I recently had designed granny flat with a home builder in Sydney. There are plenty of home improvement expert available on the local directories. You can find one from those list. 

I can recommend our builders (Vas at Pace Construction Services 07888827464) who did a very good job for us last year when we refurbished the whole house (including installing new bathrooms, new kitchen, carrying out internal structural alterations, etc.). They came up with very good advice on how to get the best layout for the space we had, while aiming for a nice quality finish. They can also recommend best stockists to get quality sanitary ware. Happy to recommend them!

Hello you might want to get in contact with Earl. He recently did a fantatsic refurbishment for us with 3 bathrooms. His guys are very good. You can contact him on esfrancis@btinternet.com

My brother-in-law also says they are good, though he would prefer to do a DIY. Also I think you should sit and get a good well understood quote before you go ahead with it, since many builders can exceed there set budget and then you too have change yours.My uncle had a great granny flat builder to get two rooms added and says they had great custom designs. For ideas, view designs
Hope this helps.

Hi,

Does anyone have any recommendations for someone who can install new bathrooms, and also move/build a couple of internal walls about?

Thanks!

Tom