Welcome to Classic Concept Builders, the 3 time Northern Virginia Building Industry Association "Builder Of The Year.". Just as no two masterpieces are ever the same, every home we build has its own unique custom look and feel. Start with one of our designs or bring us your own ideas. As a custom builder in Prince William County, Virginia, we feature 1 to 10+ acre estate homesites convenient to Fairfax, Loudoun, Stafford and Fauquier Counties in Virginia and the entire Washington, D.C. area.