Range from the cheapest replacement of a door frame £140 (Constantina Locksmith based in N15) to the dearest replacement of a door frame £280 (TICO Builder Solutions based in N5).
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 N7 by posting a job with HaMuch and we will send it to carpenter & joiners in N7.