Range from the cheapest installation of a burglar alarm £180 (Ridgelake based in DA17) to the dearest installation of a burglar alarm £360 (Mr Kilowatt based in SE28).
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 SE28 by posting a job with HaMuch and we will send it to electricians in SE28.