An owner has a freestanding cabinet that was custom-built to fit an alcove of the living room. When the owner sells the home, the cabinet will be best described as:

Real property refers to land and anything permanently attached to it, such as buildings and structures. While the cabinet is related to the property, it is specifically categorized as a fixture rather than being classified as real property on its own. Real property encompasses a broader category that includes various structures, not just individual items like the cabinet.

Personal property consists of movable items that are not permanently affixed to or associated with the real estate. Since the cabinet has been custom-built and attached to fit the space in the alcove, it no longer retains its status as personal property and is therefore not the correct answer.

An appurtenance refers to a right or privilege that comes with the ownership of land, such as easements or rights of way. Although the cabinet enhances the property, it does not fall under this category as it is a physical item rather than a legal right or privilege associated with the property.