If you own a multi family (2-4 family) property and live in one of the units, then you can usually use the tried, true, and tested HO-3 homeowners policy to cover the entire building, your contents (your stuff), and your own personal liability exposure.
However, if the owner does not live at the property, a homeowners policy won't work; use a "Dwelling Fire Policy" to protect your interests properly. The most popular dwelling fire policy is the DP-3.
If the owner insures a rental property with an HO-3, but lives elsewhere, it's a bad fit; you risk NOT being covered for losses.
Buildings with 3 and more families are most often insured through a commercial policy rather than either the DP-3 or HO-3 (though some insurance companies will insure up to a 4-family building using a DP-3). The most common approach with these larger buildings is a package which includes automatically both property coverage (for the building), lost rents, and liability protection in case you are sued.