This project gives in brief, the theory behind the design of liquid retaining structure. Water tanks are storage containers for storing water. Elevated water tanks are constructed in order to provide required head so that the water will flow under the influence of gravity, the construction practice of water tanks is as old as civilized man. The water tanks project has a great priority as it serves drinking water for huge population from major metropolitan cities to the small population living in towns and villages. The main aim of this project is to understand the behavior of elevated water tank by observing the results of Bending Moment, Shear Forces, Maximum Stress, and Maximum Displacement and Design by using BIM software.