Under what circumstance might an appraiser use a hypothetical condition regarding property valuation?

In property valuation, a hypothetical condition refers to an assumption made about a property that is contrary to the reality of its existing state. This is often utilized when there is uncertainty or lack of information regarding specific attributes of the property that could affect its value.

Using a hypothetical condition in the context of property contamination is particularly relevant because it allows the appraiser to assess the property's potential value as if the contamination did not exist, or as if it were remediated, thus providing a clearer insight into the property's market conditions and investment potential. Appraisers must carefully disclose these hypothetical conditions to ensure that stakeholders are aware of the assumptions being made.

The other options do not align with the concept of using hypothetical conditions effectively. Certainty about a property's condition would generally not warrant the use of a hypothetical condition, as there would be no need for assumptions. Similarly, market trends indicating increased value or a client’s request for appraisals based on future market values do not necessarily involve a hypothetical condition since these scenarios pertain more to forecasting and projections rather than addressing existing conditions or uncertainties.