Range from the cheapest Wallpapering £300 (Patryk Magdziak based in N17) to the dearest Wallpapering £400 (Shehu Construction based in N22).
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 N15.