Peter Caldwell was the designer on 175 episodes of Coronation Street from December 1963 to May 1965 with further stints in the role from September to November 1966 and May 1967. He was the second person to work in the role on the programme after its initial designer, Denis Parkin, who had first created the world of the Weatherfield from the scripted descriptions and visits to the terraced streets of Salford.
Among his other work as a staff designer for Granada Television were sets for Skyport, Knight Errant Limited, The Man in Room 17, The Fellows, City '68 and The Dustbinmen. In the early 1970s he moved to Yorkshire Television where his work could be seen on Beryl's Lot, Wilde Alliance and the comedies Rising Damp, Hallelujah! and In Loving Memory.