Does Home Insurance Cover Water Damage Under a Sink?
Usually, if the leak was sudden, like a burst supply line. Gradual leaks or ignored drips are typically denied.
Free to compare
Why the leak under your sink matters more than the water itself
What decides your claim is how the leak started, not that it happened under the sink. A supply line that burst, a fitting that failed, a dishwasher hose that split while running. These count as sudden and accidental, so the policy's dwelling and personal property coverage typically pays to fix the cabinet, floor and anything damaged, minus your deductible. But if the cabinet floor is stained and soft, or you'd noticed the drip for weeks before it got bad, the insurer will likely call it gradual damage or a maintenance issue, and standard policies exclude both. Mold that grows out of either kind of leak gets its own limit, often capped lower than the rest of the claim, and your declarations page will show it. Shut off the water, dry the area, and photograph everything before you clean up.
One cabinet leak, two outcomes
Whether this gets paid depends on wording that varies by insurer, from how mold is capped to how gradual damage gets defined. Comparing policies now shows which one actually backs you up when a pipe fails.
What if the water came from the drain, not the supply line
A leak under the sink doesn't always come from the pipe bringing water in. Sometimes it's the drain line, or water backing up from further down the system. That distinction matters because a backed-up drain or sewer line is often treated separately from a burst supply line, even though both leave the same puddle under your cabinet. Standard homeowners policies typically exclude sewer and drain backup entirely unless you've added an endorsement for it, sometimes called water backup or sewer backup coverage. Check your declarations page for it by name. If it's not listed, a backup that floods your cabinet and floor may not be covered at all, regardless of how sudden it was.
Flood is a separate question again. If the water under your sink is part of a larger flood, meaning water entering from outside the house, from a storm or rising groundwater, that's excluded from a standard homeowners policy no matter how the leak under your sink looks on its own. Flood coverage is its own policy, usually through a separate flood insurance program. A cracked supply line and a flooded basement can happen in the same storm but get handled by two different policies, so don't assume one covers the other.
What you do in the first hour after finding the leak affects whether any of this gets paid. Turn off the water at the shutoff valve under the sink or at the main if you can't find it. Take photos of the cabinet, the floor, the pipe or hose that failed, and the standing water before you start drying anything out. Insurers send an adjuster to look at the damage and the source, and a claim is harder to deny when there's a clear record of what happened and when. Keep the failed part if you can, the cracked fitting or split hose, since it's often the evidence that settles whether this was sudden or something left to worsen.
Once water's been sitting for even a day or two, mold becomes a real possibility, and most policies cap what they'll pay for mold damage well below the rest of the claim. That cap applies whether the mold grew from a burst pipe or a slow drip, so a fast cleanup matters even when the underlying leak is clearly covered. If the area stays damp, run a fan or dehumidifier and consider having it tested before you close the cabinet back up.
What about a leaking water heater or appliance near the sink
A dishwasher or water heater that fails next to a sink muddies things because the water ends up in the same place a pipe leak would, but the cause is a different appliance with its own wear pattern. If the water heater's tank rusted through after years of use, or a dishwasher's internal seal wore out slowly, that's gradual deterioration, and it's excluded the same way a slow pipe drip is. If a hose or fitting on either appliance split suddenly while it was running, that's sudden and accidental, and the same dwelling and personal property coverage that handles a burst pipe should apply to the water damage. The appliance itself is a separate question. Most homeowners policies don't cover repairing or replacing the appliance that failed, only the damage it caused to your home and belongings, unless you've added equipment breakdown coverage.
Age works against you here. An insurer looking at a water heater that's twelve years old, well past its typical lifespan, is more likely to treat a failure as something that should have been caught and maintained, not a sudden accident. The same goes for a dishwasher supply line that's visibly corroded. If you've had small, ignored warning signs, a puddle after each cycle, a rust stain near the base, a musty smell from under the cabinet, that history can turn what looks like a sudden failure into a claim for gradual damage instead. Keeping up with basic maintenance, and replacing aging appliances before they fail, is less about preventing water damage and more about preserving your ability to claim it.
Whoever installed the appliance also matters more than people expect. If a plumber or installer did the work and something was hooked up wrong, leading to a later leak, that's sometimes recoverable from the installer or their insurance rather than your homeowners policy, especially if the failure happened soon after installation. Keep receipts and records of who installed or serviced any appliance near a water source. If a claim gets denied as gradual or as faulty workmanship, those records are what let you pursue the installer directly instead of absorbing the cost yourself.
Once the water's cleaned up and the appliance is replaced, check whether the new one qualifies for anything on your policy. Some insurers note upgrades like leak detection sensors or automatic shutoff valves on the declarations page, and installing one after a claim can be worth mentioning when you're comparing coverage or shopping for a new policy, since it changes how an insurer views the risk of it happening again.
Before you close that cabinet back up
Check your declarations page for water backup coverage and your mold limit, and photograph the leak source before cleanup. Those two things decide more about this claim than the water itself does.
