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The current construction method for buildings requires the best aesthetic form, high quality and fast construction, cost-effective and innovative touches. As India is a developing country, large scale buildings are being constructed in different parts of the country. In recent years, many projects in India have been facing problems of both costs and schedule delays. Since 30% of the Indian population lives in towns and cities, construction is high in urban areas. Therefore alternative construction systems such as prefabricated steel buildings should be considered. Pre-engineered building is a steel building system that is prefabricated and prefabricated. Pre-engineered structures have many advantages such as optimized design, easy construction, longevity, light weight, low waste, increased productivity, better quality and reduced time and cost compared to traditional buildings. The concept of a pre-engineered building consists of a complete design in the factory and parts of the building are brought to the site in a knock down position. These parts are fixed / attached on site and lifted with the help of cranes. Pre-engineered buildings are very fast construction and call for good aesthetics and quality construction of buildings. Many projects in India in recent years have been facing problems of both cost overruns and scheduling delays. Both of these problems can be controlled by following the concept of pre-engineered buildings. Pre-engineered structures have many advantages such as optimized design, easy construction, longer duration, less weight, less waste, increased productivity, better quality than traditional buildings, less time and cost. This study compared costs between traditional and pre-engineered buildings by selecting two projects. The literature review was done and the facts related to this concept were provided. A detailed cost analysis is done between the two buildings and it is concluded that pre-engineered buildings are more economical than traditional buildings based on factors such as better planning, distance from the construction unit, proper operation and type of buildings. This also concludes that pre-engineered buildings are much more economical than traditional steel buildings for low-rise buildings.