A 2,400 square foot house has a poor floor plan with choppy room layout, inadequate storage, and poor traffic flow. This represents which type of depreciation?
Correct Answer
C) Functional obsolescence
Functional obsolescence occurs when a property lacks utility or desirability due to outdated design, poor layout, or inadequate features. Poor floor plans, inadequate storage, and traffic flow issues are classic examples of functional obsolescence.
Why This Is the Correct Answer
Functional obsolescence is depreciation caused by inadequate, outdated, or poor design features within the property that reduce its utility or desirability. Poor floor plans, choppy room layouts, inadequate storage, and poor traffic flow are all internal design deficiencies that make the property less functional compared to well-designed homes. These issues stem from the property's original design or layout decisions, not from physical wear or external factors.
Why the Other Options Are Wrong
Option A: Physical deterioration
Physical deterioration refers to depreciation caused by wear and tear, deferred maintenance, or physical damage to the property. Poor floor plans are design issues, not physical condition problems.
Option B: External obsolescence
External obsolescence (also called economic obsolescence) is depreciation caused by factors outside the property boundaries, such as nearby nuisances, zoning changes, or neighborhood decline. Floor plan issues are internal to the property.
Option D: Economic obsolescence
Economic obsolescence is another term for external obsolescence - depreciation caused by external economic factors. The poor floor plan is an internal design flaw, not an external economic influence.
PFE Depreciation Triangle
Physical = Condition, Functional = Function/Design, External = Environment. Remember 'Function Follows Form' - if the form (layout/design) doesn't work well, it's Functional obsolescence.
How to use: When you see layout, design, utility, or 'how the property works' issues, immediately think Functional. If it's about wear/tear/condition, think Physical. If it's about outside influences, think External.
Exam Tip
Look for keywords like 'layout,' 'design,' 'traffic flow,' 'room arrangement,' or 'utility' to identify functional obsolescence questions quickly.
Common Mistakes to Avoid
- -Confusing functional obsolescence with physical deterioration when both may be present
- -Thinking external obsolescence applies to any negative property feature
- -Not recognizing that functional obsolescence can be curable or incurable
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. Depreciation represents a loss in value from the cost of reproduction or replacement of improvements. The key is identifying which type of depreciation is caused by factors within the property itself versus external factors. Poor floor plans and layout issues are inherent design flaws that reduce the property's utility and desirability compared to more functionally designed homes.
Background Knowledge
Appraisers must understand the three types of depreciation to properly estimate property values using the cost approach. Physical deterioration involves condition issues, functional obsolescence involves design/utility issues, and external obsolescence involves outside influences beyond the property owner's control.
Real-World Application
Appraisers commonly encounter functional obsolescence in older homes with small kitchens, homes with only one bathroom, or properties with bedrooms accessible only through other bedrooms. These design flaws require adjustments in the sales comparison approach or recognition in the cost approach.
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