Range from the cheapest cat flap installation £60 (Mat plastering based in S35) to the dearest cat flap installation £120 (C.T Joinery & Solidsurface based in WF2).
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 S36 by posting a job with HaMuch and we will send it to carpenter & joiners in S36.