How was the Equivalent Residential Unit (ERU) determined for Richmond, VA?
The City of Richmond’s ERU was derived utilizing property classification data from the City Assessor’s Office and impervious area calculations from the City’s Geographic Information System (GIS). The base unit ERU is the median value of the estimated total impervious area for all single family residential units within the city of Richmond. This calculation for the City of Richmond is 1,425 square feet.