Over-Improvement (Superadequacy)
An improvement that exceeds what the neighborhood supports — the $400,000 kitchen in a $350,000 market. The excess cost is not recovered in value; the difference is a form of functional obsolescence.
Related Terms
Superadequacy
An improvement or feature that exceeds what the market demands for the property type and location, resulting in a cost that is not fully recoverable in the sale price.
Principle of Conformity
The principle that property values are supported when properties in an area are reasonably similar in use, style, and value.
Contributory Value
The amount a component or feature adds to the property's overall value — which is rarely its cost.
Underimprovement
An improvement below the level the site and neighborhood would support — a modest cottage on an estate lot.
More in Property Characteristics
View allGross Living Area (GLA)
GLAThe total finished, above-grade living area of a residential property, measured in square feet.
Gross Building Area (GBA)
GBAThe total area of a building measured from the exterior walls, including all finished and unfinished, above-grade and below-grade spaces.
Below-Grade Area
Any portion of a building that is below the ground level on any side.
ANSI Z765 Measurement Standards
ANSIThe American National Standards Institute standard for measuring residential floor area.