In the United States, most home buyers borrow money in the form of a mortgage loan, and the mortgage lender always requires that the buyer purchase homeowners insurance as a condition of the loan, in order to protect the bank if the home were to be destroyed. Anyone with an insurable interest in the property should be listed on the policy. In some cases the mortgagee will waive the need for the mortgagor to carry homeowner's insurance if the value of the land exceeds the amount of the mortgage balance. In a case like this even the total destruction of any buildings would not affect the ability of the lender to be able to foreclose and recover the full amount of the loan.
Home insurance in the United States may differ from other countries; for example, in Britain, subsidence and subsequent foundation failure is usually covered under an insurance policy. Reportedly, United States insurance companies used to offer foundation insurance, which was reduced to coverage for damage due to leaks, and finally eliminated altogether.
The first homeowners policy per se in the United States was introduced in September 1950, but similar policies had existed in Great Britain and certain areas of the United States. In the late forties US insurance law was reformed and during this process multiple line statutes were written, allowing homeowners policies to become legal.
Prior to the 1950s, there were separate policies for the various perils that could affect a home. A homeowner would have had to purchase separate policies covering fire losses, theft, personal property, and the like. During the 1950s, policy forms were developed allowing the homeowner to purchase all the insurance they needed on one complete policy. However, these policies varied by insurance company, and were difficult to comprehend.
The need for standardization grew so great that a private company based in Jersey City, New Jersey, Insurance Services Office, also known as the ISO, was formed in 1971 to provide risk information and issued a simplified homeowners policy for resell to insurance companies. These policies have been amended over the years.