Project

Windsor House

Demolition and rebuild on a constrained site

Based near beautiful Green Park in Central London, a new build steel framed commercial office building development providing 24,000 square feet of office space with a new double basement.

On St Jamesā€™s Street in SW1A, this development included demolishing the original building, and erecting a new one which included a new double basement level; adjacent to a London Underground interchange tunnel and several roads.

Walsh worked closely with the contractors Galliford Try to devise an efficient buildable solution using a steel frame structure. The tight central London site had significant constraints including the existing basement substation that had to remain live until a new facility had been constructed on the site.

We were also tasked with developing this area into a double basement. This required Approval In Principle (AIP) and several further approvals such as Party Wall Awards, three separate roads and a London Underground tunnel.

During the project it became apparent that the required lettable area in the basements was constrained by a variety of boundary conditions. To solve these challenges without compromising the plans, we worked closely with Galliford Tryā€™s temporary works engineers and successfully achieved everything in the original plans without delay.

Client 
  • Lothbury Investment Management
Architect 
  • EPR
Contractor 
  • Galliford Try
Sectors 
Location 
  • London
  • Westminster

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Taking Sustainability Seriously

Sustainability is in our DNA and we have our own ambitious goals to achieve Net Zero as a business and with our designs. With innovative in-house monitoring tools, Walsh clients have seen on average reductions of 10-20% total embodied carbon, with some of our flagship work achieving 60-70% reductions compared with baseline figures.