Seaford House
Coordinates: 51°29′57″N 0°9′4″W / 51.49917°N 0.15111°W
Seaford House, originally called Sefton House, at 37 Belgrave Square is an aristocratic mansion in London, England. It is the largest of the three detached houses which occupy three corners of Belgrave Square in the district of Belgravia. Seaford House is a white stucco building with four main stories.
Dated 1842, it was designed by Philip Hardwick for the Earl of Sefton. Seaford House and its railings and gate piers have been listed Grade II* for their architectural merit.
In 1902, Sefton House was remodeled for Lord Howard de Walden, who was also Baron Seaford. It was at this time that it became known as Seaford House. Howard de Walden had a marble staircase, friezes and paneling installed. It is now the home of Royal College of Defence Studies, and is usually open to the public free of charge on Open House Weekend each September.
Seaford House stood in as the exterior of the home of Maggie Gyllenhaal's character Nessa Stein in the BBC and SundanceTV television miniseries The Honourable Woman in 2014.
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