It is surprising, I would even say rare, these days to find a contractor that ticks every box of workmanship, dedication and attention to detail.
They are certainly not one to cut any corners to give an excellent end result (even refused to adopt a couple of my "that's near enough" suggestions).
I have used them for laying a floating floor to replace carpet, completely renovate the kitchen and build a 3m X 8m verandah deck.
So they don't just do plumbing ...
Certainly not the cheapest, but you definitely get what you pay for. I have no hesitation in recommending 4 Generation and they will be my first port of call for any similar works