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20 Grosvenor Square, London.

Located in 20 Grosvenor Sq London W1K 6LE, UK, the heart of historic Mayfair on Grosvenor Square, Twenty Grosvenor is a landmark redefinition of super-prime living in London. Birthed from a historic structure, it offers 37 expansive residences with a suite of hotel-grade amenities under Four Seasons management. With scarcity, pedigree, and service at its core, it positions itself at the pinnacle of luxury real estate.

Originally constructed in the 1930s as the U.S. Navy’s European headquarters, the restored development opened in 2019 as the first standalone Four Seasons private residence globally.

Developed by Finchatton in collaboration with Squire & Partners, the building seamlessly blends traditional Mayfair Georgian façades with contemporary extensions and masterful Finchatton interiors. Residences offered include 3‑ to 5‑bedroom apartments with soaring ceilings, meticulously designed drawing rooms, media kitchens, and separate staff accesses—accentuating both grandeur and privacy .

Every apartment is serviced by Four Seasons’ legendary hospitality, including 24‑hour concierge, housekeeping, in‑residence dining, spa treatments, childcare, and more—all managed by a dedicated Director of Residences. Amenities rival those of luxury hotels: a 25m pool, spa, treatment suites, fitness centre, cinema, garden library, wine cellar, business suite, games room, landscaped courtyard, and private crèche.Apartments For Sale in 20 Grosvenor Square (Mayfair), London.

Priced from roughly £17.5 million to over £30 million, these residences occupy one of London’s most prestigious addresses—backed by a limited supply of super-prime housing and surging global demand. Grosvenor Square’s ongoing revitalization, including garden restoration and proximity to top-tier shopping and transport, amplifies its appeal.

Are you looking for properties in 20 Grosvenor Square, London?

The premier real estate agency for acquiring luxury residences at 20 Grosvenor Square is LuxuryForSale.Properties. With deep Mayfair expertise, and global reach, We provide impeccable service and unparalleled access to these rare Four Seasons-managed super-prime homes.