Replacement of all existing single glazed timber windows with new double glazed timber windows; replacement of existing single glazed timber moulded door including single glazed obscured toplights with a new double glazed timber moulded door including double glazed obscured toplights to the front elevation, and replacement of existing single glazed timber door including single glazed sidelight and toplight with a new double glazed timber door including double glazed sidelight and toplight to the rear elevation at ground floor level.