Richard is correct, but with regard to the property characteristics around which this subject pertains, HABU in the condition "as is" regards the nature of the additional acreage. HABU analysis will reveal if the acreage is surplus or excess.
If surplus, the law of decreasing returns would normally dictate that each acre greater than that which is typical for the neighborhood or necessary to support the primary improvements will have less value than the acre preceding it. This is logical as the additional acreage has increasing limited utility but increasing overall holding expense.
On the other hand, if excess, the additional acreage could have greater utility as it could be capable of supporting additional development. For example, if minimum lot sizes were 5 acres and the land was capable of supporting development, in the case of the subject property it is possible that the property could be subdivided and put to a more intensive use. With greater utility, the land has greater value per acre than if there was no subdivision potential.
In the case of the subject, it is reported that there are no other parcels of similar size in the area. Why not? That question has not been answered. Is it legally possible to subdivide? Perhaps. Would the land support additional development? Perhaps. Are there any factors significantly affecting the cost of development? Don't know. What is the most productive use and what is the timing of that use? Don't know.
As was initially set forth by some of us at the beginning of this thread, there are simply too many unknowns about the property to make blanket statements about regarding potential contributory value of each acre greater than that needed to support the primary improvements. Metamorphic, to my knowledge, was the only contributor to this thread that actually presented a reasonable and logical method to value the additional acreage.
The proposition that land in excess of that needed to support the primary improvements has no value is preposterous and laughable. Would it have less value than the minimal site area necessary for the improvements? One would certainly think. But how much less is an unknown that no one here can ascertain based upon the information provided. Those that would throw out blanket assumptions and generalities, even if proven in their specific market segment, are doing a disservice to the receiver of that information. Especially when that information is grossly nonfactual.