Abstract: A collapsible building comprises first, second, third and fourth panels which in use form a floor, a roof and side walls of the building being pivotally connected so as to be able to be folded down to lie parallel to each other, and fifth and sixth end panels. The end panels are each pivotally attached to both the first and second panels and also have a pivotal joint so that an outer face of each panel may be collapsed onto itself in accordian fashion. Each end panel has a substantially circular rim to allow the erected building to be rolled into location. Stabilizers are provided to stabilize the building once in position.