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Sales ComparisonMEDIUM16.4% of exam

For a given property type, how many meaningful units of comparison may a market have?

Correct Answer

C) More than one, depending on the market

Depending on the market, there may be more than one meaningful unit of comparison for a given type of property.

Answer Options
A
One, set by the appraisal form in use
B
Two, price per square foot and per room
C
More than one, depending on the market
D
None, since units apply to income property

Why This Is the Correct Answer

Option C is correct because, depending on the market, there may be more than one meaningful unit of comparison for a given type of property. The appraiser chooses units that reflect how buyers and sellers in that market price the property. Several units can be analyzed and compared for consistency.

Why the Other Options Are Wrong

Option A: One, set by the appraisal form in use

Option A says there is one unit set by the appraisal form in use. Units of comparison come from how the market prices the property, not from a form, and a market may have more than one meaningful unit.

Option B: Two, price per square foot and per room

Option B limits the answer to exactly two units, price per square foot and per room. The number and type of meaningful units depend on the market and may include other units, so a fixed pair is not the rule.

Option D: None, since units apply to income property

Option D claims none apply because units of comparison are only for income property. Units such as price per square foot are used for many property types, including residential and land.

Market picks the units

The market, not the form, tells you which units of comparison are meaningful, and there may be several.

How to use: Use this when a question asks how to choose or how many units of comparison to use.

Exam Tip

Be wary of options that fix a single unit or a set number of units regardless of the market.

Common Mistakes to Avoid

  • -Assuming the appraisal form dictates the unit of comparison
  • -Believing units of comparison apply only to income property

Concept Deep Dive

Analysis

This question tests understanding of units of comparison in the sales comparison approach. The market, not a form or a fixed rule, determines which units are meaningful. Depending on the market, more than one unit may be meaningful for the same property type.

Background Knowledge

A unit of comparison expresses sale prices in a common term, such as price per square foot, per acre or per unit, so sales of different sizes can be compared. The appropriate units are those the market uses. Analyzing more than one unit can help test the reliability of an indication.

Real-World Application

For a fourplex, an appraiser analyzes comparables by price per unit and price per square foot of building area. Both units are meaningful in that market, and the appraiser compares the two indications in reconciliation.

units of comparisonsales comparison approachprice per square footmarket evidence
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