"It seems to me that to determine highest and best use, one would need to perform both a commercial and a residential appraisal."
Bingo! You would have to perform both to determine the most probable price. If you are operating under a value definition that assumes a prudent, knowledgeable seller, then that seller will be smart enough to turn down any lower offers from buyers who do not understand the property's HBU.
Bingo! You would have to perform both to determine the most probable price. If you are operating under a value definition that assumes a prudent, knowledgeable seller, then that seller will be smart enough to turn down any lower offers from buyers who do not understand the property's HBU.