Which of the following is an example of a relevant property characteristic that could affect a real property appraisal assignment?

The choice regarding the fact that the subject property is affected by an easement is indeed a relevant property characteristic that could significantly impact a real property appraisal assignment. An easement can alter how a property is used, its value, and its marketability. For instance, if a property has an easement that allows others to pass through or use a section of the land, this could restrict the owner's use of the property and thereby influence the appraisal outcome.

When appraisers consider the attributes affecting a property's value, specific characteristics, such as easements, can have immediate implications on the property's utility and desirability. This is crucial because appraisals need to reflect the property's current condition and any legal encumbrances that may affect its market value.

The other options are also important aspects of property appraisal but do not hold the same level of direct contractual or legal implications as an easement. While square footage is a basic characteristic that can influence value, it does not carry legal implications like an easement does. Similarly, while neighborhood income levels and historical significance may provide context or influence buyer behavior, they do not represent direct, property-specific characteristics that would be pertinent to an appraisal in the same way an easement does.