Range from the cheapest window sill replacement £300 ( based in SO18) to the dearest window sill replacement £800 (I Gas Engineers Ltd. based in PO15).
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 PO32 by posting a job with HaMuch and we will send it to carpenter & joiners in PO32.