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Sales ComparisonMEDIUM16.4% of exam

A comparable has on-site environmental contamination that the subject does not. How should it be treated?

Correct Answer

A) Adjust the comparable for this physical characteristic difference

Environmental contamination is a negative physical characteristic that often has a substantial effect on value, so comparable prices should be adjusted for the difference. Adjustments are made to the comparable, not the subject.

Answer Options
A
Adjust the comparable for this physical characteristic difference
B
Ignore it, since contamination is not a factor affecting value
C
Adjust the subject downward instead of adjusting the comparable
D
Treat the contamination as a market conditions adjustment

Why This Is the Correct Answer

Option A is correct because environmental contamination may be viewed as a negative physical characteristic that often has a substantial effect on value. An adjustment should be made to comparable sale prices to reflect differences between the subject and the comparable for this characteristic. Adjustments are made to the comparable, not the subject.

Why the Other Options Are Wrong

Option B: Ignore it, since contamination is not a factor affecting value

Option B says to ignore contamination because it is not a factor affecting value. Contamination often has a substantial effect on value, so ignoring the difference would distort the comparison.

Option C: Adjust the subject downward instead of adjusting the comparable

Option C, adjusting the subject downward instead, reverses the method. Adjustments are made to the comparable's price toward the subject, and here the uncontaminated subject should not be penalized.

Option D: Treat the contamination as a market conditions adjustment

Option D treats contamination as a market conditions adjustment. Market conditions adjustments address changes over time; contamination is a property characteristic difference.

Dirt is a physical trait

Contamination is part of the property's physical characteristics, so it belongs in the physical adjustments to the comparable.

How to use: Use this when deciding which adjustment category covers contamination.

Exam Tip

Watch for options that adjust the subject; the sales comparison grid adjusts the comparables.

Common Mistakes to Avoid

  • -Adjusting the subject's value instead of the comparable's price
  • -Classifying contamination as a time adjustment
  • -Assuming contamination does not affect value

Concept Deep Dive

Analysis

This question tests how environmental contamination is treated in the sales comparison approach. Contamination may be viewed as a negative physical characteristic of the property. When the comparable has it and the subject does not, the comparable's price should be adjusted for the difference.

Background Knowledge

Physical characteristic adjustments account for differences in the properties themselves, such as size, condition and site features. Environmental contamination can be considered a negative physical characteristic. Because the subject is the property being valued, the comparable's price is adjusted toward the subject.

Real-World Application

A comparable house had a leaking underground heating oil tank at the time of sale, while the subject is clean. The appraiser researches the market effect of the contamination and makes an upward adjustment to the comparable, which is inferior in this respect.

environmental contaminationphysical characteristicscomparable adjustmentsales comparison approach
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