South Mumbai is witnessing an explosion in real estate prices builders are demanding, Rs 60 crores for 10000 sq feet flat and they are getting it.Morarka house, an old NTC property in Napeansea Road in South Mumbai which was bought for Rs 200 crore, is selling at Rs 60 crore a flat for 10,000 sq feet. Construction has just started, making it Mumbai's most valuable flat so far.