History of home insurance
The first homeowner's policy per se in the United States was introduced in September 1950, but similar policies had already existed in Great Britain and certain areas of the United States. In the late 1940s, US insurance law was reformed and during this process multiple line statutes were written, allowing homeowner's 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 it issued simplified homeowner's policy forms for reselling to insurance companies. These policies have been amended over the years. (Source Wikipedia)