Range from the cheapest basement sump pump installation £600 (Marian Plamada based in NW1) to the dearest basement sump pump installation £1200 (LUCO - London Utility Company based in W1W).
Comparing plumbers estimates to install a basement sump pump 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 a basement sump pump in WC2N by posting a job with HaMuch and we will send it to plumbers in WC2N.