Range from the cheapest installation of a burglar alarm £250 (MH Electrics based in sw10) to the dearest installation of a burglar alarm £500 (Novalux Electrical Services Ltd based in SW1Y).
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 SW1X by posting a job with HaMuch and we will send it to electricians in SW1X.