Nell Gwynn House is a ten-storey residential building in Sloane Avenue, Chelsea, London, designed in the Art Deco style by G. Kay Green.

[3]With a footprint forming a giant capital W, the building's geometric design is Cubist, making use of Egyptian, Aztec, and Mayan patterns and materials.

"[4]In 1948, a music club was established, with Sir Adrian Boult as President, and was patronised by Vaughan Williams, Arnold Bax, and John Ireland.

[7] Since 2006, the Trustees of the building have undertaken multiple major refurbishment works, both inside and out, including the renovation of more than half of the apartments and the restoration of the Art-Deco features in the reception front driveway and public areas, by renowned designer Tim Gosling.

[10] In a taxation case in the High Court in 1966, Mr Justice Megarry concluded: “I am certainly unable to say that, as a matter of law, the Special Commissioners were wrong in being unable in these circumstances to find in Nell Gwynn House sufficient of the qualities of an investment to enable them to say that it was indeed an investment.”[11] In 2010, NGH Freehold Ltd, a management company representing about three-quarters of the lessees, bought the freehold (see collective enfranchisement) which lowered the cost for the lessees of licences to make any major alterations or other works.

This stands at the foot of an alcove six storeys high, topped by an art deco set of reliefs, and is hard to see from Sloane Avenue, so is mostly unnoticed by the traffic, but it is believed to be the only statue of a royal mistress anywhere in the capital city.

[13] In February 2013, a blue plaque was unveiled by Barbara J. Stephenson, the deputy chief of mission at the United States Embassy in London, in honour of the social reformer and abolitionist Frederick Douglass.