Mumbai, as the financial capital of India, maintains considerable heft over the real estate sector of the country. Most of the banks and real estate focused investment funds have their corporate offices here. Mumbai is the costliest market of India, with a very significant portion of the Rs. 5,000 per sqft supply originating from this region. Being surrounded by sea from three sides, along with ecologically protected land and Sanjay Gandhi National Park, has meant that the city has very little land for real estate development. Thus, the city has become known for its re-development projects.