Range from the cheapest fitting of a smart camera doorbell £37 (May Electrical based in S20) to the dearest fitting of a smart doorbell £111 (Robix Electrix based in S60).
Comparing electricians estimates for fitting a smart Ring style doorbell 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 fit a smart WiFi doorbell in S13 by posting a job with HaMuch and we will send it to electricians in S13.