Range from the cheapest replacement tap installation £150 (South London Gas and Heating based in SE19) to the dearest replacement tap installation £255 (1977 - Denham Plumbing and Gas based in SE26).
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 SE21 by posting a job with HaMuch and we will send it to plumbers in SE21.