I would start at the end. The owner has converted a studio to a two-bedder? Contact your local council as I would be surprised if this has a DA. It will also almost certainly be in contravention of strata laws and by-laws. If so, attack from every direction you can think of – planning department, Fair Trading and NCAT.
So forget the tenant and Housing NSW – there is a clear resentment from both parties towards owners – and focus on the lot owner. Forcing then to re-establish the unit as a studio will solve all your problems when the troublesome tenant moves out.
Oh, and if anyone from Housing NSW is reading this, we know what you are doing. You’re dumping problem tenants in residential blocks and then gleefully letting other people deal with it because you either don’t know or don’t care how much trouble you are causing.
Maybe you actually enjoy lowering the quality of life for people – renters and owners – who are just trying to make a go of things.
There’s nothing wrong with housing people in apartment blocks – just don’t expect the other residents to deal with the mess you have created because you can’t or won’t do your jobs properly.