Range from the cheapest price to Unblock a sink £80 (Absolute Tradesmen based in W5) to the dearest cost to Unblock a sink £170 (FD Plumbing & Heating based in W4).
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 W4 by posting a job with HaMuch and we will send it to plumbers in W4.

"Unblock a bathroom sink"
W3