> In the UK, if your shed is less than 15m^2 and is not used as living accomodation, no building regulations apply
And is 'temporary', right? I didn't know about the size limit, but I thought it had to be a sort of free-standing structure not fixed into the ground - i.e. you can make a concrete level base, but you can't embed your vertical supports in it?
My dad has built several sheds in our backyards/land over the years. I recall he hacked the "permanent structure" definition by packing the dirt, then laying 4x4 lumber as the foundation.
