As of April 1, 2015 the Herndon office will be moving to 13750 Sunrise Valley Dr. Suite 100 (access through rear of building), Herndon, VA 20171. The office is located in the National Concrete Masonry Association Building, about 3 miles from the current Herndon center. From Rt 28, exit on Frying Pan Road, take the first left onto Sunrise Valley Drive, and the center is 1.3 miles down on the left. From Centreville Rd. (coming from direction of Rt 50), turn left on Frying Pan Road, then right onto Sunrise Valley Drive. From Elden Street, turn right onto Sunrise Valley Drive and follow until 13750.