Valuation and Analysis, 14% of the examination
Functional obsolescence
Loss in value from a defect inside the property boundary, such as an outdated floor plan.
Functional obsolescence is curable when the cost to fix is less than the value it adds, and incurable when it is not. External obsolescence comes from outside the boundary, such as a new freeway, and is always incurable because the owner cannot change it. Physical deterioration is wear and tear. The inside-or-outside test resolves nearly every depreciation classification question.
See also
See it in a question
One question from Valuation and Analysis, so the term lands in the context the exam uses it in.
An appraiser values a 40-year-old single-family home in an established neighbourhood with many recent sales. Which approach carries the most weight?
Written to DRE's published topic list. Not a real examination question, since reproducing those is a misdemeanour under B&P Code section 123.