Range from the cheapest replacement of a toilet float valve £15 (1981 based in SR3) to the dearest replacement of a float valve £50 (Mr Plumber based in DH2).
Comparing plumbers estimates for replacing a toilet float valve in the cistern tank 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 toilet float valve in Un by posting a job with HaMuch and we will send it to plumbers in Un.