Browse Forums Building A New House Re: Perth - Class S Soil - 83K Site Costs???! 3Apr 28, 2023 9:36 pm alexp79 Compacted sand pad shouldn't be costing that much? You would have to go with piles otherwise. May be 600 mm is overreach, 300 mm should do with stiffened rafted slab in most cases. I am not sure whether Perth has its own way of doing things in regards to this. Most of Perth has class A (sandy soil), except for some areas near rivers or hills. We were lucky in that our old house was so small (86 square metres) compared to the new house, they were able to take enough readings around the old backyard house before… 8 37545 PM me your email. I have a build excavation calculator you can use based on your plans to double check what your builder is telling you. Cheers Simeon 1 10318 I don’t think so as the floor area over 300 square meters then it is class 3…. 12 18007 |