Range from the cheapest cost to decorate a room £275 (London Interior and Exterior based in E8) to the dearest painting and decorating cost £430 (LUCO - London Utility Company based in W1W).
Comparing painter & decorators estimates to Paint and decorate a room 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 painting and decorating a room in your home by posting your job to painter & decorators in EC2V.