How is a homes square footage calculated?
The official measure of a home’s square footage, for the purposes of Large House Review, is called total living area plus garage (TLAG). TLAG is different from a home’s assessed square footage or the square footage a realtor might report on a property listing. According to LHR rules and regulations, TLAG includes “the sum of the horizontal area(s) of the above-grade floors … in the residential building(s) on a lot, measured from the exterior faces of the exterior walls.” It also encompasses “area(s) of attic(s) measured from the floor to the interior roofline, if seven feet or greater in height and five feet or greater in height on a sloped interior roofline; garage and storage space, whether in principal or accessory structures, in excess of 600 square feet; and basement areas multiplied by a fraction, the numerator of which is the external, above-ground surface of basement walls and the denominator of which is the total surface (both above and below ground) of external basement wal
