MV is what does it sell for, not what it costs or what the loss is.
If a house is half finished or 1/4 finished all you need is a rough idea , you don't have to be accurate to the dollar what it costs to complete ( every estimate is different btw in real life from contractors)
A partly finished house appeals typically to investors and property flippers, and whether it is a part-finished new house or an old house needing upgrades and repair the project is similar in their eyes, buy it low, put in the least $ they can to flip it and sell it for a higher price of X $. Some flippers do a really good job and just a cosmetic fix. A person buying an unfinished home takes on more of a project wrt expertise and permits than just repairing an existing home. But again, it is not their cost that is the issue, though we should have a rough idea of it, it is what a part-finished home would sell for considering the cost to cure and time to hold it etc
Your overly legal for no reason warning to RE agents scared every one of them off. It wa overkill. Asking for their opinion in a survey did not expose them to liability esp since you do not have to disclose their names in the appraisal.
My premise was
--first to determine the market value of the SFR as if the project was completed (with a caveat that the project included more than 3000 sf of new living area to total 7300 sf, as well as the comprehensive renovation of the existing 4000 sf SFR, which would result in a GLA about 2000 sf above the neighborhood sandard, and 800 sf more than any other SFR, with corresponding superadequacy factored in);
Next, to determine the cost to complete the project, based upon (original quote + anticipated over-runs + misc) - percentage of project unfinished;
Next, to determine market reaction to partial completion, not realizing that only two similar SFR's had been marketed throughout a large residential area about 15 miles, both of which are actively listed at present with exposure 4X - 5X greater than typical exposure;
--I am still not very comfortable with the idea of personally determining the percentage of competion/remaining because the renovation/expansion project estimate was more than $1.5M, so an minor error of judgement on my part, regardless of any EA's, could affect the OV by $250K or more.
--I quoted a fee of much less than 50% of what it should be, but I'm not as concerned with revenue as I should be--although the COD still hasn't been paid, although I often advise BK clients to pay when they can do so, in order to facilitate the client's BK process, as my way to support the legal counsel (only losing $200 from the revenue from 3 dozen BK jobs).
--I wasted a week communicating with the owner's partner, later to realize that although he met me at the property, he wasn't designated as a contact person;
--I didn't realize that market info of similar construction projects was so sparse, although I also didn't also think about fixers, etc., which is next;
--I didn't realize that the builder wouldn't be helpful, although his reluctance in retrospect should have been obvious, specially b/c he immed realized that the apprisal probably was for a BK.
--Both the AF and my orig app mentor who also is a very successful broker provided similar cost/construction advice yesterday.
...and this morning's assignment is a SFR on a lot more than 2X larger than anything with 4 miles in a residential neighborhood--because the lot is located on a legal zoning "island" that affects only one block, within a neighborhood of typical regisdential lots--but the lot is 50% sloping so the lot adjustment will be factored by the lot utility adjustment. This could be an interesting career that should pay a heck of alot more than it does.