Range from the cheapest cat flap installation £76 (L&A Larisa and Andrea Limited based in N17) to the dearest cat flap installation £200 (Krystian based in E17).
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 E4 by posting a job with HaMuch and we will send it to carpenter & joiners in E4.