 Chadwick was appointed a Commander of the Order of the British Empire in the 1943 Birthday Honours for his contribution to the design of the Lancaster and in particular for the adaptations he made to it in preparation for the low-level attacks on the German dams, during the Dam Busters raid Operation Chastise.The same year he was granted the Honorary Freedom of the City of London.He is commemorated by a blue plaque on the surviving office building of the Avro factory at Greengate.