An appraiser extracts land value from six improved sales and gets results ranging from $70,000 to $145,000. What does this indicate?
Correct Answer
C) The improvement estimates or sales differ widely
Why this is correct: The extraction method subtracts an estimated improvement value from the total sale price to indicate site value. A wide range in results signals inconsistency, likely in the estimated improvement contributions or in the comparability of the sales themselves (e.g., differing site characteristics). Why the other choices are wrong: 'The average of the six is the correct land value' is wrong; averaging masks the underlying problem of inconsistency. 'Extraction cannot be used in this market at all' is an overreaction; the wide range is diagnostic, not a blanket prohibition. 'Land values in the market are genuinely that wide' is unlikely for comparable sites; such a spread usually points to an issue with the analysis inputs. Exam tip: A wide range in extracted values is a red flag to check your improvement estimates and sales comparability, not a signal to simply average.
Why This Is the Correct Answer
The wide range is a symptom, and in extraction the symptom almost always traces to the subtrahend rather than to the land. Inconsistent cost estimates, inconsistent depreciation, or a set of sales spanning different improvement ages and qualities will all produce residuals that scatter. Reading the spread as a diagnostic prompt to revisit the improvement estimates and screen the sales is the analytically correct response. Choice C states that diagnosis directly.
Why the Other Options Are Wrong
Option A: The average of the six is the correct land value
Averaging inconsistent indications produces a number with a decimal point and no support behind it. The mean of a scattered residual set carries the same errors that created the scatter, simply concentrated into one figure that hides them. Reconciliation asks which indications are reliable, and here the honest answer is that none has been shown to be until the inputs are checked.
Option B: Extraction cannot be used in this market at all
Declaring the method unusable overreacts to a fixable problem, and extraction is often the only route to site value in a built-out area with no vacant land sales. The technique works best where improvements are new, simple, or a small share of value, and the fix is to tighten those conditions rather than abandon the approach. A wide range tells you the current application is weak, not that the method is invalid in the market.
Option D: Land values in the market are genuinely that wide
Site values can vary, but a two-to-one spread among sales the appraiser selected as comparable is not credible as a description of the land market. If land really did vary that much, the sales were not comparable to one another, which lands on the same conclusion the correct answer reaches. Accepting the spread as genuine also removes any reason to check work that has visibly failed a consistency test.
The Land Gets the Leftovers
In extraction the land is whatever is left after the improvements are taken out, so every mistake in the improvement estimate becomes a mistake in the land value. Sloppy leftovers, scattered land values.
How to use: When a stem reports a wide range from a residual technique, point the blame at the deducted component first. Choose the option that questions the inputs, not the option that averages, abandons, or accepts the spread.
Exam Tip
Any residual technique question that shows scattered results is testing whether you know where the error accumulates. Name the deducted component, and the right option becomes obvious.
Common Mistakes to Avoid
- -Averaging residual land indications instead of finding the source of the scatter
- -Blaming the land market for a range created by improvement cost and depreciation estimates
- -Using extraction where improvements are old and dominate value, so the residual is mostly error
Concept Deep Dive
Analysis
Extraction, sometimes called abstraction, estimates site value by subtracting the depreciated cost of the improvements from the price of an improved sale, so the land value is a residual. That structure means every error in the improvement estimate, whether in the cost figure or in the depreciation applied to it, lands entirely on the land number, and the smaller the land is as a share of total value the more each error is magnified. A spread from $70,000 to $145,000 across six sales in the same market is far wider than site characteristics alone would explain and points at the inputs rather than at the land. The diagnosis is either that the improvement contributions were estimated inconsistently, for instance by mixing cost sources or by applying depreciation by eye, or that the sales themselves are not comparable to one another in age, quality, or site utility.
Background Knowledge
You need the extraction method and how it differs from allocation, which uses a land-to-value ratio, and from the sales comparison method applied to vacant land. You also need to understand residual arithmetic well enough to see that all error in the improvement estimate transfers to the land figure, and to know the conditions under which extraction is most reliable.
Real-World Application
An appraiser extracting site values in an older neighborhood pulls cost figures for six houses from a cost service, applies age-life depreciation using inconsistent effective ages, and gets residuals from $70,000 to $145,000. Recalculating with one cost source and reconciled effective ages narrows the range to $92,000 to $108,000.
More Land/Site Questions
Under which condition is the land residual technique most applicable?
Why can the same physical parcel carry different values in two assignments?
In a built-up area where no vacant land has sold for years, which approach to site value is the usual fallback?
How is entrepreneurial profit treated in the subdivision development method?
A land comparable sold 18 months ago in a market rising about 4 percent a year. What adjustment direction applies?
Why does a developer's required profit rise for a longer subdivision project?
How does holding cost enter the valuation of land bought for future development?
Excess land is best described as land that has which characteristic?
Plottage value arises in which of the following situations?
Which of the following is an off-site improvement rather than a site improvement?
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