The market value of real property is determined with the help of opinions developed and this process if known as real estate appraisal. In US, appraisals are done by considering certain value of standard. Market value is the most commonly used word there. The appraisal has a standardized form in United States and this is known as Uniform Residential Appraisal Report. A narrative appraisal report is used for the appraisals of complex properties. Such complex properties include income producing, raw land etc. Appraisal in United States is regulated by each state in the country. Professional organizations are available including real estate appraisers.