CA Prob Code Section 5610

“Real property” means any of the following:

(a)

Real property improved with not less than one nor more than four residential dwelling units.

(b)

A condominium unit, including the limited common elements allocated to the exclusive use thereof that form an integral part of the condominium unit.

(c)

A single tract of agricultural real estate consisting of 40 acres or less that is improved with a single-family residence.