Range from the cheapest window sill replacement £440 (Shape London based in SE1) to the dearest window sill replacement £1000 (BNL-RO LTD based in n1).
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 Old Broad Street by posting a job with HaMuch and we will send it to carpenter & joiners in Old Broad Street.