Range from the cheapest fitting of a smoke alarm £44 (AJP Air-Conditioning Services based in HP1) to the dearest fitting of a smoke alarm £165 (RJ Electricians Ltd based in LU7).
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 HP4 by posting a job with HaMuch and we will send it to electricians in HP4.