Lachie you are correct. It has collapsed, I was there in June 2013, it was due to heavy seas. The basalt columns near the cliff face have also gone. I was too far away to be 100% about the columns, not so with shag rock.
I was recently down that way and saw the house in question, yes maintenance is high but if they don't keep it the NSW gov will step in and demolish it so....may as well use it...say what