The 15 Most Common Homeowners Insurance Exclusions

1. Flood Damage

Flood damage is the single most expensive and most misunderstood exclusion. Your homeowners policy does not cover any damage caused by flooding, which the insurance industry defines as water that enters your home from outside at ground level or below. This includes river overflow, storm surge, heavy rain pooling, and mudflow. Flood damage requires a separate flood insurance policy, available through the National Flood Insurance Program (NFIP) or private flood insurers. NFIP policies cover up to $250,000 for the dwelling and $100,000 for contents. Many homeowners in flood-prone areas are required by their mortgage lender to carry flood insurance, but even homeowners outside designated flood zones face real flood risk, as roughly 25% of all flood claims come from low-to-moderate risk zones.

2. Earthquake Damage

Earthquakes, along with all other forms of earth movement, are excluded from the standard homeowners policy. This means no coverage for damage from seismic shaking, ground rupture, or the settling and cracking that follows an earthquake. Separate earthquake insurance is available through private insurers and state-run programs like the California Earthquake Authority (CEA). Earthquake policies typically carry high deductibles, often 10% to 25% of the dwelling coverage amount, so even with coverage in place, a homeowner may face tens of thousands in out-of-pocket costs. In the Pacific Northwest, California, the New Madrid fault zone, and parts of the Mountain West, earthquake coverage should be considered essential rather than optional.

3. Earth Movement

Beyond earthquakes, the earth movement exclusion covers landslides, sinkholes, subsidence, mudflow (with a narrow exception for volcanic mudflow), erosion, and soil settling. If your foundation cracks because the ground beneath it shifted, or if a hillside slides into your home, the standard policy does not pay. This exclusion is particularly relevant in states with karst geology (Florida, Texas, Tennessee, Kentucky) where sinkholes are common, and in coastal or hillside areas where erosion and landslides threaten homes. Sinkhole coverage and mine subsidence coverage are available as endorsements or separate policies in some states.

4. Sewer and Drain Backup

When water backs up through your sewer line, floor drain, or sump pump and floods your basement or ground floor, your standard homeowners policy excludes the damage. This exclusion catches many homeowners by surprise because sewer backups are common, with millions of backup incidents occurring annually in the United States. The average cleanup and repair bill for a sewer backup ranges from $7,500 to $15,000, and severe cases can exceed $25,000. A sewer backup endorsement is available from most insurers for $40 to $70 per year and is one of the most cost-effective coverage additions available.

5. Water Seepage and Groundwater

Water that enters your home through the foundation, basement walls, or below ground level is excluded even when it is not technically a "flood." Hydrostatic pressure from a rising water table, condensation, and seepage through porous foundation walls are all considered maintenance or site drainage issues rather than insurable events. This exclusion is separate from both the flood exclusion and the sewer backup exclusion, meaning it applies even if you have flood insurance and a sewer backup endorsement. Proper grading, foundation waterproofing, and sump pump maintenance are the homeowner's responsibility.

6. Gradual Damage and Wear

Insurance covers sudden and accidental damage, not damage that accumulates slowly over time. A pipe that bursts suddenly during a freeze is covered. A pipe that has been dripping behind a wall for six months, rotting the framing and promoting mold growth, is not. The same principle applies to a roof that gradually deteriorates, a foundation that slowly settles, or paint that peels from weathering. The insurer's position is that gradual damage is detectable and preventable through routine maintenance, making it the homeowner's responsibility. This exclusion is the basis for many disputed claims, especially when the homeowner argues they had no way to know the damage was occurring.

7. Maintenance and Neglect

Closely related to the gradual damage exclusion, the maintenance exclusion denies coverage for damage that results from the homeowner's failure to maintain the property. If you do not clean your gutters and water overflows into the soffit, the resulting rot is excluded. If you ignore a small roof leak and it eventually causes ceiling collapse, the insurer can deny the claim on the grounds that timely repair would have prevented the loss. Insurers use this exclusion aggressively, and it applies broadly to any damage that could have been prevented by ordinary upkeep.

8. Mold

Most homeowners policies either exclude mold damage entirely or limit coverage to $5,000 to $10,000 per occurrence. When mold results directly from a covered loss (such as mold that grows after a covered burst pipe), the limited mold coverage may apply. When mold results from humidity, poor ventilation, or undetected leaks, no coverage applies. Professional mold remediation for a moderate infestation costs $10,000 to $30,000, and severe cases involving structural removal can exceed $50,000. The gap between typical mold coverage limits and actual remediation costs is one of the largest dollar-amount gaps in residential insurance.

9. Pest Infestation

Damage from insects, rodents, birds, and other vermin is excluded from every standard homeowners policy. Termites, carpenter ants, powder post beetles, mice, rats, bats, raccoons, and bed bugs are all excluded. Termites alone cause approximately $5 billion in property damage annually in the United States. The insurance industry classifies pest damage as a maintenance issue because regular inspections and preventive treatments can control infestations. If termites eat through your floor joists over several years, the entire repair bill falls on you. Annual termite inspections ($75 to $150) and preventive treatments ($200 to $500 per year) are far cheaper than the alternative.

10. Intentional Damage

Any damage caused deliberately by an insured person is excluded. This applies to all named insureds on the policy, so if one household member intentionally damages the home, the claim is denied even if other household members did not participate. The intentional loss exclusion prevents insurance from being used to profit from self-inflicted damage, which would undermine the entire insurance system. Some states have carved out protections for "innocent co-insureds" in arson cases, allowing a spouse who did not participate in setting a fire to recover their share of the policy. But these protections vary by state and are not universal.

11. Nuclear Hazard

Any loss resulting from nuclear reaction, radiation, or radioactive contamination is excluded. This exclusion has been part of homeowners policies since the 1950s and reflects the insurance industry's position that nuclear risk is uninsurable through private markets due to the potentially catastrophic and widespread nature of nuclear events. The federal Price-Anderson Nuclear Industries Indemnity Act provides a liability framework for nuclear accidents involving licensed facilities, but homeowners have no private insurance option for nuclear damage to their property.

12. Government Action

If the government seizes, confiscates, or destroys your property, the standard homeowners policy does not pay. This includes eminent domain (where the government takes private property for public use), condemnation of unsafe structures, and destruction ordered for public safety reasons (such as demolishing a building to create a firebreak during a wildfire). The Fifth Amendment requires the government to provide "just compensation" for eminent domain takings, but disputes over what constitutes fair value are common, and the process can take years.

13. War and Civil Unrest

Damage from war, military action, armed conflict, insurrection, rebellion, revolution, and civil unrest is excluded. This exclusion is rarely invoked in the United States but remains in every policy as a standard industry provision. Commercial policies have similar exclusions, with the Terrorism Risk Insurance Act providing some federal backstop for terrorism-related losses in commercial lines, but the residential war exclusion has no comparable federal program.

14. Power Failure

When a power failure originates off your property (at the utility company, on the transmission lines, or at a substation), resulting damage to your home's contents and systems is excluded. If a widespread power outage causes your refrigerator food to spoil or your sump pump to stop working and your basement floods, the standard policy does not cover the loss. However, if a power surge caused by lightning strikes your property directly, resulting damage is usually covered under the lightning peril. The distinction between on-premises and off-premises power events creates a gray area that generates claim disputes.

15. Ordinance or Law

When a covered loss triggers mandatory building code upgrades, the standard policy does not pay for the portion of repairs needed to meet current code. If a fire destroys part of your 1970s home and the city requires you to bring the plumbing, electrical, and insulation up to 2026 standards as a condition of the repair permit, the code upgrade costs are excluded. For older homes, this can add 20% to 50% to the cost of a covered repair. An ordinance or law endorsement, sometimes called "building code coverage," fills this gap and is highly recommended for any home older than 20 years.