I definitely don't think its easy ... thats why I am going to make sure I get the design right before even thinking about starting. I am actually doing some…

Thankyou everyone for your reply. Your responses have both put doubt in my mind and hope that this can be achieved.
In other words - I don't know what to do…

Hi ... noob here
I am considering a home extension out the back which would consist of a couple of bedrooms and living area, laundry and maybe a bathroom.
The back extension…