Range from the cheapest Fit a new plug socket £90 (Kilo Volt Electrical Contractors Ltd based in TW5) to the dearest Fit a new plug socket £220 (ThePlumbers.org based in TW7).
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 TW4.