Abstract: A transportable building system including at least partially erecting a building, transporting the at least partially erected building (6) on its side to a building location, locating the at least partially erected building on a support at the building location, and orientating the at least partially erected building so that it is correctly orientated relative to its support. Further disclosed is a transportable building, including a first structural component (51; 58), a second structural component (40;56) and a hinge (68) coupling the first and second structural components whereby the second structural component is pivotable between a folded position and an unfolded erected position of the building. The hinge is reconfigurable to allow the second structural component to be relatively displaced away from the first structural component in the unfolded erected position of the second structural component.