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Heritage Restoration and Refurbishment of Devonshire House in London by Gunite

Gunite helps to conserve London’s Mayfair with the restoration of a magnificent Grade II listed building

Situated in the heart of Piccadilly above Green Park Underground Station, Devonshire House stands majestically alongside some of London’s most beautiful structures.

Desperately in need of restoration and conservation, Gunite was selected as the main contractor responsible for carrying out the works.

With over 50 metres of frontage, and housing two entrances to Green Park tube station, Devonshire House serves both as a residential and commercial property which was a challenge as Matthew Otter, Project Manager explains;

We knew at the outset this project would be a challenge and fully understood working close to commuters, residents and office workers would mean additional precautions had to be put in place to ensure everyone close to the building was safe. Our site teams have years of experience working in these environments so I was confident the project would be a success.”

Years of dirt and grime were carefully lifted from the Portland stone facades using the Stonehealth DOFF cleaning system.

Damaged and defective areas of the façade were repaired using Remmers restoration mortar, colour-matched to the existing stone.

Cracks within the stonework were stabilised using a resin based grout to encapsulate and protect the steel from future corrosion.

The works were carried out from a system of powered access cradles suspended from the roof of the building.


  • Cradle and scaffold access
  • External stone cleaning using the DOFF system
  • Stone repairs
  • Window refurbishment and decoration
  • Asphalt roofing
  • Grouting
  • Lead refurbishment
  • Mastic sealant

In conclusion, the project was successfully completed on time and within budget and the results speak for themselves.


Client Mourant & Co
Value £1.5M
Duration 1 Year
Sector Heritage, Commercial
Accreditations 2018