In India, the average lifespan of a concrete house can be anywhere from 75 to 100 years, depending on various factors such as the quality of the construction materials and the maintenance of the property. The geographical location, local weather conditions, and natural disasters can also play a significant role in determining the lifespan. Regular maintenance and repairs can significantly extend the life of these concrete homes. However, it's important to note that concrete structures may require renovation or major repairs every 20-30 years. So, despite the durability of concrete, it's not a 'build it and leave it' scenario.