 Along with Peter Shepheard, he created an influential design for Stevenage, the first post-war British new town, which incorporated a pedestrianised town centre.In 1953, he was commissioned by the state government of Western Australia to produce a plan for the metropolitan area of Perth and Fremantle.The resulting 1955 "Plan for the Metropolitan Region" was co-authored with Alistair Hepburn, and is commonly known as the "Stephenson-Hepburn Report".