Range from the cheapest installation of a burglar alarm £85 (Energy North Ltd based in N11) to the dearest installation of a burglar alarm £400 (Volt based in N2).
Comparing electricians estimates for fitting a burglar alarm 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 a downstairs toilet in N11 by posting a job with HaMuch and we will send it to electricians in N11.