It's nice, every once in a while, for appraisers--when communicating (in part) an appraisal via a Fannie form--to go above and beyond the "check-box" mode of communication to provide SOME (as in "I seldom see any") analysis.
As to "above and beyond", the form has for many years now (and, yes, even now in light of the two reporting options) included the word "summary"; thus, what I suggest is nothing extraordinary (other than my observation that most appraisers don't go beyond the X'ing of the "yes" box).
Rant time.. (not at you, at the status quo). I agree, analysis sorely needed, and some appraisers do provide it. And then again some don't. The low fees and fast turn times prevalent are a disincentive to analysis
Imo, a new construction appraisal is a complex assignment but not treated as one by too many. Their solution is get 3 new home sales from builder that support subject SC price, stick them in, put in a token resale that supports price, then wrap up with brilliant conclusion (sarcasm) that buyers are willing to pay $X in "Castle View Estates" (grandiose name), therefore, subject is worth $ X.
Well, subject may or may not be worth $ X. What is needed in new construction appraisals is analysis of the builder premiums to buyers such as lot premiums and line item upgrades...are the buyers making informed choices ? How do the premiums hold up in the resale market? How does # of homes and phases in builder community impact value? Is the community too large, which might create over supply in area? How are resale's in community selling? How are the listings of resale's doing? How does subject community compete against other new communities and established recently built communities? What about community location? In a number of regions, the best land closer to water or cities is built out, leaving avail vacant tracts for building in outlying locations.
HBU as vacant, if site if area/site is commercial or mixed zoning or transitional it could be critical, but most builders have done their homework and the HBU and zoning is some form of residential.
Whether or not builder makes money is less important regarding site as vacant then it is about whether builder might run out of $ due to low sales and abandon community, leaving it half finished, which could impact subject value. (example of which analysis is more useful for intended use)