Hi all, Quick into. I have planning permission for a small house in Hertfordshire which includes a basement. The house is L shape above ground and squared off underground in the basement. The plan is for the superstructure to be SIPs I'm struggling with the basement and getting quotes and designs that are comparable. The only certain part is the requirement for a contiguous piled support structure. Anyway, I'm going to have a good read through the basement section of the forum and