Duke of York's Headquarters

The Duke of York's Headquarters is a building in Chelsea in the Royal Borough of Kensington and Chelsea, England. It was completed in 1801 to the designs of John Sanders, who also designed the Royal Military Academy Sandhurst. In 1969 it was declared a listed building at Grade II*, due to its outstanding historic or architectural special interest.

The building was originally called the Royal Military Asylum and was a school for the children of soldiers' widows. In 1892 it was renamed the Duke of York's Royal Military School. In 1909, the school moved to new premises in Dover, and the Asylum building was renamed the Duke of York's Barracks.

During World War II, the courts martial of German spies, Josef Jakobs and Theodore Schurch, (both tried under the Treachery Act 1940) were both conducted in the building. Its last military use under its present name was as a Territorial Army base.

The site was sold to Cadogan Estates by the Ministry of Defence, with initial proceeds of £66 million received in 2000 and a further £28 million when the site was vacated in 2003. Cadogan has redeveloped the site with Paul Davis and Partners as Duke of York Square. The development includes a public square, upmarket housing and retail outlets, and part of it has been let as new premises for the Saatchi Gallery, which relocated there in 2008. An independent school for pupils between the ages of three to eleven, known as Garden House School, occupies the Cavalry House, part of the Duke of York's Headquarters on Turks Row, which became a Grade II Listed Building in July 1998.