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[PRESS RELEASE] Structure Tone completes reposition of historic Twenty St. James’s Street - STO Building Group
As part of their mission to revitalize properties across central London, WELPUT enlisted the help of STO Building Group to upgrade Twenty St. James Street.
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[PRESS RELEASE] Structure Tone completes reposition of historic Twenty St. James’s Street

Structure Tone completes reposition of historic Twenty St. James’s Street

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The complex refurbishment of the commercial office building at 20 St. James’s Street is now complete, creating a high-quality, modern, sophisticated West End office building.


As part of their mission to revitalise properties across central London, WELPUT advised by Grafton Advisors enlisted the help of Structure Tone to upgrade and reposition Twenty St. James’s Street. Over the past 18 months, Structure Tone has worked collaboratively with ORMS, WPP and HTS to deliver 10 floors of top quality office space and a striking reception area with signature artwork. This artwork includes a 18m brass veil, manufactured by a specialist contractor and forming a centrepiece to the development.


The project involved a transformative structural refurbishment. The existing cores have been removed from the centre of the building, which allows the new design to maximise lettable floor space by consolidating the cores to a single core at the rear of the floor plate and infilling the existing atrium.


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Other upgrades to the building include installing three new lifts, restoring the existing façade to also include new double height street-level glazing and adding a skylight to the lower ground floor.  A new lavish reception better fits contemporary clients’ expectations, as do premium amenities and facilities on each of the 10 floors, and bicycle/showering facilities in the basement.


Throughout the project, Structure Tone was careful to protect the adjacent landmark Mayfair cigar shop so that business remained unaffected by the works. At the topping out in May 2017, our guest of honour was the Mayor of Westminster.


“This project has been an incredible opportunity to showcase the skills of Structure Tone and our supply chain in this year of our 30th anniversary in London,”

says Dean Manning, managing director of Structure Tone International.

“The new and improved Twenty St. James’s Street is a transformative structural refurbishment that will modernize and enliven the block as a whole and set a new benchmark in premium office spaces in the West End.”


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The owner of 20 St. James’s Street is The Ryder Street Unit Trust. The project team included Grafton AdvisorsGo to, City South Projects, OrmsGo to, WPP, MPG ShreevesGo to and Hayne Tillett SteelGo to


About Structure Tone Refurbishment

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Structure Tone has fast become London’s go-to contractor for delivering technically complex refurbishment and building repositioning projects.
Led by Kevin Crane, our extensive experience of providing significant structural and aesthetic alterations allows us to offer developers and landlords such as Grafton Advisors, Savills and JP Morgan extremely high-quality developments with confidence.

Connect with Kevin – Email »Go to


More related Projects:

J.P. MORGAN, London

60 Victoria Embankment RefurbishmentGo to

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Royal College of General PractitionersGo to


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