Oak Valley (Heritage Farms) located in Gainesville, VA –a Western Prince William County suburb has enjoyed a 10 year healthy rise in values with a median price of $661,000.  This is a small increase from $660,000 in 2017.  Oak Valley is an enclave of single family homes on sizable lots.  Annually less than 20 homes sell per year in the neighborhood making it one of the most stable neighborhoods in the Gainesville/Haymarket area.