Water damage: what it costs, and whether you're covered
With water claims the amount is the second question. The first is what caused it — because a burst pipe is paid and the identical damage from a slow leak is not. This tool models both: the restoration cost, and whether your cause of loss is one a standard policy actually covers.
Water Damage Claim Calculator
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Planning estimate only. Not a claim valuation, coverage determination, or legal or insurance advice. Your policy wording governs. See how we calculate this.
The short answer
Whether your water damage is covered depends on the cause, not the amount. Sudden and accidental discharge — a burst supply line, a failed washer hose, rain through storm damage — is covered. Gradual leaks, seepage, sewer backup and flood are not under a standard policy. A contained clean-water loss of about 400 sq ft typically costs $3,000 to $8,000 to put right; add sewage, saturated subfloor, cabinetry and mold and the same footprint passes $25,000.
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What is covered and what is not
Water is the most common non-weather homeowners claim, and also the one most often denied. The dividing line is always the same: sudden and accidental versus gradual or excluded.
| Cause | Standard policy | Notes |
|---|---|---|
| Burst supply line or pipe | Covered | The damage is covered; the pipe itself usually is not |
| Appliance failure | Covered | If sudden. An old weeping water heater may be called maintenance |
| Rain through storm damage | Covered | Only if a covered peril opened the building first |
| Overflowing bath or sink | Covered | Accidental overflow is a covered discharge |
| Slow leak over weeks | Excluded | The most common denial of all |
| Sewer or drain backup | Excluded | Needs the water backup endorsement |
| Flood, rising water | Excluded | Needs separate NFIP or private flood policy |
| Groundwater seepage | Excluded | Treated as surface water or earth movement |
Two exclusions that surprise people every single time
Flood is never covered by a homeowners policy — not partially, not with an endorsement, not as an exception. It needs a separate flood policy, and those carry a 30-day waiting period, so it cannot be bought once a storm is on the forecast.
Sewer backup is not covered either unless you specifically bought the water backup endorsement. It costs $50 to $150 a year and is capped, often at $5,000 to $25,000. A sewage backup is a Category 3 loss requiring removal of every affected porous material, so that cap is frequently exhausted. If you have a basement, this endorsement is the cheapest meaningful protection you can buy.
The three water categories
The restoration industry classifies water by contamination, and it drives both cost and what can be saved rather than thrown away.
- Category 1 — clean water. From a supply line or tap. No health risk at first. Most materials can be dried in place. But Cat 1 degrades to Cat 2 within roughly 48 hours as it picks up contaminants, which is why speed matters financially as well as practically.
- Category 2 — grey water. From a washing machine, dishwasher or overflowed toilet with no solids. Carries contamination. Carpet pad and drywall usually come out; carpet may be salvageable if treated fast.
- Category 3 — black water. Sewage, floodwater, or any water that has stood long enough to become grossly contaminated. Every affected porous material is removed and discarded — carpet, pad, drywall, insulation, particleboard. This is why the same square footage costs two to three times more.
What restoration actually costs
Mitigation — extraction, drying equipment, antimicrobial treatment — is priced per square foot and billed separately from reconstruction.
| Line item | Cost |
|---|---|
| Emergency response & assessment | $250–$600 |
| Mitigation — Category 1 | $3.00–$7.00 / sq ft |
| Mitigation — Category 2 | $4.50–$9.50 / sq ft |
| Mitigation — Category 3 | $7.00–$15.00 / sq ft |
| Drywall removal & replacement | $2.00–$5.00 / sq ft |
| Carpet & pad | $3.00–$6.50 / sq ft |
| Vinyl / LVP | $3.50–$7.50 / sq ft |
| Laminate | $4.00–$8.00 / sq ft |
| Hardwood | $8.00–$16.00 / sq ft |
| Tile | $8.00–$18.00 / sq ft |
| Subfloor replacement | $3.00–$8.00 / sq ft |
| Cabinetry | $200–$600 / linear ft |
| Mold remediation | $10–$30 / sq ft |
| Contents pack-out & cleaning | $500–$3,000 |
The line that most often gets missed on a first estimate is subfloor. Water travels under flooring and wicks into particleboard or OSB, which swells and never recovers. It is invisible until the flooring comes up, so an estimate written before demolition frequently omits it. Expect a supplement.
Mold: the separate cap nobody reads
Two things about mold catch homeowners out.
First, mold coverage is usually capped separately from your dwelling limit — commonly $5,000 or $10,000, sometimes as low as $1,000. That cap applies even when your dwelling coverage is $400,000.
Second, mold is only paid when it resulted from a covered water loss and you acted promptly. Mold traced to a gradual leak, to humidity, or to a delay in drying is excluded. This is precisely why the 24 to 48 hour window matters: it is not only a health question, it determines whether the remediation is paid for.
The first 48 hours
- Stop the source. Main shut-off if it is a supply line. Know where yours is before you need it.
- Photograph everything before you move anything. Wide shots and close-ups, with standing water visible. This is the evidence your claim rests on, and once you have cleaned up it cannot be recreated.
- Call your insurer and open the claim. Prompt notice is a policy condition.
- Call a restoration company. They can start mitigation before the adjuster arrives — insurers expect this, because delay costs them more than it costs you.
- Mitigate, do not repair. Your duty is to prevent further damage: extract water, run fans, remove soaked contents. Do not start rebuilding before the adjuster has seen it.
- Keep every receipt, including fans, dehumidifiers and a hotel if the home is unlivable. Loss of use is a coverage you have already paid for.
- Keep a sample of removed material and the failed component. If the insurer later argues the failure was gradual, that pipe section is your evidence.
Why water claims get denied
- "Long-term seepage." The most common denial by a distance. The insurer argues the leak existed for weeks, making it maintenance rather than a sudden event. Photographs, the failed component and a plumber's written opinion on the mode of failure are what rebut it.
- Late notice. Reporting weeks later invites the argument that the damage spread because of your delay.
- Failure to mitigate. If you did nothing for a week, the additional damage in that week may be excluded even on an otherwise covered loss.
- Wrong peril. Groundwater called a burst pipe, or a sewer backup on a policy with no backup endorsement.
- Vacancy. Most policies restrict coverage if the home was unoccupied beyond 30 to 60 days — a common issue with second homes and burst pipes in winter.
- Maintenance exclusions. A water heater past its service life, known but unrepaired plumbing, a roof already at end of life.
If your claim is underpaid rather than denied, the route is the same as for any property claim: compare the scope line by line against your contractor's estimate, submit a written supplement with evidence, and if you still disagree on the amount, most policies contain an appraisal clause. Our hail claim guide sets out that process in full — it applies identically here.
Frequently asked questions
Does homeowners insurance cover water damage?
It depends entirely on the cause, not the amount. Sudden and accidental discharge is covered: a burst supply line, a failed washing machine hose, rain entering through storm damage. Gradual leaks, seepage, flood and sewer backup are excluded from a standard policy. The most common denial is the insurer classifying the loss as long-term deterioration rather than a sudden event.
How much does water damage restoration cost?
A contained clean-water loss of around 400 square feet typically runs $3,000 to $8,000 including extraction, drying, drywall and flooring. Category 3 black water, saturated subfloor, cabinetry and mold remediation can push the same footprint past $25,000. Mitigation alone runs $3 to $7 per square foot for clean water and $7 to $15 for sewage.
Is flood damage covered by homeowners insurance?
No. Flooding from rising surface water is excluded by every standard homeowners policy in the United States without exception. Flood coverage requires a separate NFIP or private flood policy, and most carry a 30-day waiting period, so it cannot be bought once a storm is forecast.
Is sewer backup covered?
Not under a standard policy. It requires a water backup endorsement, typically $50 to $150 a year and capped, commonly at $5,000 to $25,000. Since a sewage backup is a Category 3 loss requiring full removal of affected porous materials, that cap is often reached.
How much does mold remediation cost?
Roughly $10 to $30 per square foot of affected area, so a contained bathroom might be $500 to $1,500 while a saturated basement can exceed $10,000. Most policies cap mold coverage separately, often at $5,000 to $10,000, and only pay it when the mold resulted from a covered water loss.
How quickly do I need to act after water damage?
Immediately. Mold can begin establishing within 24 to 48 hours on wet porous materials. Every policy also imposes a duty on you to mitigate further damage, and an insurer can reduce a claim for damage that spread because you delayed. Stop the source, photograph everything before moving anything, and call a restoration company.
Will a water claim raise my premium?
More than a weather claim will. Water is the most frequent non-weather homeowners claim and insurers treat it as predictive of future losses. A single water claim commonly raises a premium by around 20 percent for three to five years. See our homeowners insurance calculator for how claims history is priced.
Who pays for the failed pipe itself?
You do, in most cases. The policy covers the resulting damage to your home and contents, not the component that failed. If a supply line bursts and floods a kitchen, the drying, drywall, cabinets and flooring are covered but the replacement pipe is not. Many policies do cover tearing out and replacing the wall or floor needed to reach it.
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