Range from the cheapest replacement of a header tank £201 (Barry David May based in N1) to the dearest replacement of a header tank £501 (Ben Williams based in N7).
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 N1 by posting a job with HaMuch and we will send it to plumbers in N1.