By 2001, the NYCTA planned to temporarily reopen the station three years later for the subway's 100th anniversary. The station was listed on the National Register of Historic Places in 2004. For the subway's Centennial Celebration the same year, one of the street entrances was restored, and the station was opened for the duration of the celebration. Other than that, the station was used only as an emergency exit. By the mid-2000s, the staff of the Transit Museum were again conducting tours of the station; only NYTM members were allowed on these tours. Unlike other abandoned New York City Subway stations, there was generally little graffiti or dust in the City Hall station. The station remained in good condition in 2019, though only one of the original skylights remained. Due to the COVID-19 pandemic in New York City, the NYTM suspended its tours of the station between 2020 and 2023.
