A breakdown of what is and isn't included with your insurance coverage. iStockphoto By the editors of Kiplinger's Personal Finance Updated for 2017 Your homeowners policy will pay to fix damaged property or rebuild all or part of your home after a covered loss. It also may entitle you to things such as reimbursement for additional living expenses or loss of rental income when you or someone renting part of your house has to move temporarily because of damage to the living quarters.QUIZ: Does Insurance Cover That? The coverage on losses other than the house itself are generally figured as a percentage of the coverage on the house. For instance, with most basic policies, your personal property is automatically insured for 50% to 70% of the house amount. (More coverage is available on many policies -- see the discussion of replacement cost for household contents.) That 50% to 70% is in addition to the insurance on the structure, not part of it. How Policies Differ There are homeowners policies for houses, for condo and co-op apartments, even for renters. The major forms of house policies, called HO-2 and HO-3, offer similar protection on most points. The crucial differences lie in the number of perils against which your home and property are insured. Covered perils. A homeowners policy will normally compensate you for losses to the building and personal property only if the damage is caused by a peril named in the policy. This isn't a major worry because the named perils are pretty comprehensive. Homeowners policies don't cover damage from floods or earthquakes, and generally don't cover sewer or drain back-ups, for instance. You have to buy that coverage separately. Advertisement Not all the policies that insure against a particular peril necessarily provide the same degree of protection, so ask the agent to walk you through the coverage. When you're looking for a policy to cover items such as pictures, antiques, furs and musical instruments, you might do better by buying additional insurance in the form of riders than by purchasing a homeowners policy with more blanket coverage. Insurance payback and the 80% rule. Insurance companies compute payments for homeowners policy losses in two ways. Replacement cost covers what it would cost to rebuild your home if it were destroyed or to replace items in it. Actual cash value takes depreciation into account and pays only the current market value of the loss. Thus, your three-year-old sofa that cost $2,000 new might be worth only $800 in a cash-value policy. A replacement-cost policy would reimburse you for the cost of a comparable new sofa. Because homes are rarely destroyed, it's possible to save a little on your premiums by insuring the place for less than it would cost to rebuild the whole thing. As long as the face amount of your policy equals at least 80% of the insurance company's estimated cost to rebuild (excluding land, which isn't covered), you are fully covered for complete or partial losses -- up to the policy's limits. If you have a $160,000 policy on a home the company estimates will cost $200,000 to rebuild and you suffer $20,000 in damage from a kitchen fire, you will be reimbursed for the full $20,000, minus your deductible. If the house burns to the ground and it costs $200,000 to rebuild, your coverage will stop at $160,000. But insuring for less than full replacement value can be a false economy because of the way insurance companies compensate for partial losses. Say you buy coverage for 80% of the home's value but as prices for labor and building materials rise, that same amount would cover only 70% of the cost of rebuilding. Even if you insured your home for 100% replacement value a few years ago, you may need to brush the cobwebs off your policy. A policy feature called inflation guard protects you by automatically raising your policy limits in step with rising prices. Insurance agents have access to cost-index figures you can use to help update the replacement value. When you compute the required amount of insurance, remember to eliminate the estimated value of the land, excavations, foundation, underground pipes and similar building components not likely to be damaged. Advertisement Extended replacement cost coverage. In the past, many insurers guaranteed that they would pay whatever it cost to rebuild your home in the event of a total loss. Now you'll probably need to buy extended replacement-cost coverage, which usually pays an extra 20% to 30% above your policy's limits. That's especially useful after a disaster, when labor and material costs often rise, pushing the cost to rebuild higher than your policy limit. A building code endorsement. If your home suffers major damage, the cost to rebuild may rise if you must meet updated building codes. You could come up short even with guaranteed- or extended-replacement coverage. Many insurers offer an "ordinance or law" endorsement that pays a certain amount toward that additional cost. SEE ALSO: 10 States Most at Risk of Disaster Coverage of expensive belongings. Most homeowners policies cover jewelry, art and collections, but they may cover only their depreciated value and will probably impose a dollar limit, such as a total of $2,000 to $3,000 total for jewelry. To fully cover those items, you'll need to pay for special coverage (a rider, floater or endorsement).