In this project "Base Isolation", we are going to discuss what is actually base isolation and its importance. This project sheds light on various methods such as 'Time History Analysis' and Response Spectrum' to protect structures from the earthquake. Base isolation has become one of the reliable tools for earthquake resistant design of the structure. Base isolation system for buildings is introduced to decouple the building structure from potentially damaging induced by earthquake motion, and to make a comparison for the difference between the isolated base and fixed base buildings. The response of the structure with base isolation is analyzed using Etabs.