Range from the cheapest installation of a burglar alarm £150 (Elmark Ltd based in SE20) to the dearest installation of a burglar alarm £595 (Bromley handyman based in BR2).
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 BR3 by posting a job with HaMuch and we will send it to electricians in BR3.