Who To Call To Fix Leaks Under Sinks

This article was created using automation technology and thoroughly fact-checked and edited by HomeAdvisor Editor Ryan Noonan.

If you're wondering who to call to fix a leak under the sink, a local sink repair pro is the right first step. Left alone, leaks can lead to mold, mildew, dry rot, and damaged subflooring. Licensed and insured pros have the tools and training to diagnose and fix the source. This hiring guide helps you compare sink repair contractors, plumbers, and qualified handypeople.

Benefits of Hiring a Sink Repair Pro for Under-Sink Leaks

A sink repair pro handles all types of sink repairs and pinpoints where the leak begins—whether in a pipe, the sink, or a connection. The best contractors are licensed and insured and arrive with the right tools for any repair. They deliver fixes that stop the dripping and advise when a faucet or sink needs replacing. Some also offer related services if cabinets are water-damaged.

Benefits include:

• Diagnose leak source quickly and accurately

• Licensed and insured for homeowner protection

• Right tools on hand for any repair

• Handle faucet repairs and minor leak fixes

• Clear clogs and address P-trap issues

• Advise when faucet or sink replacement is needed

• Reduce risk of recurring leaks and damage

• May coordinate related repairs if cabinets are ruined

Can I Hire a Plumber for an Under-Sink Leak?

Plumbers address larger or more complex plumbing problems and can install new plumbing systems, while many sink repair contractors focus on installations, clearing clogs, faucet repairs, and minor leak fixes. Some sink repair contractors are also licensed plumbers, though pricing and availability differ from specialists. Handypeople can repair minor leaks if their skills match the job.

If a project requires a licensed contractor or permits, confirm credentials—otherwise, hire a licensed sink repair company. If the leak is extensive or you’re unsure of the source, you might want to consider a local plumber to ensure the job is done safely and correctly.

How Do Pros Fix an Under-Sink Leak?

Here is how the repair process usually works from start to finish:

1. Prep: Turn off water to the faucet. Clear the cabinet and mop up standing water to create a safe workspace.

2. Diagnose: The pro inspects seals and connections, then fills and drains the sink to watch for drips and locate the source.

3. Repair: Depending on severity, they replace worn washers or O-rings, tighten connections, clear or replace the P-trap, address supply line issues, or recommend a new faucet or sink.

4. Retest: After repairs, they run and drain the sink again to confirm there are no more drips.

5. Restore and monitor: Once the area is dry, you can return items to the cabinet and watch for unexplained water until you are confident the fix holds.

How Much Does Repairing a Leak Under the Sink Cost?

Hiring a pro to fix a leak under your sink costs $50 to $200 per hour, depending on the type of pro and the extent of your repair. Some leaks repairs may have greater costs if they've caused wider water damage or mold problems.