80 Grosvenor Street

The Brief

Our Client wanted to redevelop this site in the heart of Mayfair to maximise the commercial and retail space. A new build 6 storey commercial office building with a basement spa and a gallery at ground floor was the result. The original façade was retained and relied on to support part of the new building, this dictated that the design needed to align structural levels with the façade openings and general structure of the retained elements.

As a family office making new ground in the commercial sector, the client required our support in establish the brief for the operational requirements of the building and subsequent procurement of the FM partner.




London W1




17,500 ft²


  • Office - New Build Space
  • Arts
  • Leisure


  • Project Management

The Challenge

The project required the team to address a number of challenges posed both by the site and the exacting design to maximise the floor space created in this very constrained site. The building sits over two live Thames Water sewers which required careful survey and exploratory works during the design period and detailed consideration of the construction logistics. During construction the existing façade required extensive temporary steelwork to retain it in place which created challenges for the project and construction team in how the new building was threaded through the propping prior to removal of the temporary works.

Third party matters were also a key challenge throughout the project, with careful management of the numerous neighbours’ interests in the development via party walls and scaffold licences, Westminster and the freeholder Grosvenor Estate; all of which required careful engagement and negotiation.

The Outcome

From the outset the development was intended as the Client’s flagship real estate project in London. The quality of the finishes both internally and externally really set this building apart from other lettable space in the area.

The reception, landlord common areas and amenity spaces are finished in marble, stainless steel, leather, and walnut. The layout of the reception allows views of a bespoke Albert Oehlen mosaic tile artwork for both those within the reception and those passing along Grosvenor Street.

The remaining ground floor space provides a retail unit shell that is earmarked for an art gallery or similar.

"The complexity of the design, structure and construction constraints at this project only compounded the challenges of Jackson Coles as project manager. Jackson Coles spearheaded all parties in pushing the project forward with a positive leadership.. [ensuring] the delivery of one of the finest commercial projects developed and built in London."
Saul Sutton
Managing Director, Frelene

Other Projects We’ve Completed Include

15 Bishopsgate

Kennington Park

White Collar Factory