Is the square footage calculated by adding up the dimensions for each room?
Answer The square footage of an apartment or a co-op is calculated by measuring the interior dimensions of conditioned (heated and cooled) usable space (so for example you would not count attic spaces or crawl spaces). So if you had three rooms, which were each 10′ x 10′, arranged like boxcars in a train, and separated by walls, your overall square footage would include the area of interior walls separating the rooms. In this case, if the walls were 4.5″ thick (walls tend to be 3.5 inches of wood stud plus an inch or so of drywall or plaster), your overall square footage would be 10′ + 4.5″ + 10′ + 4.5″ + 10′ long times 10′ wide, or 307.5 square feet. Basically this is a complicated way of saying yes, you add up the dimensions of each room, but you also have to account for the area of the interior walls. Hope this helps!
