Which of the following BEST describes external obsolescence?
Correct Answer
D) Loss in value from factors outside the boundaries
Why this is correct: External obsolescence is a form of depreciation caused by negative factors outside the subject property's boundaries, such as a nearby nuisance, economic decline, or zoning changes. It is incurable because the property owner cannot fix the external cause. Why the other choices are wrong: "Worn carpeting and outdated fixtures throughout" is wrong; that is physical deterioration (curable or incurable). "A poorly designed and inefficient floor plan layout" is wrong; that is functional obsolescence (often curable). "Items of deferred maintenance on the building" is wrong; that is physical deterioration (curable). Exam tip: External = outside the property. Incurable = owner can't fix it.
Why This Is the Correct Answer
Option C correctly identifies external obsolescence as value loss due to factors outside the property boundaries. This definition captures the essential characteristic that distinguishes external obsolescence from other types of depreciation - the external origin of the problem. The key phrase 'outside the property boundaries' clearly indicates that these are factors beyond the property owner's control and influence. This aligns perfectly with appraisal theory where external obsolescence is always classified as incurable depreciation.
Why the Other Options Are Wrong
The EXternal EXit Strategy
Remember 'EX-ternal = EX-it the property' - you have to leave (exit) the property boundaries to find the source of external obsolescence. Think of it as problems that make you want to 'exit' but you can't fix by staying inside.
How to use: When you see obsolescence questions, ask yourself: 'Do I need to exit the property to find this problem?' If yes, it's external obsolescence. If the problem is inside the property, determine if it's wear/tear (physical) or design/utility issues (functional).
Exam Tip
Look for keywords like 'outside,' 'beyond property,' 'neighborhood,' 'economic,' or 'environmental' when identifying external obsolescence questions. Remember that external obsolescence is ALWAYS incurable by the property owner.
Common Mistakes to Avoid
- -Confusing worn-out items (physical deterioration) with external obsolescence
- -Thinking functional obsolescence problems are external when they're actually internal design issues
- -Believing external obsolescence can be cured by the property owner
Concept Deep Dive
Analysis
External obsolescence is one of three types of depreciation in real estate appraisal, alongside physical deterioration and functional obsolescence. It represents a loss in property value caused by negative influences that originate outside the property boundaries and are beyond the property owner's control. This type of obsolescence is always considered incurable because the property owner cannot fix or eliminate the external factors causing the value loss. Examples include proximity to landfills, airports, busy highways, economic downturns in the area, or neighborhood decline.
Background Knowledge
Appraisers must understand the three types of depreciation: physical deterioration (wear and tear), functional obsolescence (design or utility issues), and external obsolescence (outside negative influences). Each type affects property value differently and has different cure possibilities, with external obsolescence always being incurable from the property owner's perspective.
Real-World Application
An appraiser evaluating a home near a newly constructed waste treatment facility would need to consider external obsolescence. Even if the home is in perfect condition with an ideal floor plan, its value may be negatively impacted by odors, noise, or buyer perception related to the facility - factors completely outside the homeowner's ability to control or cure.
More Cost Approach Questions
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In the cost approach, economic obsolescence is characterized as:
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