Queen Anne's Mansions was a block of flats in Petty France, Westminster, London, at grid reference TQ296795. In 1873, Henry Alers Hankey acquired a site between St James's Park and St James's Park Underground station. Acting as his own architect, and employing his own labour, he proceeded to erect the first stage of the block. At twelve storeys, later increased to fourteen, it was the loftiest residential building in Britain.
The Court Circular for January 1897 describes it as "a stupendous pile which, for solidity, comfort and general convenience, sets all rivals at defiance, although twenty years have elapsed and imitations have been legion."
Hankey further extended the flats in 1874 and 1877 to the south and west. There were objections to the height of the flats, not least from Queen Victoria who could no longer view the Houses of Parliament from Buckingham Palace, but existing legislation did not explicitly prohibit building over 100 feet in height, and thus the authorities could not stop Hankey. However, the London Building Act passed in 1894, and its 80-ft height limit was a direct result of "Hankey's Mansions".
It may have been legal complications that led him, for the remainder of the work, to employ an architect, E. R. Robson. Robson continued the mansions around the central courtyard, leaving Queen Anne's Lodge as the sole survivor of the residential properties that had formerly stood on the site. Just before the turn of the century, however, Hankey ran into financial difficulties and the property passed into the hands of the Official Receiver. Under new management, the west block became a hotel and the remainder was let as flats and service suites.