I think a lot of it varies from city to city. I’ve encountered code like 3/2/2 in some ads, meaning three bedrooms, two full baths and two half baths.
Regional variations in real estate terminology isn’t unheard of. In Cleveland, for instance, a “bungalow” means a 1950s-era suburban one-and-a-half story house, usually with the second floor attic converted to useful living space. In many other cities, it’s a Craftsman or Arts-and-Crafts-inspired single family hosue built in the 1920s. In Denver, studio apartments are called “buffets.”
Houses in Buffalo have “Florida rooms,” but in Florida they’re called “lanais”. Cleveland has “three season rooms,” which is a fully enclosed addition that usually has no heating.
I’m still wondering if there’s an official term for the “Polish porch” or “Polish family room” - a phenomenon common in Buffalo’s eastern suburbs, but rare elsewhere in the region – where garages have two doors; a normal solid door and a screen door. During the summer, the garage screen door is kept lowered, and the garage is converted into a living area.