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Physical deterioration that is curable is measured by cost to cure, while incurable deterioration is measured by:

Correct Answer

D) Age-life ratios applied to the remaining cost

Why this is correct: Incurable physical deterioration is depreciation where the cost to cure exceeds the value added by the cure, or the item is not feasible to repair. It is measured by applying an age-life ratio (effective age / total economic life) to the reproduction or replacement cost new of the component. Why the other choices are wrong: 'The property's total accrued depreciation' is the sum of all depreciation types, not the measure for incurable physical. 'The full replacement cost of the component' would be the measure if it were curable. 'A flat percentage set by the cost service' is not a standard appraisal method for incurable deterioration. Exam tip: Curable = cost to cure. Incurable = age-life method applied to cost.

Answer Options
A
The property's total accrued depreciation
B
The full replacement cost of the component
C
A flat percentage set by the cost service
D
Age-life ratios applied to the remaining cost

Why This Is the Correct Answer

Incurable physical deterioration is measured by applying an age-life ratio to the cost basis remaining after curable and short-lived items have been removed.

Why the Other Options Are Wrong

Option A: The property's total accrued depreciation

Total accrued depreciation includes functional and external obsolescence as well as physical deterioration, and is the sum rather than a component.

Option B: The full replacement cost of the component

The full replacement cost of a component measures nothing about how much of its life has been consumed.

Option C: A flat percentage set by the cost service

A flat percentage from a cost service is not derived from the specific building's effective age and condition.

Curable Costs, Incurable Ages

Curable Costs, Incurable Ages. Fix it and charge the fix; cannot fix it and charge the ratio.

How to use: Remove curable and short-lived costs from the basis before applying the ratio, or you charge for them twice.

Exam Tip

Effective age reflects condition and modernisation rather than years since construction, which is why a well-maintained older building shows less depreciation.

Common Mistakes to Avoid

  • -Applying the age-life ratio to full cost new
  • -Using chronological rather than effective age
  • -Measuring incurable items at replacement cost

Concept Deep Dive

Analysis

Physical deterioration divides according to whether correction is economically justified. Curable items — a worn roof covering, deferred painting, a failed water heater — are measured by the cost to cure, because a buyer would deduct what it takes to put them right and the expenditure is recovered in value. Incurable deterioration cannot be measured that way, because by definition the cost of correction would not be recovered, or the item cannot practically be replaced at all: the structural frame, foundations, and the accumulated wear of long-lived components. Those are measured by an age-life ratio — effective age divided by total economic life — applied to the cost basis remaining after curable and short-lived items have been removed. Effective age rather than chronological age is used, since maintenance and modernisation change how old a building performs relative to its years. The removal step matters: applying the ratio to the full cost would charge the curable and short-lived items twice.

Background Knowledge

Physical deterioration is curable where cost to cure is recovered in value, measured by that cost. Incurable deterioration is measured by an age-life ratio using effective age and total economic life, applied to the remaining cost basis.

Real-World Application

An appraiser measures deferred maintenance at cost to cure, then applies a 25 percent effective-age ratio to the remaining long-lived cost basis.

physical deteriorationcurableincurableage-life ratioeffective age
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