The principle of consistent use prohibits:

Correct Answer

A) Valuing the land for one use and the improvements for an incompatible use

Why this is correct: The principle of consistent use requires that land and improvements be valued based on the same highest and best use (HBU). Valuing land for a more intensive use (e.g., commercial) while valuing improvements for a less intensive use (e.g., residential) creates an inconsistent, unreliable value conclusion. Why the other choices are wrong: "Using the very same comparable sale in two different appraisal reports" is permissible if relevant. "Applying two approaches to one property" is standard appraisal practice. "Zoning changes during an assignment" may affect HBU but doesn't define the principle. Exam tip: In the cost approach, if the improvements do not contribute to the property's highest and best use, their contributory value may be low or zero, but the land and improvements must still be valued for the same use.