Range from the cheapest installation of an outside power socket £94 (Octopus Energy Services Ltd based in W1D) to the dearest installation of a garden power socket £150 (LUCO - London Utility Company based in W1W).
Comparing electricians estimates for installing an outside RCD 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 to install an outside power socket in Soho by posting a job with HaMuch and we will send it to electricians in Soho.