What Is Superadequacy?
Superadequacy is a form of functional obsolescence where a feature or system exceeds what the market actually wants or needs — meaning its cost is higher than the value it contributes.
Example
A home with an oversized commercial-grade HVAC system for its square footage has a superadequacy: it cost more to install than it adds to the home's market value.
Why it matters
Appraisers deduct for superadequacy in the cost approach, since a buyer generally won't pay extra just because a feature was expensive to build.
Related Terms
More Commercial & Appraisal Terms
This definition is provided for general educational purposes and is not financial, legal, tax, or real estate advice. Verify important decisions with appropriately qualified professionals.
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