Range from the cheapest installation of an unvented hot water cylinder £175 (FD Plumbing & Heating based in W4) to the dearest installation of an unvented hot water cylinder £1505 (ThePlumbers.org based in TW7).
Comparing heating engineers estimates for fitting an unvented hot water cylinder, e.g., Megaflo 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 install an unvented hot water cylinder in Kew by posting a job with HaMuch and we will send it to heating engineers in Kew.