A portable, demountable or transportable building is a building designed and built to be movable rather than permanently located. Smaller version of portable buildings are also known as portable cabins. Portable cabins are custom built prefab structures manufactured for variety of applications such as site office, security cabin, accommodation, storage, toilets etc. Portable cabins are an affordable alternative to traditional buildings, and of course, they offer a flexible solution where accommodation is required for an uncertain period of time.