a single-storey extension to the western side and rear of the house with flat roof, parapets and rooflights; with new steps and landing to the side; [2] the extension of the existing dormer window section in the front elevation to the western gable; [3] the connection of the two existing dormer window sections in the rear elevation and the extension of this connected dormer window section the western gable; [4] the replacement of all windows; and [5] the rendering of existing pebbledash areas with smooth render to match the finish of the proposed extension works; with all associated site works.