India, May 6 -- Billionaire banker Uday Kotak and his family have made the country's most expensive real estate purchase, buying a flat in the 19 Shiv Sagar building at Worli Sea Face at Rs.2,74,784 per square foot.

According to deal papers accessed through property portal IndexTap, the Kotaks recently bought 10 apartments of varying sizes in the building for just over Rs.224.32 crore. They had purchased 12 homes in the sea-facing building in January, with one of the apartments going at Rs.2,71,796 per sqft, a national realty record at the time.

The Kotaks now own 22 of the 24 apartments in the ground-plus-two-storey building, for which they have paid Rs.426.21 crore in total. In March 2018, the Kotaks bought Champagne House, a bungalow...