OK - Now I see where you are getting this stuff and it is completely depressing. You have cited a much relied upon resource and in the end I guess that means you might win the battle but it makes little sense to inflict this absence of thought on appraisers throughout all markets. I don't know who wrote that section but after the first paragraph there is a complete breakdown of logic.
The
Appraisal Institute’s Appraisal of Real Estate itself defines highest and best use as “the reasonably probable and legal use of vacant land or an improved property that is legally permissible, physically possible, appropriately supported, financially feasible, and that results in the highest value.”
The use of the term legally permissible is a common thread throughout any definition of HBU you can find.
Notice the use of the word OR when referring to improved property and how suddenly the defining term is "legally permissible" rather than "legal".
Why use the term legally permissible which is an adjective with adverb qualifier rather than just use the lone adjective "legal" or make use of the word legal as the operative adjective with concrete adverb qualifier such as "completely". The operative adjective in the phrase "legally permissible" is permissible which is defined as can be permitted or allowable or can be allowed. Notice the word "can".
OK AI bashers here's your chance - go and dissect the contradictory nonsense in Mike's link after the first paragraph and use their own definition of highest and best use to do it. Too easy. Another complete embarrassment for the industry.
Whether you agree with me or not, the last paragraph in that post uses the same argument Mike uses and goes against what many other posters have written including leelansford (
[url]http://www.idfpr.com/dpr/re/ILLAppr/IllinoisAppraiserMarch2012.pdf[/URL]) who knows a thing or two about the subject, Randolph, myself, and anyone else who has argued that if available one can, if necessary, extract market data for unpermitted additions and perhaps other items in order to determine market value "as is". Sometimes not the best of ideas or paths but to say that lack of a permit always means that opining market value is not possible is ludicrous. If the AI is the final authority on this, and maybe even other topics if this is an example, then we are all in trouble.