Range from the cheapest replacement of an oil boiler £600 (Paul Russell based in SS1) to the dearest replacement of an oil boiler £2250 (City build.com based in Ss5).
Comparing heating engineers estimates for replacing an oil boiler 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 to replace an oil boiler in SS9 by posting a job with HaMuch and we will send it to heating engineers in SS9.