It’s common in real estate to deal in terms of square feet. It seems like an easily comparable number, or an apples-to-apples comparison. Price per square foot becomes the metric of value. This industry standard doesn’t account for true value, though. After all, this number is all-inclusive – garages, attics, closets, nooks and crannies, hallways – of space that, while you pay for it, isn’t an important, usable, necessary part of your home.