CONSTRUCTION IN THE TIME OF CORONAVIRUS: Coronavirus could soon topple one of NYC’s most luxurious new supertowers.

One of the tallest residential buildings in the nation, 111 W. 57th St., is just weeks away from missing its construction deadline, known as an “outside date,” thanks to years of delays and the construction moratorium caused by the COVID-19 pandemic.

If that happens, in-contract buyers could — and likely would thanks to coronavirus fears and an abysmal stock market — walk away with their deposits, leaving the $1.45 billion development empty.

Plus: “Just about any luxury condo in New York — whether it’s complete, almost complete or partly complete — is in the same boat right now: It’s frozen.”