Range from the cheapest window sill replacement £240 (Aquatec Builder based in OL10) to the dearest window sill replacement £600 (D WARNE JOINERS based in OL16).
Comparing carpenter & joiners estimates for replacing a window sill 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 replace a window sill in OL15 by posting a job with HaMuch and we will send it to carpenter & joiners in OL15.