Denington was born Evelyn Joyce Bursill in 1907 to Philip Charles Bursill and Edith Rowena Montford. She was educated at Blackheath High School, Bedford College and Birkbeck College, where she attended evening classes. In 1927, she became an editorial assistant at Architecture and Building News, leaving in 1931 to retrain as a teacher. Denington became secretary to the National Association of Labour Teachers, and taught in London junior schools until 1950.
Marriage
She married Cecil Dallas Denington, a stockbroker's clerk but later a schoolteacher, in 1935.
Politics
She, and her husband, were elected to St Pancras Borough Council in 1945, serving until 1959. She was also elected to the London County Council in 1946, representing St Pancras North, and continued to served on its successor, the Greater London Council. She served as a member of the Stevenage Development Corporation from 1950. She became its chair and a Commander of the Order of the British Empire in 1966, continuing as chair until the Corporation was dissolved in 1980. During her time as a member of the Corporation, Stevenage town centre became Britain's first pedestrianized town centre. The local art gallery was named after her, and she became an honorary fellow of the Royal Institute of British Architects and an honorary member of the Royal Town Planning Institute. Denington became a member of London County Council's new and expanding towns committee, and served as chair of the design subcommittee. Following the creation of the Greater London Council, she became chair of the housing committee with responsibility for around 200,000 homes. During opposition, she became Labour's deputy leader on the Council, before serving as chair of the transport committee from 1973 to 1975, establishing free buses for pensioners. In 1974, she was promoted to Dame Commander of the Order of the British Empire, and from 1975–76, she became chair of the Greater London Council. She retired from the Greater London Council in 1977 and was created a life peer as Baroness Denington, of Stevenage in the County of Hertford, on 10 July 1978.
Death/legacy
She and her husband retired to Hove and they had no children. She died of heart failure on 22 August 1998 in Brighton, aged 91. Evelyn Denington Road in Newham, London was named in her honour.