Range from the cheapest cat flap installation £100 (ADAM DARNTON CARPENTRY based in TW18) to the dearest cat flap installation £200 (A.S Electrics based in SL3).
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 SL4 by posting a job with HaMuch and we will send it to carpenter & joiners in SL4.