Range from the cheapest replacement of a door frame £180 (Stoyanov Carpentry based in CR2) to the dearest replacement of a door frame £350 (Dara Builders based in SM5).
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 CR3 by posting a job with HaMuch and we will send it to carpenter & joiners in CR3.