In 1999, additional parking spaces were built around County because of the addition of eight temporary trailers that were placed on a faculty parking lot due to overcrowding; the trailers were moved to Loudoun Valley the next year when Stone Bridge opened. In 2002, two high school seniors set an assistant principal's office on fire, closing school for a week. Because of the fire's damage, the school had to replace its old-fashioned bell system with an electronic one that the other five high schools at that time used. The main office was renovated before the end of the 2001-2002 school year.