Career
He was an Australian Labor Party member of the Australian Capital Territory Legislative Assembly from 1998 to 2012. He acted as Minister for Territory and Municipal Services, Minister for Multicultural Affairs and Minister for Housing. On 12 October 2009 Hargreaves announced his resignation as Minister from the Labor Cabinet although he stated that he intended to continue in his role as Modern Language Association for Brindabella.
He retired from politics in 2012.