Who in their right mind would willingly agree to cohabitate with Adelaide Hills SES?!
As far as I know, Adelaide Hills SES are still looking for a new home because their current premises completely sucks as far as having things like no hot water, no parking and having a tiny tin shed for the crew. There had been talk of trying to co-locate CFS/SES a while ago, but unless the CFS and SES in any town get along really well, both services are pretty reluctant to do it anymore due to issues in the past.
So yeah... I think current standing is that Adelaide Hills SES are looking for a new home, but Mt Barker CFS are happy where they are.