A method and apparatus for insuring both the owner and tenants within an apartment or multi-unit dwelling comprising: inputting into a computer processor a database of building physical information, occupancy information, and tenant rental information; inputting into the computer processor an insurance qualification program for tenant insurance covering both the building owner and tenant from unintentional damage caused by the tenant from fire, smoke, explosions, water damage, or negligence injuries by the tenant caused to third parties pursuant to predetermined insurability criteria; qualifying the building for tenant and owner occupancy insurance, and computer translating and generating insurance coverage for the building owner based on the number of units in the building and insurance coverage limits desired, and billing the owner for renter's single interest insurance.