It's kind of like a swimming pool in this area. It doesn't contribute anything close to what it costs to install but it does result in a higher sales price to the right buyer. A marketing "mistake", but a common one. And a good example of "value in use". The original owner presumably got enough enjoyment out of the pool to make up for the monetary loss he experienced with the sale of his over improvement.
I see them every now and again and have to sort through them. But I think the approach to value in use is bogus. There is no sound basis for allocating the value of the pieces from the price of the sale as a whole. And your suggestion that the original owner's motivation points to
that owner's motivation, not any measure of any value of any part of any property. Its like "valuing" an easement.
I have worked in markets where similar tracts of land, with similar market values, were encumbered with easements that differed by factors of 5 or 10. What is the value of an easement in that market?
There was a short time during which I appraised the real estate included in nearly every bar transaction in a small resort-type community. In almost every case, someone wanted to argue about "their" allocation among the real estate, FF&E, and liquor license of their, and others', transactions. Their opinions on those matters were irrelevant to me, and if you quiz them long enough, they will slip and concede those allocations are based on either the buyer's or the seller's tax advantage or disadvantage. Again, nothing to do with the market.
I just ran across the situation you describe. I had analyzed it 10 years earlier when it sold as a package with the swimming pool on the second site. They gave away the second site trying to "save" the value of the pool. It sold again recently the same way, for $750,000. I found it when trying to understand a $1.8 million sale. The newly constructed home is where the swimming pool was. They had tried to market the extra lot by itself for between $299,000 and $449,000 for six months without success, and build the spec home. Shortly after the new home sold, the old one, sans swimming pool and extra lot, resold for $715,000. What is the value in use of the site from those facts? Or its market value from those facts?