The 40-cover restaurant, which launched in 2014 on the site formerly occupied by Nuno Mendes’ Michelin-starred Viajante in the Town Hall Hotel, will close on 30 June.
The space will be repurposed, and will not be occupied by a new restaurant, as the hotel already houses the Corner Room restaurant, overseen by head chef Craig Johnson.
“I’d like to take this opportunity to thank everyone that has helped us achieve amazing things over the years. This includes all our wonderful guests, suppliers and friends,” says Westcott in a statement issued by the hotel.
“Although a little sad, I’m also looking forward to exploring other culinary options and getting stuck in exciting projects in the future.”
On Twitter the chef added: “It’s exciting news…new chapter ahead.”
Westcott cut his teeth under Tom Aikens at his eponymous two Michelin-starred restaurant in Chelsea, and rose to prominence after making an appearance on The Great British Menu.
The Typing Room, which was initially backed by Jason Atherton, was awarded four AA Rosettes (out of a maximum of five), and restaurant critic Fay Maschler gave it four stars in her review in the Evening Standard. It also appeared in Restaurant's list of the top 100 places to eat in the UK in 2015.