ion by offering ready-to-install building elements such as blocks, joist beams, roof blocks and panels is being widely recognised in the industry. Pre-fabricated components are becoming immensely popular due to the several attractive advantages that they offer, such as off-site fabrication, which allows reduction in construction time and this function helps greatly in managing the schedule of the construction project. Due to their low density, the prefabricated components impose a relatively lighter load on the structure and superior quality can also be achieved as these components are manufactured under a strictly controlled environment. In recent times few innovations in the field of materials are expected to make these products even more popular, user friendly and eco friendly. The present paper discusses on the manufacturing of prefabricated building components using fly ash, and explains regarding fabrication, centring, placing, applications and the advantages over the monolithic construction. This paper aims to popularize the promotion of prefabrication building methodologies for low cost housing by highlighting the different prefabrication components and techniques, and the economical advantages achieved by its adoption.