A corner townhouse in London listed in May for £42 million ($52 million) in Chelsea Barracks, the neighbourhood that had a former life as a military barracks for the British Army and is now turning into some of the most exclusive real estate in the city. 2 Mulberry Square is comprised of 11,494 square feet arranged over six floors with a classical stone staircase, an elevator and the biggest private wellness space in the posh SW1 postcode.