Abstract: A transportable housing structure comprising a cabin unit having access openings and a foldable/unfoldable annex attachment at the rear or trailing end and capable of forming a caravan-body or campervan-body or similar vehicular body is provided, the annex attachment being formed by a pair of rigid panel members hinged to the top and bottom of the cabin unit respectively for movement from a folded, relatively vertical, non-use position to an unfolded, relatively horizontal, in-use position; a flexible cover member extending around the peripheries of the panel members top to bottom from the rear of the cabin unit; a pair of hinged posts at the outer corners of the panel members to depend from the top panel member and support the unfolded top panel member on the unfolded bottom panel member; and a pair of hinged legs to depend from the outer corners of the bottom panel member and support the unfolded annex attachment on the ground.