Range from the cheapest fitting of a smoke alarm £64 (Sam electrical based in Nw1) to the dearest fitting of a smoke alarm £204 (Cousins Contractors Ltd based in EC1V).
Comparing electricians estimates for fitting smoke detectors 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 fire alarm in WC1B by posting a job with HaMuch and we will send it to electricians in WC1B.