How Much for Plumber to Unclog Drain? Nationwide, it costs about $200.00 to hire a plumber to unclog a drain in your sink or shower. The cost may vary depending on the severity of the clog. Additionally, trip charges may be higher for emergency calls. By ProMatcher Staff Updated: 12/16/2016 Get Free Quotes Today! Free Quotes from Plumbers » Average Cost to Unclog Drain Seattle, WA $142.04 - $173.91 Free Plumbing Service Cost Estimates Having trouble finding a plumber? We're here to help. Use our matching service to get free price quotes from local plumbing contractors. Get Free Quotes Today! Find Local Pros Free Clearing Drain Clog or Blockage Cost Estimates Related Questions Can French Drains Be Cleaned Out?Top answer: In some cases How Much Does it Cost to Repipe a House with PEX? Does Toilet Flange Need to Be Level?Top answer: Yes Can a Basement Floor Drain Be Used for a Toilet?Top answer: No How Much for Plumber to Replace Wax Ring?