1.3.1.4. Use History. In developing the appraisal, the appraiser must identify the purpose for which the improvements were designed and the dates of original construction and major renovations, additions, and/or conversions. This is particularly important for properties located in transitional areas (such as a residential neighborhood being converted to higher density residential and commercial uses) or special-use properties (such as church buildings converted to a commercial or residential use). The appraiser should identify a 10-year history of the use and occupancy of the property, if available. Past uses of the property may suggest historical contamination by hazardous substances.