Under what condition would a structure containing two dwelling units be classified?

A structure containing two dwelling units is classified as a duplex because a duplex specifically refers to a residential building designed for two separate households. The term “duplex” indicates not only the number of units but also emphasizes its purpose for residential living.

In the context of real estate classifications, understanding that a duplex consists of two units is essential. This classification is distinct from various commercial, industrial, or financial designations. While the other options refer to different types of properties that do not inherently imply residential use, a duplex is explicitly designed and classified for habitation by two separate families or individuals.