A palatial £135 million Belgravia “giga-mansion” has come on the market after a lavish refurbishment in potentially the most expensive property sale in London this year.
The vast stucco fronted “wedding cake” residence is on the north west side of Belgrave Square, arguably London’s most spectacular garden square.
The “majestic” house has a total of 28 bedrooms and 27 bathroom, including guest and staff accommodation, according to an estate agent’s listing .
Facilities at the seven storey mansion include a wood panelled billiards room, private cinema, gym, jacuzzi, sauna, swimming pool, lift, parking for six cars, and courtyard garden, with an adjoining mews house behind the main house.
The first floor master suite has south facing views over the square best known for its embassies.
Details of the sale, which is being handled by upmarket estate agents Sotheby’s International Realty, were published in an advert in the Financial Times at the weekend. No-one at Sotheby’s was available for comment.
The advert describes sumptuous interiors designed by New York architect Peter Marino, whose other London projects have included the five star Peninsula Hotel at Hyde Park Corner, the Bulgari London hotel, and luxury fashion label Dior’s superstore on New Bond Street. Marino has rarely taken on whole house projects in London
The house was originally built by British architect George Bavesi in 1824. The listing says “the original features in the house have been meticulously preserved, making it a living piece of architectural history.”
The buyer is almost certain to be a billionaire or a member of a Middle East ruling dynasty.
The property is one of only a handful of London homes that ever come on the open market for more than £100 million, invariably in a handful of super elite addresses in Mayfair, Belgravia, Kensington and Chelsea.
Only a small number of of places on earth can support property prices above the £100 million mark, including Dubai, Monaco, the French Riviera, Manhattan, Beverly Hills, Singapore and Hong Kong.
The listing comes only three months after another Belgrave Square mansion, number 17 on its west side, came on the market priced at £110 million. It means that a quarter of a billion pounds worth of homes are now on sale on the square.
The Grade 1 listed former headquarters of the Royal College of Psychiatrists was redeveloped by Fenton Whelan after standing vacant for several years.
Belgrave Square is primarily a base for embassies, including the newly reopened Syria embassy at number 8, Kuwait (11A), Brunei (19-20), Germany (21-23), Spain (24), Bahrain (30), the Saudi Cultural Bureau at 29 and Turkish embassy at 43.
The square contains statues of Christopher Columbus, Prince Henry the Navigator and Simon Bolivar. It was the brainchild of the 2nd Earl Grosvenor, later the 1st Marquess of Westminster in the 1820s and takes its name from one of the Duke of Westminster’s subsidiary titles, Viscount Belgrave, after a village in Cheshire.
A recent survey of London billionaire homes conducted by upmarket agents Beauchamp Estates found that Belgravia was the most popular district, accounting for 8 of the 41 deals at £15 million or higher in the capital in 2025.
