Range from the cheapest replacement of a door frame £130 (Building and Plastering Solution based in SE5) to the dearest replacement of a door frame £380 (SOLID CARPENTRY LTD based in EC1V).
Comparing carpenter and 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 Guildhall by posting a job with HaMuch and we will send it to carpenter and joiners in Guildhall.

"New door frame"
UK
"Move door frame from current position - back inside masonry frame - allowing for a larger NEW door to be fitted"
N1