the Market opened, Hyatt cut back its room-service hours. The Grand Hyatt installed several green building features in early 2016, including a new exhaust-control system, LED lighting, and an updated HVAC system. In addition, as part of the development of the nearby One Vanderbilt skyscraper, the subway station under the hotel was renovated in the late 2010s. The project involved relocating several of the hotel's support columns, demolishing 40 percent of the Hyatt's basement to expand the subway mezzanine, and expanding a subway entrance within the hotel's base. Project Commodore The New York City government enacted the Midtown East rezoning in the 2010s; this allowed developers to transfer unused air rights from Grand Central Terminal to neighboring sites, enabling the construction of high-rise buildings on these sites. Developers expressed interest in redeveloping several sites around the terminal, including the Grand Hyatt. In February 2019, the media reported that TF Cornerstone, MSD Partners, and RXR Realty planned to redevelop the Grand Hyatt site. A new mixed-use structure with office and retail space, as well as a smaller hotel, would be built on the site. The proposal required approval from the state and city governments of New York, though no final agreement had been signed. Before the developers could construct the skyscraper, they had to buy out Hyatt's lease, which ran through 2077. At the time, the developers planned to close the hotel permanently after the end of 2020. In November 2020, preliminary plans for an 83-story mixed-use tower on the site, known as Project Commodore, were revealed. The tower, designed by T. J. Gottesdiener of Skidmore, Owings & Merrill, would be tall, making it the second-tallest in New York City if completed. The structure would contain office space on the 7th through 63rd floors and a 500-room Grand Hyatt hotel on the 65th through 83rd floors. The basement, first, and second floors would contain retail, and the first floor would also connect to the adjacent railroad terminal and subway station. A public plaza and a stair to the Park Avenue Viaduct would also be built. If the project were approved, the demolition process would take 18 months, and the construction process would take 47 months with a preliminary completion date in 2030. Preliminary renderings were released in February 2021, and the New York City Council approved the plans that December. The developers still planned to demolish the hotel in 2023. Temporary