Many times I had cost breakdowns handed to me by builders in support of a contract price some buyer agreed to pay them. I sometimes thought they were nuts. But once I had enough evidence to SOLIDLY prove that's what the MARKET was paying,
What the market is paying is price, we are hired to see if price represents value...a builder handing you a cost sheet and then you confirm that the cost sheet equals value because a buyer agreed to pay the price...did you check resales in the community or similar communities? Pendings and listings and how long on the market and price reducations? Most times, builder upgrades and "packages", including absurd lot premiums, do not hold up on resale prices, so clearly the value is not there, even though a buyer signed a contract for that amount.
Builders often have the first few "Sales" to friends/associates/straw buyers to establish the first critical sold comps they know the appraisers will rely on for price.
who the hell was I do disagree?
You are the appraiser, that's who you are, and your job is to "disagree".. By that I mean, your job is to question, and not automatically agree. Re, no matter the sales contract price or cost sheet a buyer signed off on, we do an independent appraisal , with the result that our value opinion may differ from a builder's cost sheet, or sales contract.
If your value opinion supports contract price, fine, if not, as an appraiser, you have to believe in your value opinion as the more credible.
Unsustainable suggests future, not present value. My appraisals were AS OF a specifiic date. With that said, their are boundaries and outliers that should be considered AND REPORTED, which I did and let the lender make the prudent lending decision.
Present prices can be unsustainable as of effective date, if one takes into account what made the prices too high to be sustained, such as favorable in house builder financing, prices inflated to cover the fact that the buyers are not really qualified (Super low down payment, with cash at closing back that becomes down payment, rolled into the price), lack of informed buyers (buyers paying premiums that are not seen as holding value on resale market), and other factors.