ssThe erection for a single storey bay window at upper ground floor on the front elevation, the installation of a timber deck at street level to the front lightwell, the insertion of four rooflights to the main roof and to the rear elevation at lower ground level the alteration of an existing window to French doors and at upper ground floor level the enlargement of existing French doors to timber sliding doors together with the erection of a an external staircase from upper ground level to the rear garden with associated increase in boundary fence height.