Experienced granny flat builders in Sydney are not hard to find but it is challenging to find someone to fit your preferences. There are lots of companies that work in this field and are very good at what they do. That does not mean that everyone will meet your selection criterion or that you will click. It happens all the time for the construction company and the person who hires them to not understand each other.
https://sites.google.com/view/granny-flat-builders4/why-do-you-need-to-choose-experienced-granny-flat-builders-in-sydney