Range from the cheapest window sill replacement £20 (Ghani Constructions based in IG1) to the dearest window sill replacement £600 (Golden Hands Handyman based in E7).
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 Gants Hill by posting a job with HaMuch and we will send it to carpenter & joiners in Gants Hill.