When measuring the square footage of a home according to national standards, which area should definitely be included?

When measuring the square footage of a home according to national standards, the master suite is definitely included because it is considered a habitable space. Habitable spaces are areas that are suitable for living, sleeping, eating, or cooking and are designed for such use. The master suite, typically featuring a bedroom and possibly an adjoining bathroom, is a key component of a home's livable area and contributes significantly to the property's overall value.

In contrast, an unfinished attic with six-foot ceilings may not be included in the square footage because it generally does not meet the criteria for habitable space. To be counted in the square footage, an attic must typically be finished and have adequate ceiling height for its intended use. Similarly, an attached garage is typically not counted as part of the living area, even though it is physically connected to the home. Detached structures like a pool house are also excluded since they are not part of the primary living area of the home. Therefore, only a master suite meets the national standards for inclusion in the overall square footage of a home.