LTH; We have a 1.3m fall on our block. The site costs were just over 15k - We need a cut and fill along wilth some piers and agi drains. They made mention that our block had fill and then sand. They have to go down a bit to get to settled soil. I think that explains why we needed piers.
(doesn't make much sense to me but I thought the 15k was ok. I was hoping for 10k but ahwell)
I will get the floor plans up soon... I hope... abit slow on this. Promise i'll get there.