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One Berkeley Street


70-73 Piccadilly


hotel & leisure, commercial


refurbishment, new build extensions, shell and Cat A finishes


£ 70 million


Crosstree Real Estate Partners LLP

Delivered by

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Project details

Presenting 1 Hotel Mayfair, a pinnacle of luxury boasting 190 keys within its 5-star confines. This architectural gem is not just a hotel; it’s an experience encompassing a restaurant, bar, conference facilities, spa, and a state-of-the-art gym. As the UK flagship for Starwood’s sustainable luxury hotel brand, it stands as a testament to a harmonious blend of opulence and environmental responsibility.

This remarkable establishment seamlessly merges the contemporary with the existing, as it is both a new-build and a conversion of a 1970s structure. This innovative approach not only preserves the embodied energy and carbon but also minimises site waste, marking a significant stride toward sustainability. Two new-build floors house guestroom suites, treating occupants to breathtaking views of the Ritz Hotel and Green Park.

The journey of transforming the existing building posed unique challenges, including mixed construction types and disparate floor levels. The response? Clever solutions that weave seamlessly into the fabric of this architectural marvel.

But 1 Hotel Mayfair is not just a standalone venture; it’s part of a larger narrative. Integrated into a 240,000 sq. ft. mixed-use project by Crosstree Real Estate Partners, it shares space with sustainably-designed offices and prime retail.

Together, they form a holistic tapestry of luxury, sustainability, and functionality, redefining the landscape of modern hospitality.

Scope of works

  • new build extensions and rebuilt storeys at levels 7 and 8
  • extensive refurbishment of the existing façades and installation of new façades as well as extensive new roof areas and terracing
  • Cat A office fit-out to office levels 2 — 6 on the Piccadilly elevation (c. 57,000 sq. ft NIA)
  • fit-out to reception, lift lobbies, washrooms and back-of-house areas
  • shell only to retail space at ground floor and basement level (c. 18,000 sq. ft NIA)
  • plantrooms on the roof and in the basements (c. 10,000 sq. ft NIA)
  • shell only to Hotel space Level G — 8 on the Berkeley Street elevation and levels 7 and 8 on the Piccadilly elevation (c. 109,000 sq. ft NIA)
  • new UKPN substation
  • new MEPH installation
  • new lifts to all hotel & commercial offices.

Piccadilly, West view

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