Steven William Prestwich was born in Liverpool, England in 1954. He was a member of the folk/rock band, Sandy, in 1970 in the United Kingdom. His family relocated to Adelaide, South Australia in 1971 when he was aged 17. He was a member of Elizabeth band Ice with bassist Michael Smith and guitarist John Pryer from 1971 to 1973. In 1973, he was the founding drummer for heavy metal group Orange with the line-up of Jimmy Barnes, Ian Moss, Don Walker and Leszek Kaczmarek. Orange evolved into pub rockers, Cold Chisel in 1974 and Prestwich remained a member until early 1983. During his time in Cold Chisel, Prestwich wrote "When the War Is Over" and "Forever Now". Both songs appeared on their 1982 album, Circus Animals. He co-wrote with Walker the song Flame Trees from the 1984 album Twentieth Century. He briefly rejoined Cold Chisel for their Last Stand Tour from October until the group's final show on 12 December 1983. Prestwich joined the Australian group, Little River Band (1984–1986) toured the United States and released two albums with them. Little River Band recorded "When the War is Over" with John Farnham on vocals. Prestwich rejoined Cold Chisel in later reformations.
Prestwich released his first solo album, Since You've Been Gone in August 2000, which he also produced. His second album, Every Highway was released in October 2009.
Prestwich was the father of a daughter, Melody, and a son, Vaughan.
Prestwich died after never regaining consciousness following brain surgery to remove a tumour diagnosed less than two weeks before.