The fundamental principle of appraising is cost does not always equal value
Market data is market data. Nothing in the CA is not market data just like income data are market and sales data are market. They are interlocked, and no textbook tries to divorce that relationship. No textbook says the cost approach is never appropriate... do you own a textbook? Or is FNMA the only "textbook" you consider valid?
hy are;t people building new custom homes on them...
Lack of demand in a small market. I've worked any number of small towns that has never had a subdivision develop there. They are simply small tract or lot sales, and the occasional new home built. In Oklahoma, many of the new homes can be subsidized by the Cherokee or other tribes. But no developer is working outside the major towns like Grove, Muskogee, Tahlequah, or Sallisaw. Even there these are not always being developed but might be months or years between new development.
Would need to go 50+ miles for new builds but would tract homes not custom builds.
South part of Illinois? Small market? A paucity of sales does not mean there is no demand, just low demand. I'd go those 50 miles if necessary. So, if you have done other (older) properties in the same market, is there a functional obsolescence or externality (market resistance?) to those properties? If not, then there probably isn't an external negative to a new property.
Dealing with non-AMC local lenders is great.
Exactly. There is zero reason not to weight the CA in new construction where sales data are sparse. But that's not the Fannie way. One must use Fanniespeak when they are involved - ditto FHA. But here I'd bet half of new construction custom built is financed by conventional non-conforming loans. After the construction is completed then the bank often sets up permanent financing with secondary market.
What happens if that loan gets sold to an investor who orders a review on the appraisal?
Nothing. If the investor doesn't like it, they can order a new appraisal.
If you have sales to analyze to develop a credible SCA, then why even develop the CA at all?
Isn't that the OPs problem? And why would you not develop a CA on new construction? It should support the SA and make the report more reliable.
I fall in the camp that there really is only one approach to value.
I would have given you a like until that statement. You are a Dilmore adherent? I disagree with him sharply. There simply are situations where the cost approach and income approach are far better supported with the available data. Dismissing them as not "market" data - that's absurd. While we are tasked by USPAP to be aware of and apply the basics of appraisal techniques and thought, it is amazing to me how many appraisers think there is only one approach. USPAP apparently disagrees.
Are there no high end home sales within 50 miles for comparison?
If there are sales, and I can extract the effective age, I can also adjust for that effective age. This will make 3 negative adjustments that are quite large perhaps, but if you 'show your work' then I'd think you have supported the adjustment - not "proven" it - nothing proves an adjustment. But a lack of data is not a reason to pull a number out of the air.
The New Approach to Real Estate Appraising
by
Gene Dilmore (Author) 1971