Prefabricated construction is a very common method used around the world, especially used in the UK because it is a cheaper and faster way of construction. Prefabricated construction method can be classified into on-site and off-site prefabricated. On-site prefabricated method involves casting structural building elements within site before erecting to actual location. On-site pre-casting provides several advantages over cast in-situ construction. These include mass production of units, cost and time reduction and improved quality of work. Off-site prefabricated method involves transferring building operations from site to factory. All elements that can be standardised are pre-fabricated in the factory. Prefabrication allows a component to be built whenever convenient, so long as it is delivered to site on time. Normally, this method would involve the assembly of precast elements such as floor slabs, in-filled walls, staircases, etc. into place for incorporation into the main units, columns and beams. This method of construction has reduced the amount of site labour involved in site operations and increased the productivity of the industry. Prefabricated construction is a building process in which elements or modules of the structure are prefabricated at plants, and then transported to the construction site for installation. Using this method can reduce the time of building, also saving construction cost. Prefabricated construction is now widely applied for new houses or other building structures like bridge, tunnels, culverts, construction, schools, hotels, offices, warehouses and water supply system. All the design work is done in the early stages of construction and is measured out several times before ordering, this is the only way that prefabrication will be effective. With the traditional way of building mistakes happen which can be amended quite easily and