Range from the cheapest cat flap installation £96 (C A Miller Carpentry based in EN2) to the dearest cat flap installation £160 (CLASSIC CARPENTRY based in EN1).
Comparing carpenter & joiners estimates for installing a cat flap 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 fit a cat flap in EN3 by posting a job with HaMuch and we will send it to carpenter & joiners in EN3.