Range from the cheapest Fix a leak £160 (Absolute kitchen and bathroom based in HP3) to the dearest Fix a leak £420 (Harrison Forsythe Plumbing and Heating based in Hp1).
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 Hem.