Range from the cheapest leak detection £75 (APG Assist Plumbing & Gas based in W5) to the dearest leak detection £270 (ThePlumbers.org based in TW7).
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 Kew by posting a job with HaMuch and we will send it to plumbers in Kew.