Range from the cheapest replacing of a cold water storage tank £200 (Barry David May based in N1) to the dearest replacement of a cold water storage tank £500 (Phdheating based in N19).
Comparing plumbers estimates for replacing a cold water storage 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 N1c by posting a job with HaMuch and we will send it to plumbers in N1c.