Range from the cheapest Fitting a boiling water tap £40 (APG Assist Plumbing & Gas based in W5) to the dearest Fitting a boiling water tap £170 (ThePlumbers.org based in TW7).
Comparing plumbers estimates for Fitting a boiling water tap 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 fitting a boiling water tap by posting your job to plumbers in Kew.