Mercury House

Jefferson Sheard Architects have redesigned this former office building in Welwyn Garden City to repurpose it as forty-three modern residential apartments. Via permitted development and in conjunction with a full planning application, the accommodation space has been significantly increased through adding an additional storey to the existing building and a new side extension.

The core design challenge we were faced with, was to update the standard office appearance to provide a revitalised development which reads clearly as a high quality, residential building. Our response included reproportioning windows and projecting elements such as balconies to help break up the monotonous façade, providing variation and interest across the elevations. The additional storey now reads as a mansard, attic level and is clad in a dark grey metallic cladding.

The existing, glazed, office entrance, which has been retained, has been re-clad in parts to fragment the overbearing entrance feature and help provide a residential scale in keeping with the new design of the building.

Works on site have begun and the project is expected to be completed toward the end of 2018.


  • Housing


Aldenham Residential

Welwyn Garden City