Range from the cheapest installation of an unvented hot water cylinder £245 (1981 based in SR3) to the dearest installation of an unvented hot water cylinder £805 (Keith Jackson Plumbing & Heating based in DH4).
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 SR6 by posting a job with HaMuch and we will send it to heating engineers in SR6.