I guess your wondering Why so high out of the ground??  It was a condition of the permit that the finished floor height be 150mm above the highest known flood level.   This brings the raft slab to almost 1 metre high. Why a raft slab?? As the home will have polished concrete throughout to create thermal mass, the engineers believe that a raft slab will provide the best possible outcome for polished concrete floor with minimal imperfections.

Stephen Robson has demonstrated commitment to the design, construction and maintenance of structures that incorporate industry best practice for sustainable solutions for the built environment - Master Builders Australia