Why Signal Hill Office Building? Location: Signal Hill office building is located in quickly re-developing eastern Loudoun County. Visibility: Signal Hill office building sits above Rt. 7 on the historic “Mirror Ridge” or “Signal Hill” with 3-mile sightlines east to Georgetown Pike and west to Dulles Town Center. Visibility on the corner of Rt. 7 and Rt. 637 is strategically important. Vehicular Access: Signal Hill office building has convenient, safe, direct vehicular access from Rt.7 and Rt. 637 (Potomac View Road). Adjacent to NOVA Loudoun: Signal Hill office building is adjacent to the 93-acre NOVA-Loudoun campus. NOVA Loudoun is the only Commonwealth of Virginia college in Loudoun County. Current enrollment rivals the main campus in Annandale.