Cadogan Estates Ltd is a property company owned by the Earl Cadogan, one of the richest families in the United Kingdom. It is the main landlord in the central London districts of Chelsea and Knightsbridge, and is now the second largest of the surviving aristocratic freehold estates in central London, after the Duke of Westminster's Grosvenor Group. The company owes its origins to Sir Hans Sloane, who purchased the manor of Chelsea in 1712, and the 10-acre (40,000 m2) site of Beaufort House at Cheyne Walk in 1737. Sir Hans left his Chelsea estate to his two daughters, one of whom was married to a member of the Cadogan family. The two parts of the estate were reunited in the hands of the Cadogan family in 1821. Many streets and squares on the estate are named after the family, including Hans Place, Sloane Square, Sloane Street, Cadogan Place and Cadogan Square. The estate includes one of London's most upmarket retailing districts, based on Sloane Street, and also contains some very expensive residential property in some of central London's most sought after residential locations. In 2000 the company purchased the Duke of York's Headquarters, a former British Army barracks near Sloane Square, which it converted to retail, office and residential use, and which will be the new home of the Saatchi Gallery from November 2007.
At 31 December 2005 the company held property investments valued at £2,232 million.