I have been looking for the guideline that establishes acceptable percentage of a comp's GLA to that of the subject property. As a rule I have only been using comps ( if possible) 85% or greater of the GLA of the subject property. Sometimes this is unavoidable. I have been looking through the guidelines and have not been able to find in writting the Fannie Mae acceptable percentage guideline that states the acceptable square footage differences. Can someone point me in the right direction? Thanks.