The following relates generally to generating a property measurement (e.g., a property value, a construction replacement cost, a property health score, etc.) of a subject property, and, more particularly, to generating a property measurement of the subject property when at least one property parameter of the subject property is unknown or inaccurate. In some embodiments, a set of properties nearby the subject property is identified, and information of the set of properties is received. At least one property parameter (e.g., a year built, a square footage, a qualitative build grade of the subject property, etc.) is optimized. The property measurement of the subject property may then be optimized based upon the determined at least one property parameter.