Clarifies the definition of floor area

This bill clarifies how "floor area" is measured for residential buildings under housing regulations. It specifies that spaces with higher ceilings (e.g., 12-24 feet tall count twice) are included multiple times in floor area calculations, while excluding cellars, low attics, outdoor balconies, parking spaces, and mechanical equipment areas (except where noted). It directly affects housing developers, building inspectors, and property owners who must comply with these measurement rules for zoning and construction. The changes apply to all residential buildings covered by the Multiple Dwelling Law, ensuring consistent application of floor area definitions.