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Property DescriptionMEDIUM20% of exam

A building has an actual age of 20 years and an effective age of 15 years. If the total economic life is estimated at 60 years, what is the remaining economic life?

Correct Answer

B) 45 years

Remaining economic life is calculated using effective age, not actual age. Remaining economic life = Total economic life - Effective age = 60 years - 15 years = 45 years.

Answer Options
A
40 years
B
45 years
C
50 years
D
55 years

Why This Is the Correct Answer

Option B is correct because remaining economic life must be calculated using effective age, not actual age. The formula is: Remaining Economic Life = Total Economic Life - Effective Age. Substituting the given values: 60 years - 15 years = 45 years. The actual age of 20 years is irrelevant to this calculation, as effective age better represents the building's true condition and utility.

Why the Other Options Are Wrong

Option A: 40 years

Option A incorrectly uses actual age instead of effective age in the calculation (60 - 20 = 40 years), which fails to account for the building's better-than-expected condition reflected in its lower effective age.

Option C: 50 years

Option C appears to subtract effective age from total economic life incorrectly, possibly confusing the calculation or misunderstanding which age measurement to use in the formula.

Option D: 55 years

Option D seems to result from subtracting actual age from total economic life and then adding something back, or from a fundamental misunderstanding of the relationship between the age measurements.

REAL Uses Effective

Remember 'REAL Uses Effective' - Remaining Economic Age Life calculation always Uses Effective age, never actual age. Think: 'What's REAL matters for the remaining life calculation.'

How to use: When you see a remaining economic life question with both actual and effective age given, immediately identify the effective age and ignore the actual age for your calculation.

Exam Tip

Always look for the effective age when calculating remaining economic life - if both actual and effective ages are provided, the actual age is likely a distractor.

Common Mistakes to Avoid

  • -Using actual age instead of effective age in the calculation
  • -Confusing remaining economic life with remaining physical life
  • -Adding instead of subtracting effective age from total economic life

Concept Deep Dive

Analysis

This question tests the fundamental concept of remaining economic life calculation in real estate appraisal, specifically the critical distinction between actual age and effective age. The key insight is that remaining economic life is always calculated using effective age, which reflects the building's condition and functional utility rather than its chronological age. Effective age can differ significantly from actual age due to factors like maintenance quality, renovations, or premature obsolescence. Understanding this concept is essential for accurate depreciation calculations in the cost approach to valuation.

Background Knowledge

Effective age represents the age of a building based on its condition and utility, while actual age is simply the chronological time since construction. Total economic life is the period over which a building contributes to property value, and remaining economic life indicates how much useful life remains.

Real-World Application

An appraiser evaluating a well-maintained 20-year-old office building might determine it has an effective age of only 15 years due to recent renovations and excellent upkeep, meaning it will contribute to property value longer than a typical 20-year-old building.

effective ageremaining economic lifetotal economic lifedepreciationcost approach

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