Demolition of first floor of two storey rear part of building and erection of a replacement first floor and an additional two floors above to create new second and third floors at the rear, erection of a rear extension at main roof level to house an internal staircase, change of use of the replacement rear first floor, second floor and third floor level building from office (Class B1a) to residential (Class C3) in connection with the creation of 1 x 2 bedroom, 2 x 1-bed flats and 1 x studio self-contained flats; associated external alterations consisting of the removal of a window and the addition of 4 windows to the first and second floors and the addition of a rooflight to the third floor of the western elevation of the front part of the building; the removal of an external security grill to an existing first-floor rear window.

Erection of a hip to gable end roof extension; lowering the ridge height of the main roof and erection of an additional floor at roof level; raising of the front and rear parapet walls; alterations to the first floor roof of back addition to include the installation of new rooflights; alterations to the front fenestration to include the installation of new windows at first floor level, new windows and doors at ground floor level to replace the existing doors and windows; alterations to the rear fenestration to include installation of new windows to replace the existing windows at ground floor level; removal of existing windows at first floor level to the rear elevation; lowering of internal floor level and change of use from office (Class B1) into residential (Class C3) in connection with the conversion into 2 x 2 bedroom self-contained flats.

Change of use of the ground and basement floor level of Leigh Court and 6 Avonmore Road from offices (Class B1) into 6 self-contained residential units(Class C3); and the reconfiguration and refurbishment of the upper levels of Leigh Court to provide 20 self-contained flats, including elevational alterations including replacement and alterations to fenestration at the front and rear elevation, the provision of juliette balconies, and associated cycle and refuse storage at basement and ground level.