Credit Vincent Tullo for The New York Times
On a cold weekday afternoon on an upper floor of one of his Chelsea galleries, the art dealer David Zwirner pointed out the window at a corner lot on West 21st Street that is under demolition.
That, Mr. Zwirner said, is the site of what in the fall of 2020 will become the new heart of his New York operation: a five-story, $50 million gallery designed by Renzo Piano.
Mr. Zwirner is announcing this plan for the future even as he is looking at the past — with a 25th-anniversary exhibition featuring the artists who have shaped the gallery’s program since its founding. He is also celebrating the present with the inauguration this month of his first Asia gallery in Central Hong Kong.
“As fortune favors the brave, we are looking back exactly when we’re opening in Hong Kong and looking forward,” Mr. Zwirner said.