Range from the cheapest installation of a downstairs guest toilet £850 (Nat gas based in BR3) to the dearest installation of a downstairs guest toilet £1250 (1977 - Denham Plumbing and Gas based in SE26).
Comparing bathroom fitters estimates for fitting a downstairs toilet 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 Penge by posting a job with HaMuch and we will send it to bathroom fitters in Penge.