Plywood or particle/OSB board used for exterior sheathing is in 4 FOOT dimensions (48 inches) in most cases, sometimes 5 feet wide, and by either 8 or 9 FEET long. However, for reporting purposes, Fannie Mae expects the GLA figure to mean above grade Finished Area, and basement to mean Finished and Unfinished Area below grade.įor those who may not know, most homes in the US are designed using common lumber dimensions (measured to the INCH) to avoid as much wood waste as possible. ANSI uses ‘Finished Area’ to reference both above and below grade areas suitable as year-round living space, and ‘Unfinished Area’ for the space not meeting the criteria of Finished Area. When one really stops to analyze what ANSI is saying, realization is that measuring to the ‘finished exterior wall’ actually can or may have the result of ADDING square footage to the dwelling! When you also know that the ANSI Measurement Standard initially came from requests from the home building industry beginning in 1994 to establish a Standard, you can see why they might want that to be the result!ĪNSI does not use the term “GLA” which is on all our forms.
Cantilevers extending past the foundation or lower floor are measured to the exterior stud face for the wall, not including sheathing or siding.īut when the appraiser physically measures an existing home on-site, the ANSI Standard says to measure “at Floor Level to the exterior finished surface of the outside walls.” (3.2 & 3.3) Does the ‘exterior finished surface’ include brick or stone veneer that extends beyond the actual framed finished wall surface? Does the ‘exterior finished surface’ include the corner trim that most homes have? ANSI doesn’t address these items directly. (3.1) This is the same dimension locations the local assessor uses when they input new construction homes into their taxing data base from submitted plans – because in most cases they do not physically measure new construction homes in the field – they use plans submitted for the permitting process. Here’s why: for new construction, when the plans (blueprints) are provided to the appraiser to report ‘GLA’ etc., those dimensions on the plan are measured from the EDGE OF THE FOUNDATION as shown on the plans, not the sheathing or siding on the home.
Uniformity is the stated goal.ĪNSI is not consistent in how they want the perimeter of homes to be measured. There’s been lots of discussion on various forums, classes, Facebook, blogs, podcasts, surveys, articles, etc., about the upcoming ‘demands’ by ONE of the GSE’s to measure using ANSI Standard Z765-2021, and by both GSE’s to provide a Floor Plan for certain assignments. “…if you the appraiser are not required to inspect the property yourself, don’t you want to have a more detailed diagram of the home, i.e., a Floor Plan?”
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