What is defined as a structure designed or used as a residence in subdivisions?

A structure designed or used as a residence within subdivisions is best defined as a dwelling. The term "dwelling" encompasses various residential building types and refers to spaces where people live. It is a broader category that can include houses, apartments, condominiums, and similar structures, making it a comprehensive term relevant to subdivision development.

While rowhouses, duplexes, and condominiums are specific types of dwellings, the term "dwelling" includes all these variations, along with others. This makes it the most appropriate answer to describe any residential structure situated in a subdivision. Each of the other choices pertains to specific formats of residential buildings but does not encapsulate the full scope of what a dwelling is in the context of subdivisions.