After the war, Piper continued to record the English countryside in his paintings, as well as writing on art and architecture. In 1948, he painted the decorations of the British Embassy in Rio de Janeiro, and in 1951, he collaborated with Osbert Lancaster on the design of the Battersea Pleasure Gardens. He also designed stained glass windows for a number of buildings, most notably for Coventry Cathedral in 1958. From 1946-52 and again from 1954-61, Piper was a trustee of the Tate Gallery, as well as a member of the Arts Council panel for five years from 1952. Piper died at his home in Fawley Bottom in 1992.