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One Berkeley Street

London / Crosstree Estate Partners / Allford Hall Monaghan Morris / 240,000 sqft

One Berkeley Street is an existing 9-storey mixed-use building located in Mayfair within close proximity of Green Park. The development comprises of soft strip back to existing shell and full refurbishment and extension, with a two-storey addition at roof level, an extension into the existing courtyard and a new Pavilion building to the corner of Piccadilly. The refurbishment also includes façade and MEP service replacement, full category A fit out, and the hotel demise delivered to shell only.

Key Project Features

  • Working with the existing building means embodied carbon is less than half that of an equivalent new build
  • Circular economy principles including the use of reclaimed RAF tiles to the office space and salvaged bricks from the demolition works
  • Facades retained with repairs and cleaning to works carried out to restore a significant portion of the existing brickwork and Portland stone
  • Retained structure with structural infills and enhancements through early demolition works to make use of the existing structure where possible

Core Five Added Value

  • Detailed cost planning throughout design development enabled careful monitoring and management of costs at each stage, securing approximately £2.5m value engineering pre-contract
  • Significant amount of market testing carried out pre-contract (approx. 75% of packages) to gain useful insight and advice from potential suppliers
  • Bespoke procurement strategy with early direct packages to balance client drivers for programme, cost certainty and early contractor involvement
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