Range from the cheapest Fit a radiator £120 (Mr Stephen Heather based in W10) to the dearest Fit a radiator £230 (Abbey House Plumbing and Heating Services based in NW8).
Comparing heating engineers estimates for fitting a new radiator in NW2 gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes. Radiators vary in price, and additional hours will be required to make pipework changes.
What to do - Get rates and quotes for removing your old radiator and replacing it with a new radiator by posting your job to heating engineers in NW2.

"Fit a radiator changing radiator to a different typr"
NW10