A real estate appraiser estimates the value of property for others. Many times, this type of property appraisal might be required such as in the case of a financed sale of real estate. Appraisals can also be ordered for large residential property developments, commercial property, vacant land, industrial property and much more. While a real estate agent would be working on the sales transaction, the appraiser would be developing an objective opinion of value on the subject property.