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One Berkeley Street


1 Berkeley St




refurbishment, new build extensions, and fit-out


£ 70 million


Crosstree Real Estate Partners LLP

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Project details

A 190-key, 5-star hotel with restaurant, bar, conference facilities, spa and gym. 1 Hotel Mayfair is the UK flagship for Starwood’s sustainable luxury hotel brand.

The hotel is part new-build and part conversion of an existing 1970 building, thereby making large savings of embodied energy, carbon and site waste. The two new-build floors accommodate guestroom suites with views overlooking the Ritz Hotel and Green Park. Works to the existing building presented a number of challenges including mixed construction types and disparate floor levels that called for clever solutions.

The hotel is part of a 240,000 sq. ft. mixed-use project by Crosstree Real Estate Partners that includes sustainably-designed offices and prime retail.

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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