Home insurance, or even homeowners insurance, is an insurance policy that combines insurance on the home, its contents, loss of the use of the home (additional living expenses) and, typically, the more individual possessions of the homeowner, as well as liability insurance for accidents that can transpire at the home.
The cost of homeowners insurance scales upward depending on what it would cost to replenish the home, and which extra "riders", meaning extra items to be insured, are bound to the policy. The insurance policy itself is a long contract, and list what will and what will not be paid in the case of various cases.
Virtually all insurers charge less if it appears less likely the home will be damaged or even destroyed: as an example, if the home is situated next to a fire station, or even if the home is equipped with fire sprinklers and fire alarms.
Often, claims aren't paid because of earthquakes, floods, "Acts of God", or even war (whose definition occasionally includes a nuclear explosion from any source). Some kind of special insurance can be purchased for these possibilities.