The Unit Area Value system is another variant of the earlier Annual Rateable Value (ARV) system. While the ARV was based on the expected rent from the property, the Unit Area Value is based on the expected returns from the property depending on the location and usage of the property. Since the unit of calculation is based on per square foot per month (UNIT) and for a particular location, street, (AREA) and multiplied by a rate (VALUE), this method of assessment of property is called “Unit Area Value” method. This is the same method adopted in the optional SAS during the year 2000 and also in the year 2008-09.