Anth, looks great, should be very nice when finished.
Franco, it's always risky trying to avoid council approval. I don't know about yours but I believe ours uses aerial photos to keep an eye on what's being built! I recently wanted to build a shed for my sewing machines and reloading gear. I was limited to 15 sq.m without council approval so went with that because I knew it was going to be an (expensive) pain building anything bigger. This way I didn't need to involve the council.