Which type of depreciation is always incurable?
Correct Answer
B) External obsolescence
Why this is correct: External obsolescence (also called economic obsolescence) is a loss in value caused by negative factors outside the property's boundaries, such as a nearby nuisance, adverse zoning change, or economic decline of the neighborhood. By definition, it is always incurable because the property owner cannot control or economically eliminate these external causes. Why the other choices are wrong: 'All types can be either curable or incurable' is incorrect because external obsolescence is the exception—it is always incurable. 'Physical deterioration' can be either curable (e.g., a worn-out roof) or incurable (e.g., foundation settlement). 'Functional obsolescence' can also be curable (e.g., outdated but replaceable fixtures) or incurable (e.g., a poor floor plan in a concrete building). Exam tip: For the cost approach, remember the acronym 'PFE' for Physical, Functional, External. External is the one that's always Incurable.
Why This Is the Correct Answer
External obsolescence is always incurable because it results from factors beyond the property owner's control, such as economic conditions, neighborhood changes, or environmental issues. Since these factors exist outside the property boundaries, the property owner cannot take any action to eliminate or correct them. Even if the owner wanted to address external obsolescence, they lack the authority and resources to change external market conditions or neighborhood characteristics. This makes external obsolescence fundamentally different from physical deterioration and functional obsolescence, which can sometimes be corrected through renovation or modification.
Why the Other Options Are Wrong
The EX-ternal is EX-cluded Control Rule
Remember 'EX-ternal = EX-cluded from owner control = always incurable.' External factors are EX-ternal to the property, so they're EX-cluded from what the owner can fix. Think of it as 'EX-EX-EX' - EX-ternal, EX-cluded, EX-tremely unfixable.
How to use: When you see a question about depreciation curability, immediately think 'EX-EX-EX' and remember that anything external to the property boundaries cannot be controlled or cured by the property owner, making external obsolescence always incurable.
Exam Tip
Look for keywords like 'always,' 'never,' 'external,' and 'outside the property' in depreciation questions. These absolute terms often point to external obsolescence as the answer since it's the only type with absolute curability characteristics.
Common Mistakes to Avoid
- -Confusing functional obsolescence with external obsolescence
- -Thinking that expensive repairs automatically make physical deterioration incurable
- -Believing that all types of depreciation follow the same curability rules
Concept Deep Dive
Analysis
This question tests understanding of the three types of depreciation in real estate appraisal and their curability characteristics. Depreciation reduces property value, and the ability to cure (fix) depreciation depends on whether the property owner can control and economically justify correcting the issue. External obsolescence is unique because it stems from factors completely outside the property boundaries, such as economic downturns, neighborhood decline, or environmental issues. Understanding curability is crucial for appraisers when determining the highest and best use and estimating accurate property values.
Background Knowledge
Appraisers must understand the three types of depreciation: physical deterioration (wear and tear), functional obsolescence (design deficiencies), and external obsolescence (outside economic factors). The concept of curability depends on whether the cost to fix the problem is less than or equal to the resulting increase in property value, and whether the property owner has the ability to make the correction.
Real-World Application
An appraiser evaluating a well-maintained home next to a newly built industrial facility would note external obsolescence due to noise, odors, and decreased desirability. Even though the home itself is in excellent condition, the property value is negatively impacted by factors the homeowner cannot control or correct, demonstrating incurable external obsolescence.
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In the cost approach, economic obsolescence is characterized as:
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