Guernsey housing laws explained:
http://www.gov.gg/ccm/navigation/hou...using-control/
Unless you get a licence (your employer would need to fix that):
http://www.gov.gg/ccm/navigation/hou...sing-licenses/
you will need to live in the 'Open Market'. Buying houses start around £600k, renting £25k/annum. If you only want to rent a room in an open market house that starts around £700-£800 month.