Range from the cheapest installation of a burglar alarm £150 (Sparks Electric based in W14) to the dearest installation of a burglar alarm £500 (BGE Developments Ltd based in W3).
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 Chiswick by posting a job with HaMuch and we will send it to electricians in Chiswick.