Range from the cheapest replacement of a header tank £278 (A1 Boiler Repair London based in EC2A) to the dearest replacement of a header tank £401 (LUCO - London Utility Company based in W1W).
Comparing plumbers estimates for replacing an expansion header water tank for your central heating 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 a header tank in EC2R by posting a job with HaMuch and we will send it to plumbers in EC2R.