Glen Seator, 46, a highly regarded sculptor who became known in the 1990s for work that replicated architectural situations with uncanny verisimilitude, died Dec. 21 at his home in Brooklyn, N.Y. He was working on the chimney of his house when he fell to his death, said his sister, Patricia Seator.

Mr. Seator created works that blended realism and surrealism, and commented on social issues. In 1999, he transformed the Gagosian Gallery in Beverly Hills, Calif., into a check-cashing store, painstakingly replicating the street facade and interior of a business in a Latino neighborhood on Sunset Boulevard.