Unit 18 within Casuarina Prison is located on Whadjuk Noongar land, in the suburb of Casuarina, Perth.

In July 2022, following persistent destruction of cells and other infrastructure, Unit 18 within Casuarina Prison was gazetted as a youth detention centre to temporarily house disruptive male detainees.

Prior to this, Banksia Hill Detention Centre was the only youth detention centre operating in Western Australia.