The One Hyde Park apartment building contains some of London's most expensive apartments. For those in the know, the whispered price tag for PH-B is about £175 million ($247 million) or more than $13,700 per square foot.

One Hyde Park, located in Knightsbridge, London, remains one of the most expensive and exclusive residential addresses in the world. Prices for apartments in this prestigious development vary wildly based on the number of bedrooms and the specific "block" view, but as of 2026, a standard one-bedroom apartment typically starts around £7 million to £10 million. For larger units, such as a four-bedroom flat, prices can range from £20 million to £35 million. The ultra-luxurious penthouses, which offer panoramic views of both Hyde Park and the city skyline, have historically sold for over £100 million to £160 million, making them some of the most expensive real estate transactions in British history. Residents pay a massive premium for the building's unparalleled amenities, which include 24-hour room service from the adjacent Mandarin Oriental Hotel, a private cinema, a virtual golf simulator, a 21-meter swimming pool, and SAS-trained security teams. Even the service charges and ground rents for these properties can exceed the cost of a luxury home elsewhere in the UK, solidifying One Hyde Park's reputation as a sanctuary for the world's ultra-high-net-worth individuals.