Range from the cheapest price to Unblock a sink £100 (South London Gas and Heating based in SE19) to the dearest cost to Unblock a sink £170 (1977 - Denham Plumbing and Gas based in SE26).
Comparing plumbers estimates for unblocking a sink 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 unblock a sink in SE21 by posting a job with HaMuch and we will send it to plumbers in SE21.