Excavation of a basement beneath the footprint of the original dwelling. Erection of additional mansard roof storey with dormer windows. Alterations to elevation to provide new windows. Merging the two existing flats into a single dwelling house.

Erection of a single storey infill extension at rear ground floor level, erection of a rear dormer roof extension, alterations to windows and doors, all in association with the use of the building as three self contained flats (Use Class C3).