Range from the cheapest installation of a burglar alarm £250 (I Rewire based in ML3) to the dearest installation of a burglar alarm £267 (2 Core Electrics based in ML11).
Comparing fire & security specialists 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 ML9 by posting a job with HaMuch and we will send it to fire & security specialists in ML9.