Range from the cheapest leak detection £90 (Mohammad Reza Mohammadi based in EN5) to the dearest leak detection £300 (Potters Bar Plumber based in EN6).
Comparing plumbers estimates for finding 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 to detect a leak in Hertsmere by posting a job with HaMuch and we will send it to plumbers in Hertsmere.