Range from the cheapest installation of a carbon monoxide alarm £34 (Ajm services based in M44) to the dearest installation of a carbon monoxide alarm £102 (Leverhome based in BL3).
Comparing electricians estimates for fitting a carbon monoxide detector 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 carbon monoxide alarm in BL4 by posting a job with HaMuch and we will send it to electricians in BL4.