https://answers.HUD.gov/FHA/s/artic...GLA-areas-of-subject-properties-on-appraisals
Question
Does FHA require its Appraisers to follow the American National Standards Institute (ANSI®) Z765 Square Footage-Method for measuring, calculating, and reporting gross living area (GLA) and non-GLA areas of subject properties on appraisals?
Answer
FHA does not require appraisers to use the ANSI Z765 Square Footage Method Standards for measuring, calculating, and reporting the Gross Living Area (GLA) for the subject property.
Calculating the improvements' square footage (GLA and non-GLA areas) of the subject property and all comparables should be done consistently to avoid confusion or misleading appraisals.
GLA refers to the total area of finished, above-grade residential space calculated by measuring the outside perimeter of the Structure. It includes only finished, habitable, above-grade living space.
The Appraiser is required in the appraisal analysis and reporting to:
- identify noncontiguous living area and analyze its effect on functional utility;
- ensure that finished basements and unfinished attic areas are not included in the total GLA; and
- use the same measurement techniques for the subject and comparable sales and report the building dimensions in a consistent manner.
When any part of a finished level is below grade, the Appraiser must report all of that level as below-grade finished area, and report that space on a different line in the appraisal report, unless the market considers it to be Partially Below-Grade Habitable Space.
In the case of non-standard Properties and floor plans, the Appraiser must observe, analyze, and report the market expectations and reactions to the unique Property.
The Appraiser may apply a supplemental measurement standard if it does not conflict with these requirements and the Appraiser discloses the use of the standard.
The following guidance regarding reporting the GLA on the Sketch Addendum, which is required with all appraisals:
- The Appraiser must include a building sketch showing the GLA, all exterior dimensions of the house, patios, porches, decks, garages, breezeways, and any other attachments or outbuildings contributing value.
- The Appraiser must show the calculations used to arrive at the estimated GLA. The Appraiser must provide an interior sketch or floor plan for Properties exhibiting functional obsolescence attributable to the floor plan design.
For policy information, see Handbook 4000.1 II.D.3.c and II.D.4.a at https://www.HUD.gov/HUD-partners/single-family-handbook-4000-1