Occupying the entire floor, this remarkable five-bedroom sub-penthouse opens out to sweeping river and skyline views through extensive glazing. Its distinctive diamond-shaped design gives the residence a striking sense of space and a perspective that changes with the light, from the Thames below to the city’s most recognisable landmarks on the horizon.

At approximately 4,383 sq ft, the apartment has the scale to make everyday life feel exceptional. A generous central hall creates a natural sense of arrival and separates the entertaining spaces from the bedroom suites.

At the heart of the home, the open-plan reception, dining area and kitchen form one impressive setting: a place to host, gather with family or simply take in the view. The large kitchen island brings everyone together, while the broad layout offers room to live at your own pace.

The principal bedroom suite is set apart in its own private wing, with fitted wardrobes and an en-suite bathroom. Four further bedrooms offer space for family and guests, with several en-suite facilities. The result is a home that combines the openness of a grand lateral apartment with the privacy and comfort of carefully separated accommodation.

Designed by BAYA Interiors, the furnished residence brings a considered design vision to one of Chelsea’s most distinctive new addresses. Beyond the apartment, residents can enjoy a 24-hour concierge, private lounge, indoor swimming pool, gym, jacuzzi, sauna, steam room and landscaped gardens. The wider Chelsea Waterfront setting places the river, riverside walks, restaurants and the boutiques and cafés of the King’s Road close at hand.

For a buyer seeking a London home with true presence, privacy and a view that is difficult to replicate, 21.1 offers a rare chance to own the whole of the 21st floor.