The earthquakes in the Indian subcontinent have led to an increase in the seismic zoning factor over many parts of the country. Under such circumstances, seismic qualification of building has become extremely important. Several techniques are available today to control the vibration of the structure, out of which concept of using base isolators has been increasingly implemented internationally in recent years and has proven to be most promising for earthquake safety. To protect buildings against strong earthquakes isolating devices are introduced between the superstructure and the foundation. The devices act under normal circumstances as rigid connections and under earthquakes as shock absorbers. In this project work, with the help of latest available software, we shall model a frame with a rigid base and model is used to study the behavior of the frame under the action of seismic loads. This might get partially or completely damaged dueto inertia forces resulting due to the lateral displacement of the foundation. Isolating devices will be introduced between the superstructure of the building and the foundation. The devices act as rigid connection under gravity loads and shock absorbers under seismic loads. Pushover analysis iscarried out for auto hinge properties, available in SAP2000 based on the FEMA-356 and ATC-40 guidelines. The pushover analysis shows the pushover curves, capacity spectrum, plastic hinges and performance level of the building. After comparing the results of rigid frame structure with isolated frame structure, the behavior of the base isolators can be concluded at the end of the project work.