The establishment opened in 1992 and is a purpose built local Prison serving all courts in the county of Kent.. Elmley is one of six Bullingdon design prisons in England and is the largest of the three prisons within the Sheppey Group.
- House block1 – First night centre and residential unit
- House block 2 – Remand and convicted adults and young adults
- House block 3 – Integrated drug treatment system addressing the needs of remand and convicted adults and young adults with alcohol or drug problems
- House block 4 – Remand and convicted adults and young adults
- House block 5 – Category C resettlement unit
- House block 6 – This unit holds vulnerable prisoners and foreign national prisoners on two separate spurs. These prisoners are a mix of remand or convicted adults or young adults and those held on behalf of the Home Office