Range from the cheapest Wallpapering £330 (TDC construction based in SE8) to the dearest Wallpapering £382 (Express PainterZ based in SE13).
Comparing painter & decorators estimates for Wallpapering gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for wallpapering your rooms by posting your job to painter & decorators in SE10.