What Does Homeowners Insurance Not Cover? Exclusions Explained
You pay $1,200 a year for homeowners insurance, your basement floods, and the claim gets denied. Or an earthquake cracks your foundation and you discover your policy covers exactly nothing. Every standard HO-3 homeowners policy has a list of exclusions — situations and damage types it will not pay for — and most homeowners don’t know they exist until it’s too late.
The short answer
Homeowners insurance does not cover flood, earthquake, sewer backup, gradual damage (wear and tear, mold), intentional loss, business property, or high-value items without scheduled coverage. Coverage, rules, and pricing vary by state and insurer. Some of these gaps can be filled with optional add-ons or separate policies; others cannot be insured through standard homeowners coverage at all.
Why homeowners policies have exclusions
Insurance is designed to cover sudden, accidental losses — fire, theft, windstorm. It’s not maintenance coverage, and it can’t cover catastrophic risks where an entire region gets hit at once (flood, earthquake). Exclusions exist to prevent moral hazard (people deferring maintenance and then claiming insurance), to keep premiums affordable, and to separate insurable risks from uninsurable ones.
Standard HO-3 policies follow model language set by the NAIC (National Association of Insurance Commissioners), adopted by all U.S. states with minor variations. If an exclusion is listed in your policy, it applies unless state law mandates otherwise — which is rare.
The standard homeowners insurance exclusions
Here’s what every HO-3 policy excludes by default, why, and whether you can buy coverage separately.
Flood damage
Is flood covered by homeowners insurance? No. Flood is the single largest exclusion in homeowners insurance, and it is not covered under any circumstances in a standard HO-3 policy.
Why: A single flood event (Hurricane Harvey in 2017, Hurricane Katrina in 2005) can cost insurers $20 billion or more. Flooding is a correlated risk — if one house floods, the neighborhood floods. Insurers cannot spread that risk the way they spread fire or theft risk. Private carriers stopped offering flood coverage in the 1960s, which is why the federal government created the National Flood Insurance Program (NFIP) in 1968.
What “flood” means: Surface water from heavy rain, storm surge, overflowing rivers or streams, or snowmelt. It does not include burst pipes, leaks, or sewer backup — those are separate exclusions.
Who must buy flood insurance: If your home is in a Special Flood Hazard Area (SFHA) — FEMA flood zones A, AE, or V — your mortgage lender requires it. If you’re outside an SFHA, flood insurance is optional but strongly recommended if you’re near a floodplain. Check FEMA’s flood maps at fema.gov/flood-maps to see your zone.
Where to buy flood insurance:
- NFIP: The baseline option, available in all states. Premiums typically range from $500 to $3,000 per year for a standard dwelling, depending on flood zone, home age, and elevation. Check your specific quote before purchasing.
- Private flood insurance: Growing market (Lemonade, Homeowners Choice, others). Often $300–$2,000 per year. Private flood may be cheaper for low-risk homes and can offer higher coverage limits than NFIP in some cases.
Always compare NFIP and private quotes before buying. Roughly 15–20% of NFIP policyholders switch to private flood for savings or better coverage.
Important: Flood coverage does not cover sewer backup caused by heavy rain overwhelming the municipal sewer system. That requires a separate endorsement on your homeowners policy (see below).
For more detail, see what does the national flood insurance program nfip cover and private flood insurance vs nfip.
Earthquake and earth movement
Is earthquake covered? No. Standard HO-3 policies exclude earthquake, landslide, sinkhole, and any earth movement. You must buy a separate earthquake policy or endorsement if available in your state.
Why: Earthquake is a catastrophic, unpredictable risk with massive correlated losses. The 1994 Northridge earthquake in California cost insurers $15 billion. Private carriers won’t cover it at standard premiums, and when they do offer it, deductibles are extremely high (10–15% of your dwelling coverage).
Where earthquake coverage is available:
- California: California Earthquake Authority (CEA), a state pool. Private carriers rarely offer it. Costs typically $500–$2,500 or more per year with a 10–15% deductible.
- Oregon, Washington, Alaska, Hawaii: Some private insurers offer earthquake endorsements or separate policies. Availability and pricing vary by location and insurer.
- Utah, Idaho, Wyoming: Limited coverage; high-risk areas near the Wasatch Fault may have access through a few carriers.
- Midwest (New Madrid seismic zone — Missouri, Illinois, Tennessee): Very limited availability despite elevated seismic risk.
Earthquake insurance deductibles are high: If your home is insured for $500,000 and you have a 10% deductible, you pay the first $50,000 of damage out of pocket. This is intentional — earthquake insurance is catastrophic risk transfer, not full replacement cost. Insurers expect homeowners to self-insure moderate earthquakes.
Should you buy it? Strongly consider it if you’re in California, Oregon, or Washington with a pre-1980 home (older building codes, weaker foundations). Consider it carefully if you’re in Utah or the New Madrid zone. Likely unnecessary if you’re in a low-seismic state.
For California-specific guidance, see earthquake insurance california.
Sewer and water backup
Is sewer backup covered? No, not by default. Standard HO-3 policies exclude backup of sewers, drains, and sump pumps. You can add optional coverage for $75–$300 per year.
Why: Sewer backup is foreseeable and preventable with maintenance. You know your home has a sewer connection, and you can install a backwater valve or sump pump to reduce risk. Without this exclusion, people would skip maintenance and then claim insurance when the basement floods with sewage.
When sewer backup happens: Heavy rain or snowmelt overwhelms the municipal sewer system, and water backs up through floor drains in your basement. Or tree roots penetrate the sewer line (your responsibility, not the city’s). Damage is expensive — $10,000 to $50,000 in cleanup and repairs is typical.
Optional sewer backup endorsement:
- Limit: $1,000 to $5,000 (sometimes $10,000)
- Cost: $75 to $300 per year, depending on location and insurer
- Deductible: $250 to $500
- What’s covered: Sewage and drain backup from the public sewer or drain. Does not cover backups caused by lack of maintenance or flushing inappropriate items.
Important limitation: Many policies exclude loss if “caused by the negligence of others” — meaning if the city’s pipes fail, you may not be covered. Read the endorsement carefully and confirm what triggers coverage at your location.
Should you buy sewer backup coverage? Yes, if you have a basement (finished or unfinished), live in an older neighborhood with aging sewer lines, or have had a backup before. Perhaps, if you’ve already installed a backwater valve or sump pump (reduces risk; ask your insurer about a discount). No, if you’re on a septic system (different risk; ask about septic coverage instead) or have no lower-level exposure.
Prevention reduces the need for coverage:
- Install a backwater valve in the main sewer line ($1,500–$3,000 typical cost). Many insurers give a 10–15% discount if you have one.
- Install a sump pump ($500–$2,000 typical cost).
- Keep gutters clean and grade soil away from the foundation.
For discounts on prevention upgrades, see homeowners insurance discounts.
Wear and tear, rot, mold, and gradual damage
Homeowners insurance is for sudden, accidental losses. It is not maintenance coverage. Standard HO-3 policies exclude:
- Wear and tear, deterioration, rust, rot
- Mold (unless it results from a covered peril like a burst pipe — and even then, coverage is limited)
- Settling, cracking, or shrinking of foundations or walls
- Damage from insects, birds, rodents, or animals
The mold carve-out is strict: Many policies cap mold coverage at $2,500 to $5,000, even if mold results from a covered water loss. Some states (Texas, for example) cap mold coverage at $2,500 by law. If you live in a humid climate or a flood zone, ask whether your insurer offers a mold endorsement (rare, and often expensive).
Why this exclusion exists: Without it, people would defer maintenance and then claim insurance when the roof leaks or the foundation cracks. Insurers want you to maintain your home.
Intentional loss
Arson, vandalism by the policyholder, or any intentional damage is excluded. This is universal and non-negotiable. If you deliberately damage your own house, insurance will not pay — and you will face criminal charges.
Business property and home-based businesses
If you run a business from your home — even a small one — your homeowners policy does not cover business property, equipment, or liability. Standard HO-3 policies are for personal use only.
Examples of excluded business use:
- Home office (computer, office furniture, inventory)
- In-home daycare
- Renting a room on Airbnb
- Selling products or services from home
What you need: A Home-Based Business endorsement on your homeowners policy, or a separate Business Owners Policy (BOP). Cost varies widely ($100–$1,000+ per year) depending on the business type and size.
If you rent your home short-term (Airbnb, VRBO), you may also need short-term rental insurance. Standard homeowners policies often exclude coverage if you rent for fewer than 30 days at a time.
For business liability gaps, see do i need umbrella insurance.
High-value items (jewelry, art, collectibles, guns)
Standard HO-3 policies have sub-limits on high-value personal property:
- Jewelry: $1,000–$2,500 total
- Fine art: $1,000–$5,000 total
- Guns and firearms: $2,500 total
- Cash: $200–$500 total
- Electronics: Often capped at $2,500–$5,000 total
These limits vary by insurer and state. If you own valuables above these limits, you need a scheduled personal property endorsement (also called a “floater”). You list each item with an appraisal, and the insurer covers it for its full appraised value, often with no deductible.
Cost: $1–$2 per $100 of insured value per year (varies by item and insurer). Example: Insuring a $10,000 engagement ring costs $100–$200 per year.
Loss of use and rental income
Standard HO-3 policies cover additional living expenses (ALE) if your home becomes uninhabitable due to a covered loss (fire, windstorm). ALE pays for temporary housing, meals, and storage while repairs are made.
But HO-3 does not cover:
- Lost business income if you run a business from home
- Lost rental income if you rent part of your home
- Increased cost of living that isn’t directly tied to displacement
If you rent part of your home or run a business, ask about a loss of rental income or business interruption endorsement.
Wind and hail (in coastal or high-wind areas)
In some coastal and high-wind states, wind and hail are excluded or carved out of standard HO-3 policies. You must buy a separate windstorm policy from a state pool or private carrier.
States with wind carve-outs:
- Florida: Citizens Property Insurance or private windstorm carriers
- Texas: Texas FAIR Plan
- Louisiana, Mississippi, Alabama, North Carolina, South Carolina: State windstorm pools or private carriers
Cost: $1,500–$5,000+ per year for a $250,000 dwelling limit, depending on coastal proximity and hurricane exposure. Your actual rate depends on your location and individual insurer.
If you’re in one of these states, your homeowners policy may say “wind is excluded; see separate policy.” Do not skip windstorm coverage if you’re required to have it by your lender or if you’re in a high-risk zone.
For state-specific details, see homeowners insurance by state.
What homeowners often miss
Most people assume their homeowners policy is a safety net for any disaster. It’s not. It’s a contract that names specific perils it will cover (fire, theft, vandalism, windstorm, lightning, and a few others) and explicitly excludes the rest. The exclusions are often more important than the coverages, because they reveal where you’re uninsured. A homeowner in Houston who doesn’t buy flood insurance is gambling with their life savings, even if they’ve paid homeowners premiums for 20 years.
The other overlooked detail: optional endorsements (sewer backup, earthquake, scheduled property) add cost, and most insurers don’t push them — they assume if you wanted them, you’d ask. That’s the opposite of how insurance is sold in most categories. For homeowners insurance, the baseline is minimal coverage, and it’s on you to ask for more.
What you should do
If you’re buying or already own a home, don’t assume your policy covers everything. Pull your declarations page and look for the exclusions section. Then ask:
- Am I in a flood zone? Do I need NFIP or private flood?
- Am I in a seismic zone? Should I buy earthquake coverage?
- Do I have a basement or lower-level exposure? Should I add sewer backup?
- Do I own high-value items? Do I need scheduled property coverage?
- Do I run a business from home or rent part of my home? Do I need commercial coverage?
If the answer to any of those is “yes” or “maybe,” call your insurer or agent and get a quote for the endorsements that match your situation. Most cost $50–$300 per year, which is inexpensive compared to an uninsured $20,000 loss.
For a full walkthrough of what is covered in a standard policy, see what is covered by homeowners insurance. For policy types and how they differ, see homeowners insurance types ho3 ho4 ho5.
FAQ
What does homeowners insurance cover?
Standard HO-3 policies cover your dwelling, personal property, liability, and additional living expenses for losses caused by named perils (fire, windstorm, theft, vandalism, lightning, hail). They do not cover flood, earthquake, sewer backup, or gradual damage. Coverage, limits, and exclusions vary by insurer and state. See what is covered by homeowners insurance for full details.
Is water damage covered by homeowners insurance?
It depends. Water damage from a sudden, accidental event (burst pipe, storm leak through the roof) is typically covered. Water damage from gradual leaks, poor maintenance, flood, or sewer backup is not. You need separate endorsements or flood insurance for those. Ask your insurer to clarify water damage coverage in your specific policy.
Do I need flood insurance?
Only if you’re in a FEMA Special Flood Hazard Area (zones A, AE, V) and have a mortgage — then your lender requires it. Outside high-risk zones, it’s optional but recommended if you’re near a floodplain or have had flooding before. Check your flood zone at fema.gov/flood-maps.
Can I add earthquake coverage to my homeowners policy?
In most states, no. Earthquake requires a separate policy or endorsement available only in high-seismic states (California, Oregon, Washington, Alaska, and a few others). Even where available, deductibles are high (10–15% of dwelling coverage) and premiums are steep ($300–$2,500+ per year). Availability and pricing vary by location and insurer.
Does homeowners insurance cover sewer backup?
Not by default. You need an optional sewer backup endorsement, which costs $75–$300 per year and provides $1,000–$5,000 in coverage. Worth it if you have a basement or live in an older neighborhood with aging sewer lines. Ask your insurer whether you qualify for prevention discounts if you’ve installed a backwater valve.
Coverage gaps happen when you assume your homeowners policy covers everything. It doesn’t. Read your exclusions, know your risks, and buy the add-ons that match your home’s exposure. For more on managing coverage costs, see how much homeowners insurance costs.
Not insurance or financial advice. Coverage, exclusions, deductibles, and pricing vary by state, insurer, and individual policy. Review your policy documents or consult a licensed insurance agent for guidance specific to your situation.