Previously uninsulated external walls of the rear structures are insulated externally to significantly reduce energy use, and finished with a rough dark-grey render. New and replaced areas of ceiling are built with exposed Douglas fir joists, which combine with the kitchen and timber flooring to bring warmth to the space.

New steel structure was carefully coordinated with the large windows and rooflights so as not to obstruct the corner access and sight lines, and the main beam carrying the floors above is left exposed. The thin-framed sliding doors open at the corner, leading onto the paved terrace and extensive garden beyond.