Which of the following is an example of external obsolescence?
Correct Answer
C) A residential property located next to a newly constructed industrial plant
External obsolescence is depreciation caused by factors outside the property boundaries that cannot be controlled by the property owner. A nearby industrial plant affecting a residential property's desirability is a classic example of external obsolescence.
Why This Is the Correct Answer
External obsolescence is depreciation caused by factors outside the property boundaries that cannot be controlled by the property owner. A nearby industrial plant affecting a residential property's desirability is a classic example of external obsolescence.
Why the Other Options Are Wrong
Option A: A leaky roof
A leaky roof is physical deterioration, which is depreciation caused by wear and tear, damage, or deferred maintenance to the physical structure itself. This is within the property boundaries and can be controlled/corrected by the property owner through repairs or replacement.
Option B: A one-car garage in a neighborhood where two-car garages are standard
A one-car garage in a neighborhood where two-car garages are standard represents functional obsolescence, specifically functional inadequacy. This is depreciation caused by a deficiency in the property's design, layout, or features compared to current market standards, but it's still within the property boundaries.
Option D: Outdated kitchen appliances
Outdated kitchen appliances represent functional obsolescence due to outdated design or equipment that no longer meets current market expectations. Like option B, this is a deficiency within the property that could potentially be corrected by the owner through updates or renovations.
The EX-ternal Boundary Rule
Remember 'EX-ternal = EX-ternal to property boundaries.' External obsolescence always comes from OUTSIDE the property lines and is EXTERNAL to the owner's control. Think 'EX-ternal = EX-cluded from owner control.'
How to use: When you see obsolescence questions, immediately ask: 'Is this problem coming from outside the property boundaries?' If yes, it's external obsolescence. If it's on the property itself, determine if it's physical damage or functional inadequacy.
Exam Tip
Look for keywords indicating location or proximity in external obsolescence questions: 'next to,' 'nearby,' 'adjacent to,' 'in the area,' or 'neighborhood.' These signal factors outside the property boundaries.
Common Mistakes to Avoid
- -Confusing functional obsolescence with external obsolescence when the issue involves neighborhood standards
- -Thinking that external obsolescence can be cured by the property owner
- -Failing to recognize that external obsolescence affects the entire neighborhood, not just one property
Concept Deep Dive
Analysis
This question tests understanding of the three types of depreciation in real estate appraisal: physical deterioration, functional obsolescence, and external obsolescence. External obsolescence, also called economic obsolescence, is the only type of depreciation that originates from factors completely outside the property boundaries and beyond the owner's control. It's caused by negative influences in the surrounding area that diminish the property's value, such as environmental hazards, zoning changes, or incompatible land uses. Understanding this concept is crucial for appraisers to properly identify and measure all forms of value loss in the cost approach.
Background Knowledge
Appraisers must understand the three types of depreciation to properly apply the cost approach to value. Physical deterioration involves actual wear and damage to the structure, functional obsolescence involves design deficiencies or outdated features within the property, and external obsolescence involves negative influences from outside the property boundaries.
Real-World Application
In practice, appraisers encounter external obsolescence when valuing homes near airports (noise), industrial facilities (pollution/aesthetics), busy highways (traffic/noise), or in declining neighborhoods. This depreciation is often the most difficult to quantify and typically requires paired sales analysis or market extraction techniques to measure accurately.
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