The Winchester-Frederick County Economic Development Commission contracted with TischlerBise to design and implement a development impact model for use by Frederick County, VA. Once selected for this assignment, TischlerBise interacted with a public/private sector working group who reviewed level of service and cost/revenue assumptions and assisted with implementation of the finished model. Since most counties in Virginia are not authorized to collect impact fees, and therefore rely on “voluntary” cash proffers, the output on capital facility impacts provides valuable information for proffer negotiations at the time of rezoning.