Range from the cheapest Fix a leak £130 (Keepcare Plumbers based in SE10) to the dearest Fix a leak £400 (Dulwich Plumber based in SE13).
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 SE4.