Range from the cheapest fitting of a smoke alarm £54 (SE9 Electrical based in SE9) to the dearest fitting of a smoke alarm £154 (Scott Kyte based in DA7).
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 DA16 by posting a job with HaMuch and we will send it to electricians in DA16.