaped outdoor terraces. The glass exterior, Brookfield highlights, will be the largest unitized window in North America. But perhaps more notably, the office tower will have a new address, 660 Park Avenue, and an opportunity for a tenant to put its name on the building.

The interior of the structure will also see a major revamp courtesy of Kohn Pedersen Fox Associates. A new lobby and ground floor retail will be added, and the existing office space modernized to offer double-height spaces with floor-to-ceiling windows and interconnected floors. The upgrades are estimated to reduce the building’s carbon footprint by 54 percent.

Previous visions for the Midtown building have included razing the site and erecting a 1,400-foot, Zaha Hadid-designed luxury hotel and apartment tower in its place. The plan was rejected by Vornado Realty Trust—which then owned a 49.5 percent stake—in 2017 in favor of more modest updates that would keep the tower’s use as office space.

Although Kushner Cos. eventually purchased Vornado’s share back in 2018, it ceded the 99-year ground lease to Brookfield that same year for $1.29 billion—a move that pulled the property out of debt. The transaction effectively gave Brookfield full ownership of the building, and the company now has control over leasing, operations, and development.

Brookfield's overhaul will cost $400 million and work is expected to be completed in 2022.