As for materials, they cost around $2000. Thats including decking boards, joists, stirrups, concrete, screws (LOTS AND LOTS OF THEM AHHHHHH). Some extra money was spent on some drill bits, concrete mixer hire and BEER.
I think all up it cost around $2300. I dont know how much a builder would charge but I am sure I have made a saving.
How many m2 is it?