Range from the cheapest replacement of a door frame £150 ( based in SO18) to the dearest replacement of a door frame £380 (Southern Bespoke Staircases based in SO18).
Comparing carpenter & joiners estimates for a new door frame 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 door frame in So by posting a job with HaMuch and we will send it to carpenter & joiners in So.