The most challenging part of the project was the build of a cantilevered chimney for the superstructure above. The architectural design called for an aga to be fit on the ground floor and this would require support from below.
As the ground below where the aga would be installed had been excavated as part of the basement build, a new foundation had to be built to support it. Building this foundation as part of the wall, essentially in mid-air proved a large challenge.