The correct answer is B, Functional obsolescence. Functional obsolescence is a loss in value resulting from a defect, deficiency, or outdated characteristic within the property or its design that reduces utility or market desirability.
Examples include an obsolete floor plan, inadequate bathrooms for the size of the house, outdated electrical capacity, poorly arranged rooms, or building systems that no longer satisfy current market expectations.
Physical deterioration instead concerns actual wear, deterioration, or damage—such as a leaking roof, damaged siding, or deteriorated foundation.
External or economic obsolescence results from influences outside the property ' s boundaries, such as a nearby industrial nuisance, neighborhood decline, excessive traffic, or adverse external land-use change.
Functional obsolescence can be either curable or incurable. If the cost to correct the deficiency is economically justified by the resulting increase in value, it may be classified as curable. If correction costs exceed the likely value benefit, it may be incurable.
Study Guide Reference: Property Valuation and Appraisal — Depreciation; Functional, Physical and External Obsolescence.
