What is the primary document that establishes real property ownership in Utah?

The primary document that establishes real property ownership in Utah is the deed. A deed is a legal instrument that conveys title from one party to another and serves as the official evidence of ownership. It contains essential details such as the names of the parties involved, a description of the property, and the intention to convey ownership.

While a warranty deed is a specific type of deed that offers certain guarantees about the property's title, it is still a form of deed and not the primary document itself. Title insurance, on the other hand, protects the buyer against potential defects in the title but does not establish ownership. A lease agreement pertains to the rental of property and does not confer ownership rights, as it merely allows one party to use another's property under specific terms.

In summary, the deed is the crucial document for evidencing ownership of real property, making it the correct answer in this context.