Range from the cheapest Fit a new plug socket £110 (T K Electrics based in EN1) to the dearest Fit a new plug socket £150 (NFC Construction Limited based in EN3).
Comparing electricians estimates for a Fit a new plug socket 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 by posting your job to fit a plug socket to electricians in Ponders End.