Does homeowners insurance cover a flooded basement?

It depends on the source. If water flooded the basement because of a burst pipe or a sudden appliance failure inside the home, it is usually covered. If it came from rising groundwater, heavy rain, or surface runoff outside, that is a flood and is excluded unless you carry separate flood insurance. A sewer or drain backup needs its own endorsement.

Is a leaking roof covered by homeowners insurance?

A roof leak from sudden, accidental damage, such as a storm that tears off shingles, is generally covered, along with the interior water damage that follows. A roof that leaks because it is old, worn out, or was never maintained is considered a maintenance issue and is typically excluded.

Why isn't flood damage included in my policy?

Flood risk is treated separately across the entire insurance industry, which is why standard homeowners policies exclude it and flood coverage is sold on its own, primarily through FEMA's National Flood Insurance Program and some private insurers. A homeowners policy will not satisfy a lender's flood insurance requirement.

Does insurance cover mold from water damage?

Sometimes, but only when the mold results from a covered, sudden event that you addressed promptly, and even then coverage may be limited or capped. Mold that grows from a slow leak, ongoing dampness, or deferred maintenance is generally excluded. Some insurers sell a limited mold endorsement.

How do I add sewer backup coverage?

Ask your insurer to add a sewer and drain backup endorsement to your existing homeowners policy. It is usually available for a modest add-on premium and is one of the more valuable coverages to have if you have a finished basement or a sump pump.

Does homeowners insurance cover water damage?

Updated 2026-06-26 · This article is for general educational information only and is not insurance advice.

Water damage is one of the most common and most misunderstood homeowners insurance claims. The short answer: a standard HO-3 policy usually covers water damage that is sudden and accidental and comes from inside your home, but it does not cover flooding from outside, it does not cover sewer backups unless you have added that coverage, and it does not cover slow leaks or anything tied to poor maintenance. The source of the water and how fast it appeared matter far more than the size of the puddle on your floor.

This guide walks through the situations homeowners ask about most, so you can tell at a glance whether a particular kind of water damage is likely covered, needs an endorsement, or is excluded entirely. Everything below assumes a standard HO-3 policy, which is the most common form sold in the United States.

Is a burst pipe or appliance overflow covered?

Yes. Sudden, accidental water that escapes from inside your home's plumbing or appliances is one of the things a standard HO-3 policy is built to cover. This is the core scenario most people mean when they ask about water damage.

Standard policies cover the accidental discharge or overflow of water from a plumbing, heating, air conditioning, or fire-sprinkler system, or from a household appliance. In plain terms, that means a pipe that bursts, a washing machine hose that lets go, a dishwasher that overflows, or a water heater that suddenly ruptures and floods the room. Frozen pipes that burst in a cold snap are generally covered too, as long as you took reasonable steps to keep the house heated. The damage to your floors, walls, and belongings from that water is typically covered, though the policy usually will not pay to fix the pipe or appliance that failed, only the resulting water damage.

Does homeowners insurance cover flood damage?

No. Flooding, defined as rising water that comes from outside your home, is excluded from every standard homeowners policy. If you want protection, you need a separate flood policy.

This is the single most important distinction in this whole topic. A flood means water that comes up from the ground or in from outside: an overflowing river, a storm surge, heavy rain that pools and rises, or runoff and snowmelt collecting around your foundation. None of that is covered by your HO-3 policy, no matter how it gets in. Flood coverage is sold separately, most often through the National Flood Insurance Program (NFIP) run by FEMA, and also through some private flood insurers. NFIP policies have their own structure, including separate building and contents coverage and federal coverage limits, and there is typically a waiting period before a new policy takes effect, so this is not something you can buy the day a storm is forecast. If your home sits in a high-risk flood zone and you have a government-backed mortgage, your lender will usually require it.

Is sewer or drain backup covered?

Not by default. Water that backs up through your sewer line, drains, or a failed sump pump is generally excluded from a standard policy, but you can add it with a low-cost endorsement.

Sewer and drain backup is a gap that surprises a lot of homeowners. When water comes up through a floor drain or backs into the house from a clogged or overwhelmed municipal sewer line, that is neither the covered burst-pipe scenario nor a flood, so a standard HO-3 policy leaves it out. The fix is a sewer and drain backup endorsement, which most insurers offer for a modest add-on premium. If you have a finished basement, a sump pump, or live on a street where backups happen, this is one of the most worthwhile pieces of coverage to ask about. It is added to your existing policy rather than bought separately the way flood insurance is.

Are slow leaks, seepage, and mold covered?

Usually not. Damage that builds up gradually from a long-running leak, seepage, or deferred maintenance is excluded, and the mold that grows as a result is typically excluded along with it.

Insurance is designed for sudden, unexpected events, not for problems that develop slowly over weeks, months, or years. A drip under the sink you ignored, water that seeps in through a foundation crack, a roof you never repaired, or a pipe that has been leaking behind a wall for a long time all fall on the excluded side of the line. Because it is your responsibility to maintain your home, insurers can deny claims they trace back to neglect or wear and tear. Mold follows the same logic: if it grows because of a covered sudden event, like a burst pipe you reported and cleaned up promptly, there may be limited coverage, but mold that results from a long-ignored leak or general dampness is generally not covered. Some insurers offer a limited mold endorsement, often with its own cap.

What's the difference between sudden and gradual damage?

Sudden and accidental damage is usually covered; gradual, expected, or maintenance-related damage is usually excluded. The cause and timeline of the water are what decide a claim.

It helps to picture a single dividing line. On the covered side sit events that happen quickly and without warning: the pipe that bursts overnight, the water heater that lets go, the supply hose that suddenly splits. On the excluded side sit anything slow or foreseeable: seepage, long-term leaks, rot, and the consequences of skipped maintenance, plus flooding from outside and unendorsed sewer backups. One more detail worth knowing is how your insurer values what it does pay for. Some policies pay replacement cost, which covers what it costs to replace damaged property new, while others pay actual cash value, which subtracts depreciation for age and wear. That difference can significantly change the size of a check on the same covered loss, so it is worth confirming which one your policy uses.

How to make sure you're actually covered

Because water damage coverage is split across three different places, a standard policy, a flood policy, and a backup endorsement, the only reliable way to know where you stand is to look at all three together. Read your declarations page to confirm what your HO-3 covers, ask whether you have a sewer and drain backup endorsement, and check whether your location calls for a separate flood policy. The fastest way to find the gaps is to compare coverage options side by side and see what each one includes before you need to file a claim.

Not sure how much coverage you need? Try our coverage calculator, or see what homeowners insurance covers.