Range from the cheapest cat flap installation £72 (Stoyanov Carpentry based in CR2) to the dearest cat flap installation £320 (Psd buildingservices based in CR0).
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 CR6 by posting a job with HaMuch and we will send it to carpenter & joiners in CR6.