A building has an actual age of 25 years and an effective age of 30 years. If the total economic life is estimated at 60 years, what is the remaining economic life?
Correct Answer
B) 30 years
Remaining economic life is calculated as total economic life minus effective age. In this case: 60 years - 30 years = 30 years remaining economic life. Actual age is not used in this calculation.
Why This Is the Correct Answer
Option B (30 years) is correct because remaining economic life is calculated as total economic life minus effective age: 60 years - 30 years = 30 years. The effective age of 30 years represents the building's functional condition, which is what matters for determining how much useful life remains. The actual age of 25 years is irrelevant to this calculation, as the building's condition (reflected in effective age) is worse than its chronological age would suggest.
Why the Other Options Are Wrong
Option A: 25 years
Option A uses the actual age instead of effective age in the calculation (60 - 25 = 35), but then incorrectly states 25 years, creating a calculation error on top of using the wrong variable.
Option C: 35 years
Option C (35 years) incorrectly uses actual age instead of effective age in the calculation: 60 years - 25 years = 35 years, but remaining economic life must be based on effective age, not actual age.
Option D: 55 years
Option D (55 years) appears to subtract only 5 years from the total economic life, which doesn't correspond to either the actual age or effective age, representing a fundamental misunderstanding of the calculation.
TREE Formula
TREE: Total minus Effective = Remaining Economic life. Remember that the tree's remaining life depends on its current condition (Effective age), not when it was planted (actual age).
How to use: When you see remaining economic life questions, immediately look for Total Economic Life and Effective Age. Ignore actual age completely. Apply TREE: subtract Effective age from Total to get Remaining.
Exam Tip
Always identify which ages are given (actual vs. effective) and remember that remaining economic life calculations NEVER use actual age - only effective age matters.
Common Mistakes to Avoid
- -Using actual age instead of effective age in the calculation
- -Confusing which variable to subtract from total economic life
- -Adding ages together instead of subtracting effective age from total economic life
Concept Deep Dive
Analysis
This question tests understanding of the relationship between actual age, effective age, total economic life, and remaining economic life in real estate appraisal. The key concept is that remaining economic life is determined by the building's effective age (condition-based age) rather than its actual chronological age. Effective age reflects the building's current condition and functionality, which may differ from actual age due to maintenance, renovations, or deterioration. The calculation is straightforward: Total Economic Life minus Effective Age equals Remaining Economic Life.
Background Knowledge
Effective age represents the age of a building based on its current condition and functionality, which may be higher or lower than actual age depending on maintenance and improvements. Total economic life is the estimated period over which a building is expected to contribute to property value, while remaining economic life is the time left in that useful period.
Real-World Application
An appraiser evaluating a 25-year-old building that has been poorly maintained might assign an effective age of 30 years due to deferred maintenance, meaning the building has aged faster than its chronological age and has less remaining useful life than a well-maintained building of the same actual age.
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