When using MLS data and I see that the GLA matches the tax records then I know they are not accurate or are highly suspect at best. So when doing the GLA adjustments I do not adjust for 50 or 100 square feet differences depending on size. When I see MLS GLA that does not match the tax records then I know some “professional” has measured. Either the RE agent measured or used the GLA from a prior appraisal. Since appraisers are supposed to use ANSI or the NC RE Commision “Yellow book” which is almost a duplicate of ANSI standards, and RE agents are supposed to follow the “Yellow book”, I have greater confidence in the reported GLA and may still not adjust for minor differences, or go to 25 or 50 sf differences without adjustment since the data Is considered more reliable. The idea of “false accuracy” is a crock, unless all reported GLA matches the Tax records. Here it is exponentially more likely not to match than it is to match. Perhaps it’s because there are standards and/or the number of RE agents that were sued and lost for misreporting GLA.