Leaking sinks are among the most common plumbing headaches for homeowners. In many cases, a leak points to worn seals, corroded pipes, or a poorly seated drain, but the exact fix depends on the source of the problem.

What causes a sink to leak

Leaks can originate at faucet seals, supply lines, or the drain assembly. Over time, gaskets can dry out, connections can loosen, and corrosion can develop in metal pipes. A persistent drip may also indicate hidden water damage behind cabinets or under the sink.

When to call a professional

If you notice active leaks, standing water, or damp stains near the base of the cabinet, it’s wise to contact a licensed plumber. Quick action helps prevent mold growth and structural damage. If multiple fixtures share a problem, a broader plumbing issue may be involved.

What sink repair services typically include

Professional services usually start with a diagnostic inspection, followed by replacement of faulty seals, hoses, or valves. Technicians may repair or replace faucets, tighten connections, fix drainage problems, and reseal under-sink areas to prevent future leaks. Warranties are often available for parts and labor.

Cost and timeline

Average repair costs vary by the leak source and parts needed but typically range from moderate to significant depending on whether a simple seal replacement or a pipe rerouting is required. Most jobs can be completed in a few hours to a day, with some extensive repairs taking longer.

DIY tips for temporary relief

For small, non-emergency leaks, you can shut off the under-sink valve to stop water flow while awaiting a repair. Avoid using the sink until a professional confirms the fix, and keep an eye on potential water damage or mold.

Choosing a sink repair professional

Look for licensed plumbers with transparent estimates, clear warranties, and recent customer reviews. Ask about parts guarantees, service guarantees, and whether the quote includes potential hidden costs.