According to my knoweledge, CP has witnessed a growth of around 25 percent in its rental value within a year and charges Rs. 403 per sq ft a month, so after it became the most expensive there might be chance of increase in rates also.
Connaught Place is the 4th most expensive office locations in the world. It is located in Delhi and well renowned companies are ready to invest in this area. This this has to be the best place for commercial property investment.