An HO3 policy is the standard homeowners insurance form in the United States and the one most mortgage lenders require. It covers your home’s structure against every cause of damage except those the policy specifically excludes, and it covers your personal belongings against a defined list of about 16 named events. Layered on top are coverage for detached structures, additional living expenses if your home becomes uninhabitable, personal liability, and small no-fault medical payments for injured guests. That combination is why the HO3 is the default policy for single-family homeowners.
The split between “open perils” for the building and “named perils” for your belongings is what distinguishes an HO3 from its neighbors on the shelf. The most common upgrade is the HO5, which extends open-perils coverage to your personal property as well. Everything else (HO-1, HO-2, HO-4 for renters, HO-6 for condo owners, HO-8 for older homes) serves a narrower situation. If your agent or lender points you toward an HO3, they’re pointing you toward the industry baseline.
The Six Coverages Inside an HO3
Coverage A: The Dwelling
Coverage A protects your home’s physical structure: foundation, walls, roof, built-in cabinets and countertops, and permanently installed plumbing and electrical systems. Because it’s open perils, the insurer has to pay for any sudden and accidental damage unless they can point to a specific exclusion in the policy. Fire, wind, hail, vandalism, falling objects, a car through the living room wall — all covered.
Your Coverage A limit should reflect what it would cost to rebuild your home from the ground up, not the market value and not what you paid. You’ll also choose between replacement cost, which pays to rebuild without subtracting for wear and tear, and actual cash value, which deducts depreciation. Replacement cost costs more and pays much better after a serious loss. On a 15-year-old roof, actual cash value can cut your payout in half.
Most HO3 policies include a coinsurance clause that requires you to insure your home for at least 80 percent of its full replacement cost. Fall below that threshold and the insurer reduces your claim payout proportionally, even on damage well within your coverage limit. If your home costs $400,000 to rebuild but you carry only $240,000 in coverage, you’ve met 75 percent of the required 80 percent minimum, and a $40,000 claim would pay roughly $30,000 minus your deductible. The gap comes out of your pocket. Rising construction costs push homeowners across this line quietly; verify your dwelling limit against current rebuilding estimates every year or two.
Coverage B: Other Structures
Coverage B pays to repair or rebuild detached structures on your property, such as a detached garage, tool shed, fence, deck, or gazebo. The standard limit is 10 percent of your dwelling coverage, so a $350,000 home comes with $35,000 for other structures.1Progressive. What Is Other Structures Coverage? You can raise the limit for an additional premium if you have valuable outbuildings, a pool house, or a detached guest suite. The same open-perils framework and the same exclusions apply, so a flood or an earthquake that destroys your detached garage is no more covered than the same event hitting the house.
Coverage C: Personal Property
Coverage C protects your belongings: furniture, electronics, clothing, appliances, and the rest of what you own. Under an HO3 this coverage is named perils only. The policy lists the specific events that trigger a payout: fire and lightning, windstorm and hail, explosion, riot, damage from aircraft or vehicles, smoke, vandalism, theft, volcanic eruption, falling objects, weight of ice or snow, sudden water discharge from plumbing or appliances, sudden electrical damage, and freezing of household systems. Damage from something outside that list, including accidental spills, mysterious disappearance, and pet damage, is not covered.
Your Coverage C limit is usually set at 50 to 75 percent of your dwelling coverage.2Insurance Information Institute. How Much Homeowners Insurance Do I Need On a $300,000 dwelling policy that’s $150,000 to $225,000 for belongings. The number sounds generous until you notice the sub-limits inside it. Jewelry theft is commonly capped around $1,500.3Insurance Information Institute. Special Coverage for Jewelry and Other Valuables Firearms, silverware, and collectibles carry similar internal caps. If you own something that would sting to lose, a scheduled personal property endorsement (sometimes called a floater) insures individual items at their appraised value.
Coverage C also follows you off the property, usually up to about 10 percent of your total personal property limit. A laptop stolen from a hotel room or belongings damaged in a college dorm can be claimed. And here too, you’ll choose between replacement cost and actual cash value. Replacement cost is worth the upcharge: a five-year-old couch that cost $2,000 new might depreciate to $600, but replacing it still costs $2,000.
Coverage D: Loss of Use
If a covered event makes your home uninhabitable while it’s being repaired, Coverage D pays your additional living expenses. Hotel stays, restaurant meals, laundry services, and extra commuting costs all qualify. The limit is typically 20 to 30 percent of your dwelling coverage, so a $300,000 policy carries $60,000 to $90,000 for temporary housing and related costs.4Travelers Insurance. Loss of Use Homeowners Insurance
The word “additional” matters. The policy reimburses only what you spend above your normal baseline. If your grocery bill runs $500 a month and jumps to $800 while displaced, only the extra $300 is covered. Many policies also impose a time cap, often 12 or 24 months. If repairs run longer than that, the remaining living expenses are yours.
Coverage E: Personal Liability
Coverage E responds when someone is injured on your property or you accidentally damage someone else’s property. It pays for legal defense, medical bills, and any settlement or judgment against you. The standard starting limit is $100,000, which is dangerously low. A single serious injury lawsuit can blow past that easily. $300,000 to $500,000 is a more realistic floor, and homeowners with meaningful assets should consider an umbrella policy that stacks $1 million or more of liability protection on top.
Liability follows you beyond your property lines. If your dog bites someone at a park or your child damages a neighbor’s property, Coverage E responds. There’s a catch: some insurers restrict or exclude coverage for certain dog breeds they classify as high risk, including pit bulls, Rottweilers, and Dobermans. If your insurer has a breed restriction and your dog injures someone, the claim can be denied. Not all insurers take this position, so if you own a breed that sometimes lands on exclusion lists, confirm your policy’s stance in writing before you need to.
Coverage F: Medical Payments to Others
Coverage F is a small, no-fault benefit that pays a guest’s medical bills after a minor injury on your property, no matter who was at fault. A neighbor trips on your porch and needs stitches; Coverage F handles it without a liability claim. Limits typically run $1,000 to $5,000 per person.5Progressive. What Is Homeowners Medical Payments Coverage? It’s a useful tool for defusing small incidents before they turn into lawsuits. Coverage F does not apply to you or members of your household.
What an HO3 Doesn’t Cover
Open perils on the dwelling sounds airtight, but the exclusion list is where most claim surprises happen.
Flood
No standard homeowners policy covers flood damage. Not river flooding, not storm surge, not heavy rain pooling in your basement. Flood coverage requires a separate policy, either through the National Flood Insurance Program or a private insurer.6Federal Emergency Management Agency. Flood Insurance If your home sits in a Special Flood Hazard Area and you have a government-backed mortgage, flood insurance is mandatory.7National Flood Insurance Program. Who’s Eligible for NFIP Flood Insurance? NFIP policies cap residential building coverage at $250,000 and contents at $100,000.8Federal Emergency Management Agency. NFIP Flood Insurance Manual Homeowners who need higher limits can shop private flood insurers.
Earthquake and Earth Movement
Earthquakes, landslides, sinkholes, and mudflows are excluded. Homeowners in seismic zones need a separate earthquake policy or an endorsement added to their HO3. Earthquake deductibles are usually percentage-based (often 5 to 25 percent of dwelling coverage), so significant out-of-pocket exposure remains even with coverage in place.
Water Damage
Water is the most confusing category because the HO3 covers some water events and excludes others. A pipe that suddenly bursts and soaks your floors is covered. A dishwasher that ruptures is covered. But a pipe that leaked slowly for months while you left it alone becomes a maintenance issue, and the resulting damage is excluded. Even on the covered burst, the insurer typically pays for the ruined flooring but not the pipe itself. Frozen pipes are covered only if you took reasonable steps to keep the building heated.
Sewer and drain backups are excluded outright under a standard HO3. If sewage backs up through your drains and floods your basement, you need a water backup endorsement for the policy to respond. It’s one of the cheapest endorsements available and one of the most frequently missing.
Maintenance, Neglect, and Wear
Insurance covers sudden and accidental damage, not the slow consequences of ignoring your house. Mold from a long-running leak, termite damage, rot from bad drainage, deteriorating shingles — none of it is covered. The line between “sudden” and “gradual” is where many denials happen, and insurers are practiced at drawing it in their favor.
War, Nuclear Hazard, and Intentional Acts
Damage from war, nuclear hazards, and government seizure sits outside HO3 coverage. Deliberate damage to your own property is excluded, and fraudulent claims can trigger denial, cancellation, and criminal prosecution.
Deductibles
Your deductible is the amount you pay out of pocket before the insurer covers the rest of a claim. Standard HO3 deductibles usually run $500 to $2,500, and some insurers offer $5,000 or higher.9Insurance Information Institute. Understanding Your Insurance Deductibles A higher deductible lowers your premium and raises your exposure on every claim. If you rarely file, a $2,500 deductible can pay off. If cash on hand is tight, $1,000 buys more peace of mind.
Coastal and storm-prone areas usually carry a separate percentage-based deductible for wind or hail. These often run 1 to 5 percent of the home’s insured value rather than a flat dollar amount. On a $400,000 home with a 2 percent wind deductible, the first $8,000 of any wind claim is yours. Homeowners used to $1,000 flat deductibles get blindsided by this, so check the declarations page.
Endorsements Worth Adding
A base HO3 is solid but not complete. A handful of endorsements fill common gaps at modest cost.
- Water backup coverage pays for damage from sewer and drain backups, which the base policy excludes. Given how ordinary basement backups are, it belongs near the top of the list.
- Ordinance or law coverage pays the extra cost of rebuilding to current building codes rather than the ones in force when the home was originally built, typically at a limit of 10 to 25 percent of dwelling coverage.10Progressive. What Is Ordinance or Law Coverage?
- Scheduled personal property (a floater) insures jewelry, fine art, and instruments at their full appraised value, bypassing the sub-limits that would otherwise apply.3Insurance Information Institute. Special Coverage for Jewelry and Other Valuables
- Service line coverage pays to repair or replace underground utility lines running from the street to your house, including water, sewer, gas, and electrical. Limits are often around $10,000 per occurrence, and excavation and landscaping repair are typically included.11Progressive. What Is Service Line Coverage?
- Replacement cost on personal property upgrades your belongings coverage from actual cash value to replacement cost, eliminating the depreciation deduction on older items.
Not every endorsement makes sense for every home. No basement, probably no water backup. No detached structures, no reason to raise Coverage B. Match endorsements to your actual risks.
Filing a Claim
After a covered loss, getting paid takes more than a phone call. A few steps quietly separate homeowners who get made whole from those who don’t.
Photograph and video everything before you clean up or begin permanent repairs. Detailed documentation is the single most effective thing you can do to protect the claim. Keep receipts for any emergency work you do to prevent further damage, such as tarping a damaged roof, because those costs are usually reimbursable.
Most policies require a formal proof of loss statement, a sworn document detailing the cause and date of the damage, the items lost or damaged, and the dollar amount claimed. The deadline is spelled out in the policy and is often around 60 days after the incident. Missing it can kill the claim. Where you don’t have receipts for damaged belongings, photographs, credit card statements, or a written description with the approximate purchase date can serve as backup.
The insurer sends an adjuster to inspect and estimate the payout. The adjuster works for the insurance company, and their estimate may not match what contractors quote you. If you disagree, you can hire a public adjuster to provide an independent estimate. Public adjusters charge a percentage of the settlement and are usually worth the cost only on larger claims. If the dispute holds, most HO3 policies contain an appraisal clause: you and the insurer each hire an appraiser, and a neutral umpire breaks a tie. Appraisal settles the dollar amount of a loss without going to court, but it doesn’t settle whether the loss is covered in the first place.
One more surprise: even with replacement cost coverage, insurers typically pay the actual cash value first and hold back the depreciation. You collect the remaining amount after you finish repairs and submit receipts showing what you actually spent. Skip the repairs and you keep only the depreciated amount. Homeowners expecting one lump sum large enough to start rebuilding often learn about the holdback the hard way.
Most states give insurers a set window to acknowledge a claim, often 10 to 15 days, and to make a coverage decision within 30 to 60 days. Investigations involving suspected fraud or complex damage can run longer.
Lender Requirements, Renewal, and Nonrenewal
If you have a mortgage, your lender requires you to carry homeowners insurance for the life of the loan, usually at a limit at least equal to the outstanding balance or the home’s replacement cost, whichever is less. The lender is listed as an additional interest and gets notified if coverage lapses. Premiums are typically collected through an escrow account folded into your monthly payment.
If your coverage lapses, the lender can buy force-placed insurance on your behalf and charge you for it.12Consumer Financial Protection Bureau. 1024.37 Force-Placed Insurance Force-placed policies cost significantly more than standard homeowners coverage and typically protect only the lender’s interest, not your belongings. Your servicer must give you at least 45 days’ written notice before adding force-placed insurance, and charges can be applied retroactively to the first day you lacked coverage, so even a short lapse gets expensive.
HO3 policies renew annually. At each renewal the insurer reviews your claims history, the home’s condition, regional loss trends, and in many states your credit-based insurance score. Premium increases are common. Bundling home and auto, installing smoke detectors and security systems, or raising your deductible can offset some of the pressure. When the number jumps hard, shop equivalent coverage before accepting the renewal; a cheaper policy with a stripped endorsement package or higher deductible isn’t the same policy at a lower price.
An insurer can cancel a policy mid-term only for limited reasons: nonpayment, material misrepresentation on the application, or a substantial increase in risk. Regulations require advance notice, typically 10 to 30 days. Nonrenewal is different: the insurer decides not to extend at the end of the current term, often after multiple claims or a shift in underwriting appetite for your area. Insurers must generally give at least 30 to 60 days’ notice, though some states require significantly more.13National Association of Insurance Commissioners. Property Insurance Declination, Termination and Disclosure Model Act
Start shopping the moment a nonrenewal notice arrives. A gap creates two problems at once: your lender force-places an expensive policy, and future insurers price the lapse into your next premium. If you believe the nonrenewal is unjustified, you can file a complaint with your state’s department of insurance.