As we know that each and every building has life cycle. So it very important to find out the strength of each and every part building like column, beams, slab. In the construction of any structure concrete and steel performs vital role. It generally depends upon what type of concrete, steel used. IS 456:2000 is used for steel. There are several test are performed that is destructive test and non destructive as well. Concrete is used is also depend upon climatic condition as well. In India generally destructive test are used such as rebound hammer, ultrasonic pulse velocity test, carbonation test. In structural audit we try to find out the life of structure comparing with the standard codes. Because our Indian standard code has solution of structural health of building. In India we are seen that many buildings are suddenly collapse this is due to we don’t find out structural health of building. So this necessary to audit of structure after 15 years. Keywords- Structural Audit, Non Destructive Testing, Grouting, Strengthening.