What term is used to describe the heated and cooled habitable contiguous area of a house?

The term that describes the heated and cooled habitable contiguous area of a house is "Living Area." This term specifically refers to the spaces within a home that are designed for daily living, which include areas that are climate-controlled for comfort throughout the year. Living Area encompasses spaces like bedrooms, living rooms, dining areas, and any other rooms that are part of the house's functional layout and are suitable for occupancy.

In residential real estate, accurately defining the Living Area is important for determining property value and assessing usable space. This is usually calculated based on the square footage of a home, excluding areas that are not heated or cooled, such as garages or unfinished basements, which may be classified differently.

The other terms, while related, do not precisely capture the concept of heated and cooled habitability. "Finished Area" can refer to areas that are completed but doesn’t emphasize climate control. "Usable Space" might include any space that could be utilized but is not specific to living conditions. "Interior Area" is too vague and could refer to any interior space without the focus on living conditions. Thus, "Living Area" is the most accurate term in this context.