Range from the cheapest replacement tap installation £120 (Kevin Plumbing Gas and Heating based in E2) to the dearest replacement tap installation £255 (LUCO - London Utility Company based in W1W).
Comparing plumbers estimates for fitting a replacement tap 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 tap in EC4M by posting a job with HaMuch and we will send it to plumbers in EC4M.