Range from the cheapest Fix a leak £120 (APG Assist Plumbing & Gas based in W5) to the dearest Fix a leak £380 (ThePlumbers.org based in TW7).
Comparing plumbers estimates for Fix a leak 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 for fixing a leak in your home by posting your job to plumbers in Kew.