Which principle holds that the upper limit of value tends to be set by the cost of acquiring an equally desirable substitute?
Correct Answer
B) Substitution
The principle of substitution states that the upper limit of value tends to be set by the cost of acquiring an equally desirable substitute, by purchase or construction. It underlies all three approaches to value.
Why This Is the Correct Answer
Option B is correct because the principle of substitution states that the upper limit of value tends to be set by the cost of acquiring an equally desirable substitute, either by purchase or construction. This principle underlies all three approaches to value: comparable sales, the cost to build, and alternative income investments.
Why the Other Options Are Wrong
Option A: Contribution
Option A, contribution, holds that the value of a component is measured by what it adds to the whole, not by the cost of an equally desirable substitute.
Option C: Conformity
Option C, conformity, holds that value tends to be maximized when a property is reasonably similar to surrounding properties; it does not set an upper limit based on substitutes.
Option D: Balance
Option D, balance, concerns value being maximized when the agents of production are in proper proportion, not the cost of acquiring a substitute.
Why pay more?
A buyer asks: why pay more than it costs to get an equally good substitute? That ceiling is substitution.
How to use: Use this when a question refers to an upper limit of value or an equally desirable alternative.
Exam Tip
The phrase 'equally desirable substitute' points directly to the principle of substitution.
Common Mistakes to Avoid
- -Confusing substitution with contribution
- -Thinking substitution applies only to the sales comparison approach
- -Treating conformity as the source of an upper value limit
Concept Deep Dive
Analysis
This question tests recognition of the principle of substitution. The key phrase is that the upper limit of value is set by the cost of acquiring an equally desirable substitute. A knowledgeable buyer will not pay more for a property than it would cost to buy or build an equally desirable alternative.
Background Knowledge
Substitution is a foundation of appraisal theory. In the sales comparison approach, comparable sales represent substitutes; in the cost approach, the cost to build a substitute sets a ceiling; in the income approach, alternative investments with similar risk guide value. Other principles such as contribution, conformity and balance address different aspects of value.
Real-World Application
A buyer considers an existing house listed well above the price of nearly identical recent sales and above the cost of building a similar home nearby. The appraiser's sales comparison and cost analyses both reflect that buyers have substitutes, limiting the value the market will support.
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