can you build a fake wall? then it doesn't matter if waste is off centre.. as the vanity would sit just in front of the wall and they can direct the plumbing into the wall and down to the waste pipe? like you see in hotels? it also provide you with a ledge for storage.. that way you'll have a nice centred vanity?

Need help with bathroom vanity and shower and kitchen bench and cupboards

thanks to everyone for your helpful comments! I was going to have to pay around $190 for 6 more, but will order them from Beaumont who have a 25% sale on at the moment. I agree that I need to just live with the cost and finish the job properly, but your shortcut suggestions were all really interesting and much appreciated. And archimondo, I'd say it's like having a kangaroo loose in the top paddock.

Thank you both for the comments. Unfortunately there is no way to gain any space either side without embarking on a full house extension. My house (and the rooms either side of the bathroom) are already very small and there is no space to spare. Oklouise your plan would work (though in opposite orientation) if I moved the window to one side opposite the doorway, but I am not sure how I feel about staring directly at the toilet on entry. But as there is no easy solution in the space it might well be the best one. I agree with all the comments about storage, size of vanity and toilet etc. To address Kate's question about the door width, it is approx 900mm wide, and there is no space from the side of the wall. It can't be moved due to the Queenslander design (it is framed by fretwork above the door and hardwood structural posts on either side), and it wouldn't make sense anywhere else given the layout of the house. And yes, that is a window at the bottom of the plan - it is approx 600 wide and it can be moved but only to the left or right on that same wall.