Range from the cheapest Boiler service £40 (Harvey Plumbing & Heating based in B73) to the dearest Boiler service £180 (CallGas based in B24).
Comparing heating engineers estimates for a Boiler service 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 a boiler service by posting your job to heating engineers in B24