Seaford House



Seaford House, previously Sefton House, is a former aristocratic mansion and the largest of the detached town houses sited on each corner of Belgrave Square, London, England. A magnolia stucco building with four main storeys, it is most famed for its interiors (the first floor, or piano nobile, being decorated in Beaux-Arts style).

Early history
Dating from 1842, Sefton House was designed by Philip Hardwick to meet the requirements of the 3rd Earl of Sefton. The town house, with its railings and gate piers, is listed Grade II* for architectural merit. The 3rd and 4th Earls of Sefton enjoyed using it as their London town house; the 5th earl, being an invalid, could not do so and after he died childless in 1901, its lease was sold to William Tebb.

Lord Howard de Walden, also Baron Seaford, acquired the lease of the house in 1902 renaming it Seaford House and installed friezes, panelling, and a staircase of green onyx specially imported from South America.

Later history
Requisitioned by the Wartime Government in 1940, and for a while was used as offices by the Air Ministry, Seaford House was badly damaged by Luftwaffe aerial bombing in October 1940, and rebuilt thereafter (but without the porte-cochère). In 1946, it became the home of the Imperial Defence College, now the Royal College of Defence Studies.

Seaford House is usually open to the public free of charge on Open House Weekend each September and can also be seen on screen. The main vestibule doubled as Titanic's Grand Staircase in the 1979 miniseries SOS Titanic. It was also used in the filming of Upstairs, Downstairs and later of the BBC spy show Spooks. 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. It can also be seen (doubling as the US Embassy) in the 2021 film The King's Man.